Enkapune Ya Muto (RBL2.1)
Basic information
Sample name: Enkapune Ya Muto (RBL2.1)

Sample aka: Twilight Cave

Reference: C. W. Marean. 1992. Hunter to herder: large mammal remains from the hunter-gatherer occupation at Enkapune Ya Muto rock-shelter, Central Rift, Kenya. The African Archaeological Review 10(1):65-127 [ER 3705]
Geography
Country: Kenya

Coordinate: 1° 50' S, 36° 9' E
Latlng basis: stated in text

Time interval: Holocene

Section: 3705

Unit number: 2

Unit order: above to below

Max Ma: 0.00486

Min Ma: 0.00339

Age basis: radiocarbon (uncalibrated)

Geography comments: "Enkapune Ya Muto (EYM), also known as Twilight Cave, is a large enclosed rock-shelter located on a steep slope in a large incised gully on the eastern face of the Mau Escarpment above the Naivasha basin in the Central Rift Valley of Kenya".
Radiocarbon dates for the RBL2.1 layers range from 4860 ± 70 BP to 3390 ± 185 BP.

Environment
Lithology: ash

Taphonomic context: human accumulation, rock shelter

Archaeology: ceramics, stone tools

Habitat comments: "The Mau Escarpment is mostly formed of volcanic ashes and tufts with occasional outcrops of agglomerates and more heavily consolidated lavas. The stratigraphy was complex but the layers were typically distinct and horizontal".
"The six major EYM aggregates preserve various forms of evidence inconsistent with accumulations by porcupines and carnivores, indicating persistent occupation of the shelter by people".
Human accumulation of the remains is "further substantiated by the density of artefacts and the high frequencies of cutmarks on the bones". Stone tools of the Eburran industry, "characterized by geometric and non-geometric microliths produced from narrow blades of obsidian", are present, along with Salasun, Nderit, and Ileret ceramics.

Methods
Life forms: carnivores, primates, rodents, ungulates, other large mammals

Sampling methods: quarry

Sample size: 326 specimens

Net or trap nights: 0

Basal area status: not applicable

Sampling comments: "The site was excavated during the two field seasons in 18 1-m squares, placed primarily in the northern section of the rock-shelter. The depth of the deposits, over 5 m, along with a rock shelf warranted reduction of the area excavated in the deeper deposits".

Metadata
Sample no: 3915

Contributor no: Benjamin Carter

Enterer: Benjamin Carter

Created: 2022-03-07 13:03:59

Modified: 2023-05-29 23:33:32

Abundance distribution
Each square represents a species. Square sizes are proportional to counts. Values are logged.
Statistics
22 species
6 singletons
total count 326
geometric series index: 36.9
Fisher's α: 5.326
geometric series k: 0.7984
Hurlbert's PIE: 0.8122
Shannon's H: 2.1317
Good's u: 0.9816
Register
Aepyceros melampus (impala)151.0 kg
Alcelaphus buselaphus (hartebeest)6
Caprinae indet.8
"sheep" or "goat"
Hylochoerus meinertzhageni (giant forest hog)1
Ourebia ourebi (oribi)814.0 kg
Phacochoerus aethiopicus (desert warthog)165.0 kg
Potamochoerus porcus (red river hog)166.0 kg
also 10 Suidae indet.
Raphicerus campestris (steenbok)39.7 kg
Redunca sp. 55
"bohor/mountain reedbuck"
Sylvicapra grimmia (common duiker)5513.0 kg
Syncerus caffer (African buffalo)1548.0 kg
Tragelaphus scriptus (harnessed bushbuck)11331.0 kg
also 3778 Bovidae indet.
Canis mesomelas (black-backed jackal)27.9 kg
Crocuta crocuta (spotted hyena)1066.0 kg
Felis lybica (African wildcat)24.5 kg
Leptailurus serval (serval)20
"Felis serval"
Mellivora capensis (honey badger)47.7 kg
Panthera pardus (leopard)1
Chlorocebus aethiops (grivet)5
"Cercopithecus aethiops"
Papio sp. 3
Procaviidae indet.13
Thryonomys gregorianus 132.2 kg