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SUMMARY:Geochronology of a major new Pleistocene sequence at Kilombe Kenya
 : from the Oldowan to Middle Stone Age - Dr. Sally Hoare\, University of L
 iverpool
DTSTART:20220304T163000Z
DTEND:20220304T173000Z
UID:TALK171278@talks.cam.ac.uk
CONTACT:106589
DESCRIPTION:_This talk reports a newly extended major stratigraphic sequen
 ce with associated Palaeolithic sites from the area of Kilombe in central 
 Kenya. The extended archaeological sequence runs from Oldowan finds\, thro
 ugh the Acheulean and up to the Middle Stone Age. The sedimentary sequence
 s within the Kilombe caldera and south flanks of the mountain have been da
 ted through 40Ar/39Ar measurements and palaeomagnetic studies. A series of
  40Ar/39Ar values date the geological sequence from 2.493   0.095 Ma\, n
 ear the beginning of the Lower Pleistocene\, through to 0.118  0.030 Ma ne
 ar the Middle to Upper Pleistocene transition. It includes the first entir
 ely new area of Oldowan localities in East Africa south of Ethiopia for th
 irty years\, and the first in a rugged mountainous setting. On the souther
 n outward flanks of Kilombe mountain\, a second major sequence is bounded 
 at the base by trachyphonolite and a tuff yielding dates in the range 1.58
 –1.50 Ma. The main Acheulean archaeological site (GqJh1) falls within th
 e overlying sedimentary sequence and has an age of c. 1.0 Ma\, on the basi
 s of a new 40Ar/39Ar date for the Three-Banded Tuff and palaeomagnetic rev
 ersal stratigraphy. Further 40Ar/39Ar dates indicate an age of c. 0.48–0
 .46 Ma for a marker ashflow tuff (AFT)\, prominent across the area. At Mor
 icho\, west of Kilombe\, sediments above the AFT have been dated in the ra
 nge 270\,000–120\,000 years and are associated with Middle Stone Age ass
 emblages. In total\, these sites attest to hominin activity from an Oldowa
 n horizon dated to 1.8 Ma up to Later Stone Age stone scatters within the 
 last 100\,000 years._\n\n*To receive a Zoom link please register "here":ht
 tps://cam-ac-uk.zoom.us/meeting/register/tJwvfuupqT4iGdT8qVeokY2hOG0FaCgIH
 viN *
LOCATION:McDonald Institute Seminar Room\, Department of Archaeology/Zoom
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