The Ziway–Shala lake basin system, Main Ethiopian Rift: Influence of volcanism, tectonics, and climatic forcing on basin formation and sedimentation

Turdu, C. Le; Tiercelin, Jean-Jacques; Gibert, E.; Travi, Yves; Lezzar, Kiram E.; Richert, Jean-Paul; Massault, M.; Gasse, Françoise; Bonnefille, Raymonde; Decobert, M.; Gensous, Bernard; Jeudy, Vincent; Tamrat, Endale; Mohammed, Mohammed Umer; Martens, Koen; Atnafu, Balemwal; Chernet, Tesfaye; Williamson, David; Taieb, Maurice

doi:10.1016/s0031-0182(98)00220-x

Cited by 136 publications

(130 citation statements)

References 55 publications

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“…1). The region in which these sites are found is well known for paleoclimatic and paleoenvironmental studies and includes one of the best dated Pleistocene stratigraphic sequences in the world, as recently reviewed by Le Turdu et al (1999), Benvenuti et al (2002), and Morgan and Renne (2008), although archaeological investigations in the region are still sparse. Excavated in the early 1970's by Wendorf and colleagues (e.g., Wendorf and Schild, 1974), the sites of Gademotta and Kulkuletti have yielded the earliest MSA artefacts in Ethiopia, and perhaps in the world.…”

Section: The Archaeological Sitesmentioning

confidence: 99%

Provenance of middle Stone Age obsidian artefacts from the central sector of the Main Ethiopian Rift Valley

Negash

Brown

Alene

et al. 2011

SEJS

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ABSTRACT:The Gademotta/Kulkuletti sites, located in the central part of the Main Ethiopian Rift Valley, represent the earliest Middle Stone Age (MSA) sequences in the country. Here we present the geochemical provenance of obsidian archaeological artefact recovered through excavation at the site. The artefacts and source materials were characterized by EDXRF and electron microprobe. Results show that the artefacts were procured from two sources, one local, and one presumably more distant, implying that despite the local availability of good quality raw material, not all obsidians were procured from a nearby source.

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Section: The Archaeological Sitesmentioning

confidence: 99%

Provenance of middle Stone Age obsidian artefacts from the central sector of the Main Ethiopian Rift Valley

Negash

Brown

Alene

et al. 2011

SEJS

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“…2), and the valley floor has a lower actual annual evapotranspiration (656 mm) than the escarpments (892 mm) and highlands (917 mm), because it is mostly covered with bare lacustrine soils (Ayenew 2003). The potential evaporation, however, ranges from >2500 mm on the valley floor to <1000 mm in the highlands (Le Turdu et al 1999). The (i) The increasing temperature on the valley floor over the last 40 years has increased evaporation, mainly from the four lakes (Ziway, Langano, Abiyata, and Shala) that occupy roughly 11% of the total area of the Central Rift Valley (Ayenew 2003), to the extent that the increased evaporation could significantly alter the water cycle and lead to an increase in rainfall.…”

Section: Effect Of Deforestation On Long-term Rainfall Patternmentioning

confidence: 99%

Effects of long-term deforestation and remnant forests on rainfall and temperature in the Central Rift Valley of Ethiopia

Muluneh

Loon²,

Bewket

et al. 2017

For. Ecosyst.

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Background: Some evidence suggests that forests attract rain and that deforestation contributes to changes in rainfall and temperature. The evidence, however, is scant, particularly on smaller spatial scales. The specific objectives of the study were: (i) to evaluate long-term trends in rainfall (1970-2009) and temperature (1981-2009) and their relationships with change in forest cover, and (ii) to assess the influence of remnant forests and topographical factors on the spatial variability of annual rainfall.

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“…The main rift is dotted with a series of Quaternary rift basins where current rift extension and both basaltic and silicic magmatism is focused (Hayward & Ebinger 1996). Since the Middle Pleistocene fluvio-lacustrine basins developed along the Quaternary Rift Basins under a tectonic-volcanic control (Le Turdu et al 1999), followed by development of the Late Pleistocene-Holocene fluvio-lacustrine basin of the Lakes region. The Main Ethiopian rift splits into two branches south of the Lake Abaya-Chamo basin.…”

Section: Geomorphological Setting Of Ethiopiamentioning

confidence: 99%

Geoheritage conservation in Ethiopia: the case of the Simien Mountains

Asrat

Demissie

Mogessie

2012

Quaestiones Geographicae

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AbstrAct. Ethiopia constitutes one of the most significant environmental and cultural reserves on Earth. Ethiopia's natural and cultural tourist attractions are mostly associated with geological features: the active Ethiopian and Afar rifts as well as the Simien and Bale massifs are few examples. Ethiopia's cultural history, religious manifestations and civilization, like the rock-hewn churches of Lalibela and the stelae of Axum, are also imprinted in rock. Geomorphological and geological features, notably the isolation of the north-western highlands from the external world by the harsh Afar depression close to the sea, determined the route of Ethiopian history. Though tourism has been identified as a major sustainable development sector, systematic geoheritage evaluation and conservation strategies are lacking in the country. In this paper the Simien Mountains are presented as major geoheritages which should be prioritized for geoconservation in order to develop sustainable tourism (geotourism) in the area.

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The Ziway–Shala lake basin system, Main Ethiopian Rift: Influence of volcanism, tectonics, and climatic forcing on basin formation and sedimentation

Cited by 136 publications

References 55 publications

Provenance of middle Stone Age obsidian artefacts from the central sector of the Main Ethiopian Rift Valley

Provenance of middle Stone Age obsidian artefacts from the central sector of the Main Ethiopian Rift Valley

Effects of long-term deforestation and remnant forests on rainfall and temperature in the Central Rift Valley of Ethiopia

Geoheritage conservation in Ethiopia: the case of the Simien Mountains

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