Maka'amitalu (A.L. 666)
Basic information
Sample name: Maka'amitalu (A.L. 666)

Reference: J. Rowan, I. A. Lazagabaster, C. J. Campisano, F. Bibi, R. Bobe, J.-R. Boisserie, S. R. Frost, T. Getachew, C. C. Gilbert, M. E. Lewis, S. Melaku, E. Scott, A. Souron, L. Werdelin, W. H. Kimbel, and K. E. Reed. 2022. Early Pleistocene large mammals from Maka'amitalu, Hadar, lower Awash Valley, Ethiopia. PeerJ 10(e13210):1-50 [ER 3955]
Geography
Country: Ethiopia


Coordinate: 11.153° N, 40.554° E
Coordinate basis: estimated from map

Formation: Busidima

Time interval: Early Pleistocene

Max Ma: 2.4

Min Ma: 2.35

Age basis: other

Geography comments: "from the Maka'amitalu area at Hadar... a small basin of exposures... within a spatially restricted area of ~1 km2 with a stratigraphic thickness of ~18 m"
almost immediately east of Qaddaqaara and the Ada'ar Health Center based on Fig. 2
"Considering the age of BKT-3 and biochronology, a range of 2.4–1.9 Ma is most likely for the faunal assemblage"
"Tuff 3 (BKT-3)... lies just above the A.L. 666 and A.L. 894" sites and was dated at 2.33 +/- 0.07 Ma "using plagioclase feldspars" and this was "recalculated to 2.35 +/- 0.07 Ma" following recalibration of the 40Ar/39Ar standard
age bracket is therefore 2.4 Ma based on biochronology and 2.35 Ma based on the tuff

Environment
Lithology: siltstone

Taphonomic context: fluvial deposit

Archaeology: stone tools

Habitat comments: "a high-energy fluvial system... dominated by overbank deposits of silts and clayey-silts without discrete fossiliferous horizons"
"Oldowan stone tool assemblages" are present and described in earlier literature
there is no specific discussion of taphonomy or accumulation agents

Methods
Life forms: primates,ungulates

Sampling methods: quarry

Sample size: 21 specimens

Sampling comments: fossils at this exact site were "recovered in situ from excavations"

Metadata
Sample number: 4364

Contributor: John Alroy

Enterer: John Alroy

Created: 2023-08-31 21:25:55

Modified: 2023-08-31 11:29:52

Abundance distribution
7 species
3 singletons
total count 21
extrapolated richness: 17.1
Fisher's α: 3.677
geometric series k: 0.7230
Hurlbert's PIE: 0.7595
Shannon's H: 1.6610
Good's u: 0.8618
Each square represents a species. Square sizes are proportional to counts.
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