By W. Henry Gilbert, Berhane Asfaw
This quantity, the 1st in a chain dedicated to the paleoanthropological assets of the center Awash Valley of Ethiopia, stories Homo erectus, a detailed relative of Homo sapiens. Written via a crew of extremely popular students, this ebook presents the 1st distinctive descriptions, pictures, and research of the fossil vertebrates--from elephants and hyenas to humans--from the Daka Member of the Bouri Formation of the Afar, a spot popular for an considerable and long list of human ancestors. those fossils give a contribution to our realizing human evolution, and the linked fauna supply new information regarding the distribution and variability of Pleistocene mammals in japanese Africa. The members are all lively researchers who labored at the paleontology and geology of those detailed deposits. the following they've got mixed their disparate efforts right into a unmarried quantity, making the unique study effects obtainable to either the expert and the overall reader. the amount synthesizes environmental backdrop and anatomical element to open an unheard of window at the African Pleistocene and its population.
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Additional resources for Homo erectus: Pleistocene Evidence from the Middle Awash, Ethiopia (The Middle Awash Series)
Example text
Lithologic variations are noted along the strike of the Daka Member sedimentary deposits. For example, more alternating silty clay beds occur in the northern part, compared with those sandstone-dominated sections exposed in the central and southern parts of the Daka Member. 6 View to the southeast over Daka Member sediments in BOU-VP-19. Photograph by Tim White, December 28, 1997. 4). The stratigraphic descriptions for each of the Daka Member sections measured along the strike of the Bouri Horst (and numbered 21 G E O LO GY AND GEO C H RO NO LO GY sequentially from northwest to southeast) are highlighted in the following paragraphs.
BOU-VP-25 Locality BOU-VP-25 was designated in 1998. Hola Kadir collected the first fossil here. In 1998, the survey team collected 46 specimens. A total of 42 additional specimens were collected at this locality in 1999. 4). The lower unit occurs between pumiceous sand, a lateral variant of the HPU, and the overlying Wokari Vitric Tuff. It is likely the stratigraphic equivalent of the lower fossiliferous unit of BOU-VP-19. The second fossil-bearing horizon is above the Wokari Tuff in similar stratigraphic position to the fossil-bearing strata in the northern sector of BOU-VP-4.
020 Ma (1 uncertainties) and are mutually indistinguishable at 95 percent confidence. 006 Ma, which we infer to date a single eruption, essentially synchronous with deposition of the tuffaceous, pumice-bearing sand. 006 Ma, providing broad chronological control for the Daka Member. 4). All Daka Member samples (PMMA97-6, 7, and 8) have reverse polarity, consistent with their deposition prior to the Bruhnes-Matuyama geomagnetic polarity reversal at ca. 790 Ma. 009 Ma and all reversed, it can be deduced that they postdate the Jaramillo subchron.