Results 201 to 210 of about 175,013 (252)

Plio-Pleistocene decline of African megaherbivores: No evidence for ancient hominin impacts

Science, 2018
Megaherbivore extinctions in Africa Human ancestors have been proposed as drivers of extinctions of Africa's diverse large mammal communities. Faith et al. challenge this view with an analysis of eastern African herbivore communities spanning the past ∼7
J. Faith, John Rowan, A. Du, Paul L. Koch   +3 more
semanticscholar   +1 more source

Fission track dating applied to the plio-pleistocene

Nuclear Tracks, 1981
ABSTRACT Mammal deposits of the plio-pleistocene French Massif Central have been dated by the fission track method using sphene, apatite and zircon minerals. The results confirm a greater volcanic activity registered during the pliocene period. The Massif Central volcanic history is investigated.
A. Chambaudet, J. Couthures
openaire   +1 more source

Plio—Pleistocene hominid discoveries in Hadar, Ethiopia

Nature, 1976
The International Afar Research Expedition has now recovered remains of twelve hominid individuals from geological deposits estimated to be ∼ 3.0 Myr in Hadar, Ethiopia. A partial skeleton represents the most complete hominid known from this period. The collection suggests that Homo and Australopithecus coexisted as early as 3.0 Myr ago.
D C, Johanson, M, Taieb
openaire   +2 more sources

Paleocene-Eocene and Plio-Pleistocene sea-level changes as "species pumps" in Southeast Asia: Evidence from Althepus spiders.

Molecular Phylogenetics and Evolution, 2018
Sea-level change has been viewed as a primary driver in the formation of biodiversity. Early studies confirmed that Plio-Pleistocene sea-level changes led to the isolation and subsequent genetic differentiation of Southeast (SE) Asian organisms over ...
Fengyuan Li, Shuqiang Li
semanticscholar   +1 more source

Seismically induced soft-sediment deformation structures in an active seismogenic setting: The Plio-Pleistocene Karewa deposits, Kashmir Basin (NW Himalaya)

Journal of Structural Geology, 2018
Recent uplift in the NW Himalaya has exposed more than 1000 m of the Plio-Pleistocene so-called Karewa deposits in Kashmir. These deposits mostly consist of horizontal-stratified sand, silt, clay, conglomerates, and lignite beds.
Umair Ali, Syed Ahmad Ali
semanticscholar   +1 more source

Plio-Pleistocene calcareous plankton biochronology

Marine Micropaleontology, 1989
Abstract A reliability assessment of 20 commonly employed Late Pliocene and Pleistocene calcareous plankton biostratigraphic datums published for 30 DSDP holes has revealed a subset of ten which appear to be reasonably isochronous and consistently recognizable by a large number of biostratigraphers.
Scott J. Hills, Hans R. Thierstein
openaire   +1 more source

Variations in Plio-Pleistocene Deposition in the Red Sea

2018
The thickness of deep-water Plio-Pleistocene (PP) sediments in the Red Sea varies somewhat, as expected from increased biogenic pelagic production rates in the south and with input of aeolian and fluvial sediments through the Tokar Gap in the Sudanese hills.
Mitchell, Neil C, Ligi, Marco, Rasul, Najeeb MA   +5 more
openaire   +1 more source

Reconstructing atmospheric CO2 during the Plio–Pleistocene transition by fossil Typha

Global Change Biology, 2015
Li-Qun Chen, Yu-Fei Wang, Cheng-Sen Li   +2 more
exaly   +2 more sources

Paleotemperature Variations across the Plio-Pleistocene Boundary

Science, 1971
Strong variations in the O 18 /O 16 and C 13 /C 12 ratios occur through the type section for the Plio-Pleistocene boundary, but the boundary itself is not characterized by unusual isotopic gradients.
openaire   +2 more sources

Femoral lengths and stature in Plio‐Pleistocene hominids

American Journal of Physical Anthropology, 1991
AbstractThis study reports the femoral lengths of 31 Plio‐Pleistocene hominids dated between 3.1 and 0.7 million years ago, and uses those lengths to estimate stature by way of the femur‐stature ratio reported by Feldesman et al. (Am. J. Phys. Anthropol. 78:219–220, 1989).
openaire   +2 more sources