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Afar Triangle

The Afar Triangle is a geologically active depression spanning northeastern Ethiopia, southern Eritrea, and northern Djibouti in the Horn of Africa, formed at the Afar Triple Junction where the Nubian, Arabian, and Somali tectonic plates diverge as part of the East African Rift System. This hyperarid region, often called the Danakil or Afar Depression, lies mostly below sea level and experiences extreme heat, with daytime temperatures frequently exceeding 50°C (122°F), creating a harsh environment of salt flats, lava fields, and hydrothermal features. It serves as a natural laboratory for observing continental rifting processes, including crustal thinning and potential seafloor spreading that could eventually form a new ocean basin between Africa and the Arabian Peninsula. Additionally, the area's sedimentary basins have preserved one of the most complete records of hominin evolution over the past 6 million years, including the iconic 3.2-million-year-old Australopithecus afarensis skeleton known as "Lucy," discovered in the Hadar Formation in 1974.) Geologically, the Afar Triangle exemplifies subaerial rift tectonics, with ongoing extension causing normal faulting, graben formation, and frequent volcanic eruptions along axes like the Erta Ale range. The crust here is unusually thin—around 15–20 km—due to mantle upwelling and magma intrusions, leading to phenomena such as blue flames from sulfur combustion, acidic hot springs, and salt volcanoes like Dallol, which formed from interactions between basaltic intrusions and underlying evaporite deposits dating back at least 6,000 years. Volcanic activity, including shield volcanoes such as Erta Ale with its persistent lava lake, underscores the region's role in the transition from continental to oceanic rifting, with dike intrusions and faulting driving episodic seismic and magmatic events, as seen in the 2004 reactivation of hydrothermal systems at Dallol. Recent seismic swarms, such as the one from December 2024 to February 2025 including a magnitude 6.0 earthquake, highlight continued tectonic activity.^[1] Beyond its tectonic importance, the Afar Triangle holds profound paleoanthropological value, with sites like Hadar, Gona, and Middle Awash yielding fossils that illuminate early human ancestry, bipedalism, and environmental adaptations. The interplay of rifting, basin migration, and climate has shaped diverse paleoecosystems, from woodlands to arid plains, influencing hominin dispersal and evolution. Inhabited by the Afar people for millennia, who traditionally mine and trade salt, the region also faces modern challenges from volcanic hazards, resource extraction, and climate change, highlighting its ongoing dynamic nature.

Geography

Location and Extent

The Afar Triangle is a triangular-shaped geological depression in the Horn of Africa, formed at the Afar Triple Junction where the Red Sea Rift, the Gulf of Aden Rift, and the East African Rift intersect as part of a divergent plate boundary.^[2] This region represents a unique onshore exposure of a divergent triple junction where the Nubian, Arabian, and Somalian plates interact, creating a low-lying basin that extends below sea level in parts.^[3] Centered approximately at 12°N 41°E, the Afar Triangle spans about 200,000 km², with the majority of its area lying within Ethiopia, and smaller portions extending into Eritrea and Djibouti.^[4] Its boundaries are defined by prominent topographic features: to the north, the Danakil Horst forms the escarpment along the Red Sea; to the east, the Somali Plateau rises sharply; to the west, the Ethiopian Highlands create a steep escarpment; and to the south, the region transitions toward the Main Ethiopian Rift.^[3] These margins enclose a vast, arid depression characterized by extreme heat and minimal elevation variation across its interior.^[5] Politically, the Afar Triangle is divided among three countries, reflecting colonial-era borders that fragmented the traditional Afar territory. In Ethiopia, it encompasses most of the Afar Region, a federal administrative area covering northeastern lowlands.^[6] In Eritrea, it overlaps with the Southern Red Sea Region, including coastal and inland areas along the southern border.^[7] In Djibouti, the western portion falls within the Tadjoura Region, north of the Gulf of Tadjoura, where Afar communities predominate in the arid interior.^[8] This transboundary nature underscores the region's geopolitical complexity while highlighting its shared geological identity.^[9]

Topography and Hydrography

The Afar Triangle exhibits a dramatic elevation range, descending to approximately -155 meters below sea level at Lake Assal in Djibouti, the lowest point in Africa, and rising to over 2,000 meters on the surrounding Ethiopian and Danakil plateaus. This topographic contrast defines the region's stark landscape, with the central Danakil Depression forming the lowest point of the entire area at around -125 meters below sea level near the Salt Plain. Key landforms include expansive salt flats, such as those at Dallol, where colorful hydrothermal crusts and evaporite formations create a surreal terrain, and volcanic highlands like the Erta Ale range, which features shield volcanoes rising several hundred meters above the surrounding lowlands.^[10]^[11]^[12] The hydrography of the Afar Triangle is characterized by endorheic basins, where water does not reach the sea but accumulates in closed depressions, leading to high evaporation rates and salinity. The Awash River, the primary perennial watercourse, flows northeastward through the southern Afar, seasonally feeding hypersaline lakes such as Lake Abhe (at about 240 meters above sea level) and Lake Afrera (at -112 meters below sea level) before dissipating into the arid plains. These lakes, along with others like Lake Karum (-120 meters below sea level), are fed by intermittent streams and underground inflows, resulting in extreme salinity levels that support minimal aquatic life. Geothermal springs and geysers, particularly around Dallol and the Alid volcanic center, emerge from the subsurface, discharging hot, mineral-rich waters that contribute to local evaporite precipitation.^[13]^[14]^[12]^[11] Surface materials in the Afar Triangle predominantly consist of vast evaporite deposits, including halite and gypsum from ancient marine incursions, interspersed with Quaternary basalt flows from rift-related volcanism and broad alluvial plains formed by sediment deposition from seasonal rivers. These basaltic lavas, often flat-lying in fields like the Oss Basalt, cover much of the depression floor, while evaporites dominate the salt pans and lake margins, reflecting the region's hyperarid conditions and tectonic subsidence. Alluvial fans fringe the escarpments, transporting sediments from the highlands into the central basins.^[11]^[11]

Geology

Tectonic Framework

The Afar Triangle represents a rare subaerial exposure of a ridge-ridge-ridge (R-R-R) triple junction, where the Nubian (African), Arabian, and Somalian tectonic plates diverge, forming a Y-shaped rift system in the Horn of Africa. This junction, located within the Afar Depression, facilitates the transition from continental rifting to seafloor spreading and serves as a key site for studying plate boundary evolution. The configuration arises from the northward propagation of the East African Rift System interacting with the older Red Sea and Gulf of Aden spreading centers, resulting in a diffuse boundary zone rather than a sharp triple point.^[15]^[16] The three principal rift arms define the tectonic framework: the northern Red Sea Rift, which exhibits oblique spreading due to the ~30° mismatch between the plate motion vector (N60°E) and the rift trend (N-S), leading to partitioned extension along en echelon fault segments; the southeastern Gulf of Aden Rift, characterized by more orthogonal seafloor spreading along the Sheba Ridge; and the southwestern Main Ethiopian Rift, a zone of active continental rifting marked by magmatic segmentation and border fault systems. These arms accommodate the overall plate separation, with the Red Sea and Gulf of Aden arms representing mature oceanic spreading centers that connect to the Afar, while the Main Ethiopian Rift propagates southward into the East African Rift.^[17]^[15] Spreading across the system occurs at rates of approximately 1–2 cm/year for the Red Sea (10–15 mm/year) and Gulf of Aden (15–20 mm/year) rifts, reflecting the primary divergence between the Arabian and Nubian/Somalian plates, whereas the continental sector of the Main Ethiopian Rift experiences slower extension of 6–8 mm/year due to partitioning of the total Nubia-Somalia motion. Structural elements include oblique rifting patterns with left-lateral transform faults, such as the incipient transform zone beneath Lake Afdera that links rift segments, and accommodation zones—broad regions of cross-cutting normal and strike-slip faults—that transfer strain between adjacent rift basins and facilitate along-axis variations in extension direction.^[18]^[14]^[19]

Geological History

The geological history of the Afar Triangle began in the pre-rift phase during the Oligocene, approximately 33 to 30 million years ago, when extensive flood basalts erupted from the Afar hotspot, a mantle plume originating from the lower mantle. These basalts, part of the broader Ethiopian Trap Series, covered an area of roughly 600,000 km² across the region, forming a thick volcanic foundation that predated significant tectonic extension.^[20]^[21] Rifting initiated in the early Miocene, around 25 to 20 million years ago, coinciding with the opening of the Gulf of Aden as the Arabian Plate separated from the African Plate, propagating westward into the Afar region. This phase marked the onset of NE-directed extension, leading to the formation of initial rift segments and volcanic activity. By the Pliocene, approximately 5 million years ago, continental breakup accelerated in the southern Afar, with the development of the East African Rift and localization of strain along magmatic segments, transitioning the region toward oceanic spreading.^[22]^[3] A pivotal event influencing the northern Afar was the Messinian salinity crisis around 5.96 million years ago, which isolated the Mediterranean from the Atlantic and triggered desiccation of the adjacent Red Sea basin, extending effects into the Afar through subaerial exposure, erosion, and subsequent reflooding from the Gulf of Aden via submarine pathways. In the Pleistocene to Holocene, ongoing magmatism and subsidence dominated, driven by magma intrusions that thinned the lithosphere and caused axial downwarping, particularly in the Danakil Depression.^[23]^[24] The stratigraphic record reflects this evolution, with Oligocene basalts at the base overlain by Miocene-Pliocene syn-rift sediments, including clastic red beds and lacustrine deposits, interspersed with volcanic layers. Evaporites, such as halite and potash minerals up to 900 meters thick, accumulated in the Late Pleistocene to Holocene due to repeated marine incursions and desiccation in subsiding basins. In northern sectors, the crust transitions from attenuated continental (25-30 km thick) to proto-oceanic, with thinning to 15-20 km under magmatic zones, signaling incipient seafloor spreading.^[25]^[26]^[22]

Volcanic and Seismic Activity

The Afar Triangle hosts several active volcanoes, with Erta Ale being the most prominent due to its persistent basaltic lava lake in the summit caldera, active continuously since at least 1967.^[27] This shield volcano, located in the Danakil Depression, frequently exhibits low-level eruptive activity, including overflows from the lava lake and fissure eruptions along its flanks, as seen in the 2017 event that produced extensive lava flows.^[28] Dallol features intense hydrothermal fields characterized by acidic brine pools, intermittent geysers, and salt formations resulting from subsurface volcanic heating of hypersaline groundwater.^[29] These features create a highly acidic environment with pH levels as low as 0.3, driven by ongoing geothermal processes.^[30] Dubbi, a stratovolcano on the eastern margin, last erupted in 1861, producing explosive activity, pyroclastic flows, and lava that reached the Red Sea, marking the largest historical eruption in the region.^[31] Seismic activity in the Afar Triangle is frequent and often linked to magmatic intrusions, with the 2005–2010 rifting episode at the Dabbahu-Manda Hararo segment producing thousands of earthquakes, including over 15 events exceeding magnitude 5.^[32] This period involved 13 dike intrusions that propagated laterally, causing significant ground deformation measurable via satellite interferometry, with surface displacements up to several meters in places.^[33] Such swarms typically migrate along rift segments, reflecting magma movement and crustal extension at rates of 1–2 cm per year.^[28] Recent volcanic and rifting events underscore the region's dynamism. The 2017 Erta Ale flank eruption was fed by a shallow dike, while ongoing subsidence at Dallol has been linked to magmatic withdrawal since 2014.^[34] The 2005–2010 episode featured rift-opening fissures exceeding 60 km in length, accompanied by basaltic eruptions and continued seismicity into the 2010s.^[28] More recently, as of 2025, Erta Ale experienced eruptions on January 14 and July 15, producing ash plumes and lava flows, with activity continuing through September.^[27]^[35] In the southern Afar, a seismic swarm from September 2024 to March 2025 at the Fentale volcanic area involved successive dyke intrusions, with over 177 earthquakes recorded by January 2025, the strongest reaching magnitude 5.7.^[36]^[37] Geothermal manifestations at sites like Dallol persist, with active geysers and acid pools posing localized risks from scalding fluids and toxic gases.^[38] Volcanic hazards in the Afar Triangle include slow-moving lava flows from Erta Ale that can cover tens of square kilometers, ash falls from explosive events like Dubbi's 1861 eruption that affected regional shipping, and hazardous gas emissions such as sulfur dioxide and hydrogen chloride from hydrothermal vents.^[39] These pose threats to sparse local populations and infrastructure, though the remote terrain limits widespread impact. Monitoring is conducted through a combination of local seismic networks by the Ethiopian Institute of Geophysics, Space Science and Astronomy, and international efforts using satellite remote sensing and ground-based observations to track deformation and gas plumes.^[40]

Paleoenvironment and Ecology

Climate and Paleoclimate

The Afar Triangle experiences a hyper-arid desert climate, classified under the Köppen system as BWh, characterized by extremely low annual rainfall typically below 100 mm in the core Danakil Depression, with some areas receiving as little as 50 mm. Temperatures are among the highest on Earth, with daytime highs frequently exceeding 50°C and a mean annual temperature of 34.7°C at Dallol, the hottest inhabited location globally. This extreme heat is exacerbated by minimal cloud cover and high solar insolation, leading to intense diurnal temperature fluctuations.^[41]^[41] Seasonal patterns are dominated by a prolonged dry period, with a short, erratic wet season from June to September driven by the northward migration of the Intertropical Convergence Zone, resulting in sporadic but intense flash floods that briefly alleviate aridity. Northeast trade winds, akin to harmattan flows from the Sahara, prevail during the cooler dry season (October to May), enhancing evaporation and dust mobilization across the region. These winds contribute to the area's persistent dryness, with evapotranspiration rates reaching up to 4,000 mm annually at sites like Dallol. Topographic depressions amplify this aridity by trapping hot air.^[41]^[41]^[41] Paleoclimate reconstructions reveal markedly wetter conditions during the Pliocene (approximately 3–5 Ma), when expansive lakes and grasslands supported more humid environments, as evidenced by lacustrine sediment cores from the Hadar Formation showing diatom assemblages indicative of deep, well-mixed water bodies. Aridification intensified since the Pleistocene, linked to shifts in monsoon patterns that reduced effective moisture, transitioning the landscape toward dominance by C₄ grasslands. This drying is documented through stable isotope analyses (δ¹⁸O and δ¹³C) of pedogenic carbonates from Gona sediments, which record a 6.5‰ increase in meteoric water δ¹⁸O and a shift in vegetation proxies from C₃ woodlands to grass-dominated systems by ~1.5–0.5 Ma. Additional proxies, including pollen and phytolith records from East African Rift drill cores, confirm fluctuating humidity with periodic wet phases tied to orbital forcings.^[42]

Biodiversity and Ecosystems

The Afar Triangle's biodiversity is shaped by its extreme arid and hyperthermal conditions, resulting in sparse but highly adapted plant and animal communities that thrive in one of Earth's most inhospitable environments. Vegetation is predominantly limited to drought-resistant species confined to seasonal watercourses known as wadis and occasional oases, where sparse desert shrubs such as Acacia species provide critical shade and forage. Along the banks of intermittent rivers like the Awash, doum palms (Hyphaene thebaica) form small groves, their deep roots accessing groundwater in an otherwise desiccated landscape.^[43]^[44] Around the region's expansive salt lakes, such as Lake Afrera and the hypersaline flats of the Danakil Depression, halophytic plants dominate, including salt-tolerant succulents and grasses like Suaeda and Salsola species that tolerate high salinity levels exceeding 30% in some areas. In geothermal zones, particularly near Dallol's acidic hydrothermal fields, microbial mats composed of extremophilic algae and bacteria form colorful crusts on evaporite surfaces, enduring pH values below 1 and temperatures up to 110°C. These algal communities contribute to mineral precipitation and represent some of the most acid-resistant photosynthetic life on Earth.^[45]^[29]^[46] Faunal diversity is low in absolute terms but features resilient species uniquely adapted to the scarcity of water and vegetation. Mammals include the Beisa oryx (Oryx beisa beisa), a desert antelope that derives moisture from plants and can survive without free water for extended periods, and the hamadryas baboon (Papio hamadryas), which forages across rocky escarpments and salt pans in large troops. Endemic rodents, such as the Awash multimammate mouse (Mastomys awashensis), highlight the region's high evolutionary distinctiveness, driven by geographical isolation within the rift valleys. In Dallol's polyextreme pools, ultra-small archaeal and bacterial extremophiles, including acidophilic Halorubrum species, persist in hypersaline, hyperacidic brines, offering insights into potential life forms in extraterrestrial environments like Mars.^[47]^[48]^[49]^[50] The Afar Triangle encompasses distinct ecosystems, including vast salt flat communities where halophilic microbes and salt-tolerant invertebrates form the base of sparse food webs, supporting occasional visits by nomadic herbivores. Oasis riparian zones along wadis foster more diverse assemblages, with doum palm stands and acacia thickets serving as refugia for birds and small mammals amid the surrounding desert scrub. Volcanic slopes around active sites like Erta Ale host thermotolerant lichens and pioneering microbial crusts on basaltic lava flows, while the interplay of rifting and aridity creates fragmented habitats that limit species dispersal. These ecosystems face escalating threats from habitat fragmentation due to expanding salt mining and pastoral land use, compounded by climate change-induced droughts that exacerbate water scarcity and shift vegetation boundaries. Recent events, such as the July 2025 windstorm in Afdera that displaced 26,000 people and heightened flood risks, underscore the intensifying climate impacts on local ecosystems.^[51]^[52]^[53] Conservation efforts center on protected areas like Yangudi Rasa National Park, which spans over 4,700 square kilometers and safeguards desert-adapted species such as the Beisa oryx, hamadryas baboon, and Grevy's zebra (Equus grevyi) in arid plains and escarpments. The park's rugged terrain helps mitigate human-wildlife conflicts, though challenges persist from pastoral encroachment and limited resources. The Dallol area emerges as a global biodiversity hotspot for extremophiles, with ongoing research emphasizing its role in astrobiology and the preservation of polyextreme microbial communities against industrial exploitation.^[54]^[55]^[46]

Human Presence and Significance

Prehistoric Inhabitants

The Afar Triangle has yielded some of the earliest evidence of hominin presence in eastern Africa, dating back to approximately 5.8 million years ago with fossils attributed to Ardipithecus kadabba from the Middle Awash region.^[56] These late Miocene remains, including teeth and postcranial elements, suggest early adaptations toward bipedalism in wooded environments along ancient river systems.^[56] Subsequent discoveries span the Pliocene and into the Pleistocene, documenting a progression of hominin species and behaviors, from arboreal locomotion to habitual upright walking and the emergence of stone tool use.^[57] Key paleoanthropological sites in the Afar Triangle, such as Middle Awash, Dikika, Gona, and Hadar, have provided critical fossils and artifacts illuminating early hominin evolution. At Middle Awash, the 4.4-million-year-old partial skeleton of Ardipithecus ramidus, including a relatively complete pelvis and limbs, indicates a mosaic of bipedal and arboreal traits, with evidence of foraging in a mix of forests and grasslands. The Dikika site has produced the 3.3-million-year-old juvenile Australopithecus afarensis skeleton known as "Selam," offering insights into growth patterns and early bipedal locomotion, alongside cut-marked animal bones dated to 3.4 million years ago that suggest pre-Oldowan tool use for meat processing.^[58] At Gona, stone tools from 2.6 million years ago represent the oldest known archaeological evidence, while ~1.5-million-year-old Homo erectus crania and associated Oldowan and Acheulian artifacts demonstrate advanced butchery techniques on large mammals near riverine habitats.^[59] The Hadar site is renowned for the 3.2-million-year-old A. afarensis partial skeleton "Lucy" (AL 288-1), whose knee joints and foot bones confirm fully bipedal gait despite a small brain size of about 400 cubic centimeters.^[60] These discoveries from the Afar Triangle provide essential insights into hominin adaptations during the Pliocene-Pleistocene transition, a period marked by increasing aridity and habitat mosaics that influenced dietary shifts and locomotor efficiency.^[61] Fossil evidence shows early hominins like A. afarensis navigating fragmented woodlands with tools for exploiting C4 grasses and scavenging, highlighting behavioral flexibility amid environmental instability.^[62] Such findings underscore the region's role in tracing the origins of key human traits, including upright posture and resource procurement strategies.^[57]

Modern Population and Economy

The Afar Triangle is predominantly inhabited by the Afar ethnic group, numbering approximately 2 million people in the Ethiopian Afar Region, with additional populations in adjacent areas of Eritrea and Djibouti, forming a total of around 3 million across the region.^[63] The population maintains a low density of about 22 people per square kilometer, reflecting the harsh desert environment and semi-nomadic lifestyle centered on pastoralism.^[64] The Afar speak a Cushitic language from the Afroasiatic family and are predominantly Sunni Muslims, blending Islamic traditions with pre-Islamic customs such as animist beliefs and clan-based social structures.^[65] Traditional practices persist, including the historic salt caravans departing from sites like Dallol in the Danakil Depression, where Afar miners extract and transport salt slabs using camels in a practice dating back centuries.^[66] The economy of the Afar Triangle revolves around subsistence pastoralism and resource extraction, with about 85% of the population relying on herding goats, sheep, camels, and cattle for milk, meat, and trade.^[67] Salt mining remains a cornerstone, particularly around Lake Afdera and the Danakil area, where manual labor extracts vast quantities—supplying up to 80% of Ethiopia's salt market—through rudimentary tools and camel caravans for transport to inland markets.^[66] Emerging sectors include large-scale potash mining for fertilizers and industrial uses, as well as geothermal energy exploration leveraging the region's volcanic hot springs, which could diversify income and create thousands of jobs through projects like the Semera Industrial Park.^[68] Small-scale fishing and fodder production are also growing as alternatives amid livestock losses.^[67] Residents face significant challenges, including inter-communal conflicts over scarce water and pasture resources, particularly between Afar pastoralists and neighboring Issa-Somali groups, exacerbated by drought and border disputes that have displaced hundreds of thousands since the Tigray War.^[63] Health issues are compounded by extreme heat exceeding 50°C, isolation from urban centers, and recurrent droughts leading to high rates of malnutrition, cholera outbreaks, and infant mortality around 67 per 1,000 live births as of 2016 (EDHS), exceeding national averages.^[69] Development efforts include irrigation projects along the Awash River, such as community-based schemes in the Middle Awash Basin, which aim to expand agriculture for over 20,000 hectares but risk further resource tensions if not managed equitably.^[70]

Scientific Importance

The Afar Triangle stands as a premier natural laboratory for tectonic studies, exemplifying the processes of continental rifting and the incipient formation of ocean basins. As the site of the Afar Triple Junction—where the Nubian, Somali, and Arabian tectonic plates diverge at rates up to 1.5 cm per year—it provides a rare subaerial view of a divergent plate boundary, allowing researchers to observe the transition from continental to oceanic crust in real time. The region's thinned crust, reduced to less than 20 km thick in places compared to the typical 35 km continental average, underscores its advanced stage of breakup.^[71] Magnetic anomalies detected in the Afar Depression reveal striped patterns characteristic of early seafloor spreading, marking the initial development of oceanic crust and supporting predictions that a new ocean basin will form between the Somali and Nubian plates within 5 to 10 million years. These features, observed through high-resolution geophysical surveys, highlight the Afar as a model for understanding global plate tectonics and the long-term evolution of rift systems into mature ocean ridges.^[72] In paleoanthropology, the Afar Triangle has been pivotal in uncovering evidence of human origins, with sites like Hadar yielding over 240 hominin fossils spanning 3.0 to 3.4 million years ago, including Australopithecus afarensis specimens that illuminate bipedal locomotion and early adaptations. Ongoing excavations have further disclosed dietary strategies, such as the use of Oldowan stone tools for butchering hippopotamus and processing C4-rich plants, alongside indicators of social behaviors like cooperative food sharing among early hominins and Paranthropus.^[73]^[74] Beyond tectonics and human evolution, the Afar contributes to astrobiology through its polyextreme environments, such as the Dallol geothermal area, where acidophilic and halophilic extremophiles thrive in conditions of pH near 0, temperatures up to 112°C, and hypersalinity—serving as terrestrial analogs for Martian hydrothermal systems and potential biosignatures. Paleoenvironmental records from the rift, including episodic sedimentation tied to tectonic and climatic shifts around 100 ka, enable refined climate modeling of Pleistocene variability and its influence on ecosystems and hominin dispersal.^[75]^[76] Recent advances, including the 2024 Fentale diking episode that accommodated strain via magma intrusion alongside fault slip, signal accelerated rifting dynamics potentially hastening continental separation. International efforts like the Afar Rift Consortium have integrated seismic, GPS, and InSAR data to monitor these processes, fostering collaborative insights into magmatic influences on breakup. A 2025 discovery of pulsing mantle plumes beneath the region further reveals dynamic deep-Earth drivers responsive to surface tectonics, reinforcing the Afar's role in predicting rift evolution.^[77]^[78]^[79]

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Simplified tectonic map of the triangular-shaped Afar Depression. The Dallol volcano (star) is located in the northern part of the Danakil Depression.Missing: hydrography | Show results with:hydrography
[29]
Dallol Hydrothermal System - microbewiki
Pools and terraces of the Dallol hydrothermal system. ... The Dallol hydrothermal system is in the northern part of the Danakil Depression in the Afar Triangle ( ...
[30]
Dubbi - Global Volcanism Program
The two most recent eruptions were fed by fissure systems that extend NW-SE and NNE-SSW. The former produced lava flows that reached the Red Sea in 1400 CE.Missing: 1841 | Show results with:1841
[31]
The volcano–seismic crisis in Afar, Ethiopia, starting September 2005
Mar 15, 2007 · We describe the seismo–volcanic crisis that occurred in northern Afar in late 2005, which involved 15 earthquakes greater than M5 and a small explosive silicic ...
[32]
Sequence of rifting in Afar, Manda‐Hararo rift, Ethiopia, 2005–2009 ...
Oct 16, 2010 · Thirteen dike intrusions in the Manda Hararo rift, Afar (Ethiopia), from September 2005 to June 2009, studied using an extensive ...
[33]
The 2017 Eruption of Erta 'Ale Volcano, Ethiopia: Insights Into the ...
Nov 23, 2019 · A fissure on the south flank of Erta 'Ale began erupting on 21 January 2017 and has remained active until at least July 2019.
[34]
Origin and Evolution of the Halo-Volcanic Complex of Dallol - Frontiers
Jan 16, 2020 · Our results suggest that the recorded history of the dome began when at least one deep magmatic basalt intrusion occurred later than 6000 years ago.
[35]
14 - Recent volcanic eruptions in the Afar rift, northeastern Africa ...
Between 2005 and 2012, there were seven volcanic eruptions in the Afar region, including a rhyolitic ash eruption and three basaltic fissure eruptions.
[36]
Ethiopia Volcanoes - Global Volcanism Program
Ethiopia Volcanoes ; Erta Ale, 2025 CE, Afar Rift Volcanic Province, Shield ; Fentale, 1789 CE, Main Ethiopian Rift Volcanic Province, Composite.Missing: Triangle | Show results with:Triangle
[37]
https://www.unocha.org/publications/report/ethiopia/ethiopia-flash-update-4-seismic-situation-afar-and-oromia-23-january-2025
[38]
None
Summary of each segment:
[39]
The Water of the Awash River Basin: a Future Challenge to Ethiopia
Hyphaene thebaica (Doum palm) formations are characteristic but strongly degraded over the area. ... Afar Triangle across the rift valley [94] . ...
[40]
[PDF] Hyphaena thebaica (Gingerbread palm, African Doum Palm) Size ...
Sunny, very well drained position. Can tolerate temperate clmates, but prefers it hot. Very drought tolerant. Landscape Information. Plant Image.
[41]
Saharan Halophytic | One Earth
The Saharan Halophytics cover a number of saline depressions scattered across northern Africa. The most extensive areas from west to east are Iriki and Oued ...Missing: Afar | Show results with:Afar
[42]
Ultra-small microorganisms in the polyextreme conditions of ... - Nature
May 27, 2019 · Here, the interaction between the evaporitic deposit and the volcanisms have created the unique Dallol hot springs, which are highly acidic (pH ...
[43]
The Afar Triangle - Visit Ethiopia
It straddles Ethiopia, Eritrea and Djibouti in the Horn of Africa. In terms of geology, Afar appears as a unique place on the planet. It has features that ...
[44]
Population size and structure of beisa oryx and gerenuk in Geralle ...
Jul 15, 2024 · The study was conducted to determine the population size of endangered Oryx beisa (Rüppell, 1835), and near‐threatened Litocranius walleri (Brooke, 1878)
[45]
(PDF) Rodents of the Afar Triangle (Ethiopia) - ResearchGate
Jan 9, 2022 · ... The Awash multimammate mouse Mastomys awashensis (Fig. 1 S1) Previously, the species was thought to be endemic to the Awash River valley ( ...
[46]
In Earth's hottest place, life has been found in pure acid - BBC
Aug 4, 2017 · In the Dallol crater, the geothermal activity increases the temperature even further, so the brine water reaching the surface is about 100C.Missing: Triangle | Show results with:Triangle
[47]
[PDF] NATIONAL BIODIVERSITY THREAT ASSESSMENT - biodev2030
Rodents of the Afar Triangle (Ethiopia): geographical isolation causes high level of endemism. Biodiversity and Conservation, https://doi.org/10.1007/s10531 ...
[48]
Ecology, evolution, and conservation of Ethiopia's biodiversity - PNAS
Approximately 6,000 species have been identified across 12 vegetation types, and exhaustive profiles can be found in the Flora of Ethiopia and Eritrea (18) and ...Missing: Triangle | Show results with:Triangle
[49]
Yangudi Rassa National Park - Absolute Ethiopia Tours
Oct 27, 2025 · It is a vital refuge for desert-adapted wildlife, including the Wild Ass, Soemmerring's Gazelle, Hamadryas Baboon, Gerenuk, and Grevy's Zebra.
[50]
Yangudi-Rassa National Park - Ethiopian Wildlife
Yangudi-Rassa National Park is situated between the towns of Gewani and Mille, at the heart of the Afar Region within the northern expanse of the Rift Valley.
[51]
The Earliest Hominins: Sahelanthropus, Orrorin, and Ardipithecus
Although an age range of 7–6 Ma is suggested for Sahelanthropus, cosmogenic ... Geology and paleontology of the late Miocene Middle Awash valley, Afar rift, ...Missing: Triangle | Show results with:Triangle
[52]
Continuous evolutionary change in Plio-Pleistocene mammals of ...
Our new analyses of the eastern African Plio-Pleistocene mammalian fossil record indicate that most species originations and extinctions took place continuously ...<|control11|><|separator|>
[53]
Ethiopia: The Dikika Research Project
Alemseged's landmark 2000 discovery of "Selam"—the 3.3 million-year-old fossil of an Australopithecus afarensis girl—was the most complete skeleton of a human ...
[54]
https://absoluteethiopia.com/experience/yangudi-rassa-national-park/
[55]
Lucy: A marvelous specimen | Learn Science at Scitable - Nature
The fossil locality at Hadar where the pieces of Lucy's skeleton were discovered is known to scientists as Afar Locality 288 (A.L. 288). Johanson and the rest ...
[56]
Plio-Pleistocene environmental variability in Africa and its ... - PNAS
Apr 11, 2022 · Significance. We have developed an Africa-wide synthesis of paleoenvironmental variability over the Plio-Pleistocene.
[57]
Fossils from Mille-Logya, Afar, Ethiopia, elucidate the link ... - Nature
May 19, 2020 · Here we report on new results that shed light on the interplay between tectonics, basin migration and faunal change on the one hand and the fate ...
[58]
[PDF] AFAR REGION - Rift Valley Institute
This is increasingly counteracting its relatively small population size (around 2 million) and economy, with its only major industry being salt mining.2 Afar ...Missing: density | Show results with:density
[59]
Afar (Region, Ethiopia) - Population Statistics, Charts, Map and ...
Afar. 2,090,910 Population [2022] – Projection. 95,000 km² Area. 22.01/km² Population Density [2022]. 2.5% Annual Population Change [2007 → 2022]. Map Chart ...Missing: 2023 | Show results with:2023
[60]
[PDF] Afar of Ethiopia - Horn of Africa Evangelical Mission
Religious Beliefs: The Afar were heavily influenced by Islam and it is still held in great esteem. However, many pre-Islamic beliefs and customs are also.
[61]
[PDF] AFAR'S SALTY POLITICS: - Rift Valley Institute
The local population mainly consists of Afar pastoralists, although there are highlanders—especially in Afdera town—engaged in salt-related economic activities.
[62]
[PDF] EXAMINING ALTERNATIVE LIVELIHOODS FOR IMPROVED ...
About 85 percent of the Afar population practice pastoralism (Afar Atlas, 2014). Pastoralists in all the areas covered in this study practice pastoralism, ...Missing: Triangle | Show results with:Triangle
[63]
Afar: The Land of Beauty and Nature's Bounty
These minerals, along with geothermal energy and hot springs, offer significant economic opportunities. • Potash is used widely in fertilizers, improving crop ...
[64]
The climate crisis is affecting the last nomadic Afar tribe
Feb 14, 2024 · The Afar nomadic indigenous people of East Africa are fighting to preserve their distinct way of life amid climate catastrophe.
[65]
Awash River's the Ongoing Irrigation Practices, Future Projects and ...
Jul 20, 2021 · Awash River basin 37 irrigation potential sites are identified out of which 5 are small-scale, 18 are medium-scale, and 14 are large-scale. The ...
[66]
Are We Seeing a New Ocean Starting to Form in Africa? - Eos.org
May 8, 2020 · The Afar region, at the nexus of tectonic plate boundaries, may be in the process of undergoing the transition from continental rift to oceanic ...<|control11|><|separator|>
[67]
Magnetic stripes of a transitional continental rift in Afar | Geology
Mar 1, 2012 · ... magnetic anomalies of reversed polarity. This work shows that ... Early continental breakup boundary and migration of the Afar triple junction, ...
[68]
Newly discovered fossil hominid skull from the Afar depression ...
Nov 2, 1978 · DURING a palaeontological, archaeological and geological survey in the Awash River Valley, Ethiopia, members of the Rift Valley Research ...Missing: excavations | Show results with:excavations
[69]
Expanded geographic distribution and dietary strategies of ... - Science
Feb 9, 2023 · The oldest Oldowan tool sites, from around 2.6 million years ago, have previously been confined to Ethiopia's Afar Triangle.
[70]
The Dallol Geothermal Area, Northern Afar (Ethiopia)
The Dallol area represents an excellent Mars analog environment given that the active volcanic environment, the associated diffuse hydrothermalism and ...
[71]
Integrative geochronology calibrates the Middle and Late Stone ...
Dec 6, 2021 · Halibee member sediments are primarily associated with the Pleistocene paleo-Awash River and its tributaries. Sediments range from fine-grained ...
[72]
The 2024 Fentale Diking Episode in a Slow Extending Continental Rift
Sep 17, 2025 · This event provides compelling evidence for strain accommodation by magma intrusion, in addition to slip along normal faults, during the initial ...
[73]
Magmatic rifting and active volcanism: introduction - Lyell Collection
Over the next five years, a further 13 dyke intrusions caused continued extension, eruptions and seismicity. The activity in Afar led to a renewed international ...
[74]
Geoscientists Find Pulsing Mantle Plume beneath Ethiopia's Afar ...
Jun 30, 2025 · The findings show that the mantle plume beneath the Afar region is not static, but dynamic and responsive to the tectonic plate above it.