The Geological, Isotopic, Botanical, Invertebrate, and Lower Vertebrate Surroundings of Ardipithecus ramidus | Zendy

Giday WoldeGabriel | Zendy; Stanley H. Ambrose | Zendy; Doris Barboni | Zendy; Raymonde Bonnefille | Zendy; Laurent Brémond | Zendy; Brian S. Currie | Zendy; David Degusta | Zendy; William K. Hart | Zendy; Alison M. Murray | Zendy; Paul R. Renne | Zendy; MarieClaude JollySaad | Zendy; Kathlyn M. Stewart | Zendy; Tim D. White | Zendy

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The Geological, Isotopic, Botanical, Invertebrate, and Lower Vertebrate Surroundings of Ardipithecus ramidus

Author(s) -

Giday WoldeGabriel,

Stanley H. Ambrose,

Doris Barboni,

Raymonde Bonnefille,

Laurent Brémond,

Brian S. Currie,

David Degusta,

William K. Hart,

Alison M. Murray,

Paul R. Renne,

MarieClaude JollySaad,

Kathlyn M. Stewart,

Tim D. White

Publication year - 2009

Publication title -

science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 12.556

H-Index - 1186

eISSN - 1095-9203

pISSN - 0036-8075

DOI - 10.1126/science.1175817

Subject(s) - taphonomy , geology , floodplain , paleontology , alluvium , vertebrate , volcano , invertebrate , fluvial , biotope , alluvial fan , ecology , biology , sedimentary rock , habitat , biochemistry , structural basin , gene

Sediments containing Ardipithecus ramidus were deposited 4.4 million years ago on an alluvial floodplain in Ethiopia's western Afar rift. The Lower Aramis Member hominid-bearing unit, now exposed across a > 9-kilometer structural arc, is sandwiched between two volcanic tuffs that have nearly identical 40Ar/39Ar ages. Geological data presented here, along with floral, invertebrate, and vertebrate paleontological and taphonomic evidence associated with the hominids, suggest that they occupied a wooded biotope over the western three-fourths of the paleotransect. Phytoliths and oxygen and carbon stable isotopes of pedogenic carbonates provide evidence of humid cool woodlands with a grassy substrate.

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