Gademotta

Gademotta Formation a cikin Main Ethiopian Rift Valley an san shi da wuraren binciken archaeological na Middle Stone Age. Tana yammacin Tafkin Ziway . Baya ga nau'in shafin, wanda ke ɗaukar sunan iri ɗaya, tsarin ya ƙunshi tarin shafuka a Kulkuletti, kimanin kilomita 2.5 (1.6 daga nesa. Yanayin kusa da tafkin da kuma lobsidian da ke cikin gida na iya jan hankalin ci gaba / maimaitawa na yankin ta hanyar Middle da Late Pleistocene hominins.

Gademotta Formation site-complex an gano shi ne a farkon shekarun 1970 ta ƙungiyar masu bincike a ƙarƙashin jagorancin Fred Wendorf da Romuald Schild .  Wannan ƙungiyar ta gudanar da tonowa da yawa a cikin 1972 da 1973, inda ta dawo da dubban kayan tarihi na dutse. Sabunta bincike a cikin Gademotta Formation an ƙarfafa shi ta hanyar sabbin dabarun da suka ba da damar ingantaccen 40Ar / 39Ar [bayyanawa da ake buƙata] shekarun shafin da aka buga a cikin 2008.  

An buga shekaru sama da 279,000 don shafin yanar gizon Tsohon Tsakiyar Tsakiya a cikin Formation . Morgan, LE; Renne, PR (2008). "Diachronous dawn for Africa's Middle Stone Age: new 40Ar/39Ar ages from the Ethiopian Rift". Geology. 36 (12): 967–970. Bibcode:2008Geo....36..967M. doi:10.1130/g25213a.1. Kodayake irin wannan shekarun ne tare da tsohuwar shafin Middle Stone Age a cikin Kapthurin Formation, Kenya,  tsohuwar sana'a a Gademotta tana da fasahar fasahar da ke da alaƙa da Zamanin Stone na Tsakiya. An yi nazarin mashi da aka jefa a kan dutse na wannan shekarun.

 Bayanan da aka ambata