Relevant bibliographies by topics / Ledi-Geraru

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters

Academic literature on the topic 'Ledi-Geraru'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Ledi-Geraru"

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Villmoare, B., W. H. Kimbel, C. Seyoum, C. J. Campisano, E. N. DiMaggio, J. Rowan, D. R. Braun, J. R. Arrowsmith, and K. E. Reed. "Early Homo at 2.8 Ma from Ledi-Geraru, Afar, Ethiopia." Science 347, no. 6228 (March 4, 2015): 1352–55. http://dx.doi.org/10.1126/science.aaa1343.

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Hawks, J., D. J. de Ruiter, and L. R. Berger. "Comment on "Early Homo at 2.8 Ma from Ledi-Geraru, Afar, Ethiopia"." Science 348, no. 6241 (June 18, 2015): 1326. http://dx.doi.org/10.1126/science.aab0591.

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Villmoare, B., W. H. Kimbel, C. Seyoum, C. J. Campisano, E. DiMaggio, J. Rowan, D. R. Braun, J. R. Arrowsmith, and K. E. Reed. "Response to Comment on "Early Homo at 2.8 Ma from Ledi-Geraru, Afar, Ethiopia"." Science 348, no. 6241 (June 18, 2015): 1326. http://dx.doi.org/10.1126/science.aab1122.

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Geraads, Denis, RenÉ Bobe, and Kaye Reed. "Pliocene Bovidae (Mammalia) from the Hadar Formation of Hadar and Ledi-Geraru, Lower Awash, Ethiopia." Journal of Vertebrate Paleontology 32, no. 1 (January 2012): 180–97. http://dx.doi.org/10.1080/02724634.2012.632046.

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Geraads, Denis, Kaye Reed, and Rene Bobe. "Pliocene Giraffidae (Mammalia) from the Hadar Formation of Hadar and Ledi-Geraru, Lower Awash, Ethiopia." Journal of Vertebrate Paleontology 33, no. 2 (March 2013): 470–81. http://dx.doi.org/10.1080/02724634.2013.723657.

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Bibi, Faysal, John Rowan, and Kaye Reed. "Late Pliocene Bovidae from Ledi-Geraru (Lower Awash Valley, Ethiopia) and their implications for Afar paleoecology." Journal of Vertebrate Paleontology 37, no. 4 (July 4, 2017): e1337639. http://dx.doi.org/10.1080/02724634.2017.1337639.

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DiMaggio, Erin N., J. Ramón Arrowsmith, Christopher J. Campisano, Roy Johnson, Alan L. Deino, Mark Warren, Shimeles Fisseha, and Andrew S. Cohen. "Tephrostratigraphy and depositional environment of young (<2.94 Ma) Hadar Formation deposits at Ledi-Geraru, Afar, Ethiopia." Journal of African Earth Sciences 112 (December 2015): 234–50. http://dx.doi.org/10.1016/j.jafrearsci.2015.09.018.

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Braun, David R., Vera Aldeias, Will Archer, J. Ramon Arrowsmith, Niguss Baraki, Christopher J. Campisano, Alan L. Deino, et al. "Reply to Sahle and Gossa: Technology and geochronology at the earliest known Oldowan site at Ledi-Geraru, Ethiopia." Proceedings of the National Academy of Sciences 116, no. 41 (September 17, 2019): 20261–62. http://dx.doi.org/10.1073/pnas.1911952116.

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Lazagabaster, Ignacio A., Antoine Souron, John Rowan, Joshua R. Robinson, Christopher J. Campisano, and Kaye E. Reed. "Fossil Suidae (Mammalia, Artiodactyla) from Lee Adoyta, Ledi-Geraru, lower Awash Valley, Ethiopia: Implications for late Pliocene turnover and paleoecology." Palaeogeography, Palaeoclimatology, Palaeoecology 504 (September 2018): 186–200. http://dx.doi.org/10.1016/j.palaeo.2018.05.029.

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Rowan, John, Ellis M. Locke, Joshua R. Robinson, Christopher J. Campisano, Jonathan G. Wynn, and Kaye E. Reed. "Fossil Giraffidae (Mammalia, Artiodactyla) from Lee Adoyta, Ledi-Geraru, and Late Pliocene Dietary Evolution in Giraffids from the Lower Awash Valley, Ethiopia." Journal of Mammalian Evolution 24, no. 3 (June 13, 2016): 359–71. http://dx.doi.org/10.1007/s10914-016-9343-z.

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Dissertations / Theses on the topic "Ledi-Geraru"

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"The geologic history of central and eastern Ledi-Geraru, Afar, Ethiopia." Doctoral diss., 2013. http://hdl.handle.net/2286/R.I.20899.

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abstract: Sedimentary basins in the Afar Depression, Ethiopia archive the progression of continental breakup, record regional changes in east African climate and volcanism, and host what are arguably the most important fossiliferous strata for studying early human evolution and innovation. Significant changes in rift tectonics, climate, and faunal assemblages occur between 3-2.5 million years ago (Ma), but sediments spanning this time period are sparse. In this dissertation, I present the results of a geologic investigation targeting sediments between 3-2.5 Ma in the central and eastern Ledi Geraru (CLG and ELG) field areas in the lower Awash Valley, using a combination of geologic mapping, stratigraphy, and tephra chemistry and dating. At Gulfaytu in CLG, I mapped the northern-most outcrops of the hominin-bearing Hadar Formation (3.8-2.9 Ma), a 20 m-thick section of flat-lying lacustrine sediments containing 8 new tephras that directly overlie the widespread BKT-2 marker beds (2.95 Ma). Paleolake Hadar persisted after 2.95 Ma, and the presence and characteristics of the Busidima Formation (2.7-0.016 Ma) indicates Gulfaytu was affected by a reversal in depositional basin polarity. Combined with regional and geophysical data, I show the Hadar Formation underlying CLG is >300 m thick, supporting the hypothesis that it was the lower Awash Pliocene depocenter. At ELG, I mapped >300 m of sediments spanning 3.0-2.45 Ma. These sediments coarsen upward and show a progression from fluctuating lake conditions to fluvial landscapes and widespread soil development. This is consistent with the temporal change in depositional environments observed elsewhere in the lower Awash Valley, and suggests that these strata are correlative with the Hadar Formation. Furthermore, the strata and basalts at ELG are highly faulted, and overprinted by shifting extension directions attributed to the northern migration of the Afar triple junction. The presence of fossiliferous beds and stone tools makes ELG a high-priority target for anthropological and archaeological research. This study provides a new temporally-calibrated and high-resolution record of deposition, volcanism, and faulting patterns during a period of significant change in the Afar.
Dissertation/Thesis
Ph.D. Geological Sciences 2013
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"Probability Models of Bone Surface Modification and Application to Fossil Evidence from Ledi-Geraru (2.82 Ma) and Dikika (3.39 Ma), Afar Ethiopia." Doctoral diss., 2019. http://hdl.handle.net/2286/R.I.53916.

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abstract: Two of the defining behaviors associated with the hominin lineage are an increased reliance on tool use and the routine incorporation of animal tissue in the diet. These adaptations have been linked to numerous downstream consequences including key physiological adaptations as well as social and cognitive effects associated with modern humans. Thus, a critical issue in human evolution is how to determine when hominins began incorporating significant amounts of meat into their diets. Bone surface modifications (BSM) have long been recognized as a powerful inferential tool in identifying the differential involvement of actors responsible for altering assemblages of bone recovered from both archaeological and paleontological contexts and remain a primary source of direct evidence for butchery activities. Thus, determining the spatiotemporal context of increased carnivory in the hominin lineage relies on the accurate identification of fossil BSM. Multidecade-long debates over the agents responsible for individual BSM indicate systemic flaws in historical approaches to identification. These debates are in part due to the extreme morphological overlap between BSM produced by certain agents of modification. The primary goal of this dissertation project therefore, is to construct probability models of BSM capable of identifying individual marks with an associated probability of assignment. Using a multivariate Bayesian approach to analyze experimentally-generated BSM data, this dissertation uses two different models, one incorporating both two and three-dimensional (3D) metric and attribute data associated with individual BSM and a second model comparing 3D geometric morphometric (GM) shape data associated with BSM. The 2D/3D attribute model of BSM is used evaluate an assemblage of fossil BSM recovered from the Ledi-Geraru research area, Ethiopia (2.82 Ma) in spatiotemporal association with early Homo. The results of the analysis reveal compelling evidence for early butchery activities, suggesting hominins may have been using both modified and unmodified stone implements to process carcasses. The second model, based upon 3D GM data, was used to evaluate the earliest purported evidence for stone-mediated butchery at Dikika, Ethiopia (3.39 Ma). The Dikika marks have been argued to be the result of crocodile feeding, trampling, and butchery by three different research groups. The 3D GM model evaluates the likelihood of each of these actors in the production of the controversial Dikika marks.
Dissertation/Thesis
Doctoral Dissertation Anthropology 2019
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"Tephrostratigraphy of Pliocene Drill Cores from Kenya and Ethiopia, and Pleistocene Exposures in the Ledi-Geraru Research Project Area, Ethiopia: Geological Context for the Evolution of Australopithecus and Homo." Doctoral diss., 2019. http://hdl.handle.net/2286/R.I.53904.

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abstract: East African extensional basins have played a crucial role in revealing the evolution and characteristics of the early stages of continental rifting and for providing the geological context of hominin evolution and innovation. The numerous volcanic eruptions, rapid sedimentation and burial, and subsequent exposure through faulting and erosion, provide excellent conditions for the preservation of tectonic history, paleoenvironment data, and vertebrate fossils. The reconstruction of depositional environments and provision of geochronologic frameworks for hominin sites have been largely provided by geologic investigations in conjunction with paleontological studies, like the Ledi-Geraru Research Project (LGRP). High-resolution paleoclimate records that can be directly linked to hominin fossil outcrops have been developed by the Hominin Sites and Paleolakes Drilling Project (HSPDP) which collected sedimentary-paleolake cores at or near key hominin fossil sites. Two chapters of this dissertation are a result of research associated with the HSPDP. For HSPDP, I establish a tephrostratigraphic framework for the drill cores from the Northern Awash (Afar, Ethiopia) and Baringo-Tugen Hills-Barsemoi (Kenya) HSPDP sites. I characterize and fingerprint tephra through glass shard and feldspar phenocryst geochemistry. From tephra geochemical analyses, I establish chronostratigraphic ties between the HSPDP cores’ high-resolution paleoclimate records to outcrop stratigraphy which are associated with hominin fossils sites. Three chapters of this dissertation are a result of field work with the LGRP. I report new geological investigations (stratigraphic, tectonic, and volcanic) of two previously unmapped regions from the eastern Ledi-Geraru (ELG), Asboli and Markaytoli. Building upon this research I present interpretations from tephra analyses, detailed stratigraphic analyses, and geologic mapping, of the Pleistocene (~2.6 to < 2.45 Ma) basin history for the LGRP. My work with the LGRP helps to reconstruct a more complete Early Pleistocene depositional and geologic history of the lower Awash Valley. Overall, this dissertation contributes to the reconstruction of hominin paleoenvironments and the geochronological framework of the Pliocene and Pleistocene faunal/hominin records. It further contributes to rift basin history in East Africa by elaborating the later structural and stratigraphic history of the lower Awash region.
Dissertation/Thesis
Doctoral Dissertation Geological Sciences 2019
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Book chapters on the topic "Ledi-Geraru"

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Roman, D. C., C. Campisano, J. Quade, E. DiMaggio, J. R. Arrowsmith, and C. Feibel. "Composite tephrostratigraphy of the Dikika, Gona, Hadar, and Ledi-Geraru project areas, northern Awash, Ethiopia." In The Geology of Early Humans in the Horn of Africa. Geological Society of America, 2008. http://dx.doi.org/10.1130/2008.2446(05).

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Dupont-Nivet, Guillaume, Mark Sier, Christopher J. Campisano, J. Ramón Arrowsmith, Erin DiMaggio, Kaye Reed, Charles Lockwood, Christine Franke, and Silja Hüsing. "Magnetostratigraphy of the eastern Hadar Basin (Ledi-Geraru research area, Ethiopia) and implications for hominin paleoenvironments." In The Geology of Early Humans in the Horn of Africa. Geological Society of America, 2008. http://dx.doi.org/10.1130/2008.2446(03).

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