51334
2018
2018
eng
11174
11179
6
44
115
article
National Academy of Sciences
Washington
1
2018-10-30
2018-10-30
--
Progressive aridification in East Africa over the last half million years and implications for human evolution
Evidence for Quaternary climate change in East Africa has been derived from outcrops on land and lake cores and from marine dust, leaf wax, and pollen records. These data have previously been used to evaluate the impact of climate change on hominin evolution, but correlations have proved to be difficult, given poor data continuity and the great distances between marine cores and terrestrial basins where fossil evidence is located. Here, we present continental coring evidence for progressive aridification since about 575 thousand years before present (ka), based on Lake Magadi (Kenya) sediments. This long-term drying trend was interrupted by many wet-dry cycles, with the greatest variability developing during times of high eccentricity-modulated precession. Intense aridification apparent in the Magadi record took place between 525 and 400 ka, with relatively persistent arid conditions after 350 ka and through to the present. Arid conditions in the Magadi Basin coincide with the Mid-Brunhes Event and overlap with mammalian extinctions in the South Kenya Rift between 500 and 400 ka. The 525 to 400 ka arid phase developed in the South Kenya Rift between the period when the last Acheulean tools are reported (at about 500 ka) and before the appearance of Middle Stone Age artifacts (by about 320 ka). Our data suggest that increasing Middle- to Late-Pleistocene aridification and environmental variability may have been drivers in the physical and cultural evolution of Homo sapiens in East Africa.
Proceedings of the National Academy of Sciences of the United States of America
10.1073/pnas.1801357115
30297412
0027-8424
1091-6490
wos:2018
WOS:000448713200039
Owen, RB (reprint author), Hong Kong Baptist Univ, Dept Geog, Kowloon Tong, Hong Kong, Peoples R China., owen@hkbu.edu.hk
Lac-Core; National Oil Corporation of Kenya; Tata Chemicals; County Government of Kajiado; Hong Kong Research Grants CouncilHong Kong Research Grants Council [HKBU201912]; ICDP; US National Science FoundationNational Science Foundation (NSF) [EAR-1338553]; Ministry of Science and Technology of Taiwan Republic of China [107L901001, MOST107-2119-M-002-051]
2021-07-20T06:59:19+00:00
sword
importub
filename=package.tar
c6a0492d0fbf4bb61180d8680a3302ee
false
true
Richard Bernhart Owen
Veronica M. Muiruri
Tim K. Lowenstein
Robin W. Renaut
Nathan Rabideaux
Shangde Luo
Alan L. Deino
Mark J. Sier
Guillaume Dupont-Nivet
Emma P. McNulty
Kennie Leet
Andrew Cohen
Christopher Campisano
Daniel Deocampo
Chuan-Chou Shen
Anne Billingsley
Anthony Mbuthia
eng
uncontrolled
Quaternary
eng
uncontrolled
paleoclimate
eng
uncontrolled
paleolimnology
eng
uncontrolled
hominins
eng
uncontrolled
Lake Magadi
Geowissenschaften
Institut für Geowissenschaften
Import
41249
2016
2019
eng
16
611
postprint
1
2019-02-15
2019-02-15
--
The Hominin Sites and Paleolakes Drilling Project
The role that climate and environmental history may have played in influencing human evolution has been the focus of considerable interest and controversy among paleoanthropologists for decades. Prior attempts to understand the environmental history side of this equation have centered around the study of outcrop sediments and fossils adjacent to where fossil hominins (ancestors or close relatives of modern humans) are found, or from the study of deep sea drill cores. However, outcrop sediments are often highly weathered and thus are unsuitable for some types of paleoclimatic records, and deep sea core records come from long distances away from the actual fossil and stone tool remains. The Hominin Sites and Paleolakes Drilling Project (HSPDP) was developed to address these issues. The project has focused its efforts on the eastern African Rift Valley, where much of the evidence for early hominins has been recovered. We have collected about 2 km of sediment drill core from six basins in Kenya and Ethiopia, in lake deposits immediately adjacent to important fossil hominin and archaeological sites. Collectively these cores cover in time many of the key transitions and critical intervals in human evolutionary history over the last 4 Ma, such as the earliest stone tools, the origin of our own genus Homo, and the earliest anatomically modern Homo sapiens. Here we document the initial field, physical property, and core description results of the 2012-2014 HSPDP coring campaign.
Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
inferring the environmental context of human evolution from eastern African rift lake deposits
10.25932/publishup-41249
urn:nbn:de:kobv:517-opus4-412498
online registration
false
true
CC-BY - Namensnennung 4.0 International
Abby Cohen
Christopher Campisano
J. Ramon Arrowsmith
Asfawossen Asrat
A. K. Behrensmeyer
A. Deino
C. Feibel
A. Hill
R. Johnson
J. Kingston
Henry F. Lamb
T. Lowenstein
A. Noren
D. Olago
Richard Bernhart Owen
R. Potts
Kate Reed
R. Renaut
F. Schäbitz
J.-J. Tiercelin
Martin H. Trauth
J. Wynn
S. Ivory
K. Brady
R. O’Grady
J. Rodysill
J. Githiri
Joellen Russell
Verena Foerster
René Dommain
J. S. Rucina
D. Deocampo
J. Russell
A. Billingsley
C. Beck
G. Dorenbeck
L. Dullo
D. Feary
D. Garello
R. Gromig
T. Johnson
Annett Junginger
M. Karanja
E. Kimburi
A. Mbuthia
Tannis McCartney
E. McNulty
V. Muiruri
E. Nambiro
E. W. Negash
D. Njagi
J. N. Wilson
N. Rabideaux
Timothy Raub
Mark Jan Sier
P. Smith
J. Urban
M. Warren
M. Yadeta
Chad Yost
B. Zinaye
Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
611
eng
uncontrolled
Turkana-Basin
eng
uncontrolled
Adar formation
eng
uncontrolled
climate-change
eng
uncontrolled
olorgesailie formation
eng
uncontrolled
Southern Ethiopia
eng
uncontrolled
global climate
eng
uncontrolled
Kenya Rift
eng
uncontrolled
Pleistocene
eng
uncontrolled
variability
eng
uncontrolled
patterns
Geowissenschaften
open_access
Mathematisch-Naturwissenschaftliche Fakultät
Referiert
Open Access
Copernicus
Universität Potsdam
https://publishup.uni-potsdam.de/files/41249/pmnr611.pdf