Shum Laka rock shelter (Lower Horizon; ochre ash)
Basic information
Sample name: Shum Laka rock shelter (Lower Horizon; ochre ash)
Reference: P. Lavachery. 2001. The Holocene archaeological sequence of Shum Laka rock shelter (Grassfields, western Cameroon). African Archaeological Review 18(4):213-247 [ER 3768]
Geography
Country: Cameroon
State: Northwest
Coordinate: 5° 51' 31" N, 10° 4' 40" E
Coordinate basis: stated in text
Time interval: Holocene
Section: 3768
Unit number: 1
Unit order: below to above
Max Ma: 0.009095
Min Ma: 0.00848
Age basis: radiocarbon (uncalibrated)
Geography comments: "Shum Laka rock shelter is situated in the Northwest Province of Cameroon, some 17 km southwest of Bamenda, on the territory of Bafochu-Mbu village. It lies in a small gallery forest bordered by savanna, some 1600 m asl".
"Radiocarbon dates for the Lower Horizon of the ochre ash layer range between 9095 and 8480 B.P. (8500–7000 cal. BC)".
"Radiocarbon dates for the Lower Horizon of the ochre ash layer range between 9095 and 8480 B.P. (8500–7000 cal. BC)".
Environment
Lithology: ash
Taphonomic context: human accumulation,rock shelter
Archaeology: stone tools
Habitat comments: "Shum Laka rock shelter covers a surface area of 1200 m2 and contains three main stratigraphic units. The Holocene deposits consist mainly of anthropogenic ashes known as the “A” layer: a lens-shaped mantle that dips from the back to the opening of the cave. It is divided into two members: the ochre ash layer and the gray ash layer".
The only artefacts collected from the Lower Horizon of the ochre ash layer are stone tools. "Of the part of the industry studied, more than 65% is on quartz. Flaking methods are unspecialized and the flake component, whatever the raw material, is very poor. Almost all of the assemblage is of microlithic proportions (less than 3 cm)".
The only artefacts collected from the Lower Horizon of the ochre ash layer are stone tools. "Of the part of the industry studied, more than 65% is on quartz. Flaking methods are unspecialized and the flake component, whatever the raw material, is very poor. Almost all of the assemblage is of microlithic proportions (less than 3 cm)".
Methods
Life forms: carnivores,primates,rodents,ungulates,snails
Sampling methods: quarry
Sample size: 26 specimens
Sampling comments: "A total of 82 m2 of the rock shelter was excavated, opened in two main areas: Sector 1 (in the centre and back of the shelter) and Sector 2 (closer to the entrance). Because of a lack of any finer exploitable stratigraphical features in the very loose ash layers, the excavation proceeded by artificial horizontal spits. In total, the excavations recovered half a million stone artifacts, over 1200 pottery sherds, 18 human skeletons, and thousands of faunal and plant remains".
Metadata
Sample number: 4035
Contributor: Benjamin Carter
Enterer: Benjamin Carter
Created: 2022-10-28 11:50:43
Modified: 2023-05-30 03:09:37
Abundance distribution
7 species
4 singletons
total count 26
extrapolated richness: 21.3
Fisher's α: 3.143
geometric series k: 0.6706
Hurlbert's PIE: 0.6769
Shannon's H: 1.4297
Good's u: 0.8492
Each square represents a species. Square sizes are proportional to counts.
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