Publikationsdatum:
2011-06-03
Beschreibung:
Publication year: 2011 Source: Quaternary Research, In Press, Corrected Proof, Available online 2 June 2011 R.B., Owen , R.W., Renaut , R., Potts , A.K., Behrensmeyer The Olorgesailie Formation (1.2–0.49Ma) consists of fluvial and lacustrine rift sediments that have yielded abundant Acheulean artifacts and a fossil hominin (Homo cf. erectus). In testing prior understandings of the paleoenvironmental context, we define nine new geochemical zones. A Chemical Index of Alteration suggests increased catchment weathering during deposition of Members 1, 2, 7, 11, and 13. Biophile elements (Br, S) peak in M8–9 and lower M13 possibly reflecting increased input from soil erosion. REE data show that the Magadi Trachytes supplied most siliciclastic grains. Sixteen diatom stages indicate conductivities of 200–16,000μScm−1 and pH of 7.5–9.5 for five deep-water lakes,...
Print ISSN:
0033-5894
Digitale ISSN:
1096-0287
Thema:
Geographie
,
Geologie und Paläontologie
