Share This Author
Geochronology and thermochronology by the Ar/Ar method
1. Historical introduction 2. Basis of the 40AR/39AR dating method 3. Technical aspects 4. 40AR/39AR data presentation and interpretation App.4.1 Isochron analysis 5. Diffusion theory and…
Stratigraphic context of fossil hominids from the Omo group deposits: northern Turkana Basin, Kenya and Ethiopia.
- C. Feibel, F. Brown, I. Mcdougall
- Geology, GeographyAmerican Journal of Physical Anthropology
- 1 April 1989
The chronometric framework developed for Plio-Pleistocene deposits of the northern Turkana Basin is reviewed in light of recent advances in lithostratigraphy, geochemical correlation, paleomagnetic…
New four-million-year-old hominid species from Kanapoi and Allia Bay, Kenya
The mosaic of primitive and derived features shows this species to be a possible ancestor to Australopithecus afarensis and suggests that Ardipithecus ramidus is a sister species to this and all later hominids.
Characterization and calibration of 40Ar/39Ar dating standards
Implications of new early Homo fossils from Ileret, east of Lake Turkana, Kenya
Two new cranial fossils from the Koobi Fora Formation, east of Lake Turkana in Kenya, are described that have bearing on the relationship between species of early Homo and confirm the distinctiveness of H.’shabilis and H.erectus, independently of overall cranial size, and suggest that these two early taxa were living broadly sympatrically in the same lake basin for almost half a million years.
Diffusion of 40Ar in biotite: Temperature, pressure and compositional effects
Stratigraphic placement and age of modern humans from Kibish, Ethiopia
The preferred estimate of the age of the Kibish hominids is 195 ± 5 kyr, making them the earliest well-dated anatomically modern humans yet described, and close to the older limit of Mediterranean sapropels.
New hominin genus from eastern Africa shows diverse middle Pliocene lineages
New fossils discovered west of Lake Turkana, Kenya, which differ markedly from those of contemporary A. afarensis point to an early diet-driven adaptive radiation, provide new insight on the association of hominin craniodental features, and have implications for the understanding of Plio–Pleistocene hom inin phylogeny.
Origin and evolution of Lord Howe Island, Southwest Pacific Ocean
Abstract Lord Howe Island is the eroded remnant of a large shield volcano. Tholeiitic lavas of the North Ridge Basalt comprise the main shield building phase and were erupted about 6.9 Ma ago. The…