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1	A Contribution to the Evolutionary History of Ethiopian Hipparionine Horses (Mammalia, Equidae): Morphometric Evidence From de Postcranial Skeleton Bernor, Raymond L., Scott, Robert S., Haile-Selassie, Yohannes 01 March 2005 (has links) (PDF) A morphometric analysis of third metapodials and first phalanges of Middle Awash and Hadar hipparions dating from the 6.0-3.0 Ma interval was conducted using two methods. Morphological comparisons using standard metrics were made using: 1) log10 ratio diagrams; 2) size independent variables developed with reference to scaling trends for hipparions in general. Results of these analyses suggest that hipparion diversity during this temporal interval was relatively low. A single dominant gracile lineage of Eurygnathohippus Van Hoepen, 1930, most plausibly derived from the Lothagam (Kenya) species Eurygnathohippus feibeli (Bernor & Harris, 2003), would appear to have persisted throughout this interval and is marked by increases in size with measured change in metapodial and phalangeal morphology. A rarer, more robust form is found in the Ethiopian sample at 4.0 Ma and is morphometrically similar to Eurygnathohippus turkanense Hooijer & Maglio, 1973 from late Miocene horizons of Lothagam. Another smaller form, of uncertain systematic status, appears likely late in the Kada Hadar sequence, c. 3.0 Ma. equidae Ethiopia evolution hadar hipparionine mammalia middle awash morphometrics postcranials
2	TEPHROSTRATIGRAPHIC AND GEOCHEMICAL INVESTIGATION OF COMPOSITIONALLY HETEROGENEOUS SILICIC TEPHRA IN THE MIDDLE AWASH REGION, AFAR, ETHIOPIA Walkup, Laura Casey 16 August 2013 (has links) No description available. Geochemistry Geological Geology Volcanology Tephrostratigraphy Tephra Correlation Tephrochronology Volcanic Ash Tephra Silicic Tephra Silicic Volcanic Eruptions Hominid Evolution Ethiopia Afar Main Ethiopian Rift Middle Awash

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A Contribution to the Evolutionary History of Ethiopian Hipparionine Horses (Mammalia, Equidae): Morphometric Evidence From de Postcranial Skeleton

TEPHROSTRATIGRAPHIC AND GEOCHEMICAL INVESTIGATION OF COMPOSITIONALLY HETEROGENEOUS SILICIC TEPHRA IN THE MIDDLE AWASH REGION, AFAR, ETHIOPIA