Also known as ETE Locality 1417, Peninj-Middle Zone,

Where: Lake Natron Basin, Tanzania (2.3° S, 36.0° E: paleocoordinates 2.4° S, 35.9° E)

When: Middle Zone Member (Humbu Formation), Calabrian (1.8 - 0.8 Ma)

• ETE dating method: absolute, ETE age comment: Was-Mbugu olivine basalt smpls(1964&1969 Isaac) radiometric intage_max, radiometric intage_min

•Was originally under Hubu Formation. Base of formation is about ~1.75Ma, the Main Tuff is ~1.19+/-0.03Ma. The top of the Peninj Group is about 1.01+/-0.03Ma, therefore, the upper dsands are ~1.2-1.1Ma (Deino et al. 2006)

Environment/lithology: lacustrine; tuff

Size class: macrofossils

Collection methods: surface (in situ)

• ETE Size: both; ETE reference list: 478, ; ETE museum list:

Primary reference: G. Isaac. 1965. The stratigraphy of the Peninj beds and the provenance of the Natron australopithecine mandible. Quaternaria 7:101-130 [A. Behrensmeyer/A. Behrensmeyer/M. Kosnik]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 22577: authorized by Anna Behrensmeyer, entered by Anna Behrensmeyer on 28.06.2000, edited by John Damuth

Creative Commons license: CC BY (attribution)