Blombos Cave (Phase M2)
Basic information
Sample name: Blombos Cave (Phase M2)

Reference: C. S. Henshilwood, J. C. Sealy, R. Yates, K. Cruz-Uribe, P. Goldberg, F. E. Grine, R. G. Klein, C. Poggenpoel, K. van Niekerk, and I. Watts. 2001. Blombos Cave, Southern Cape, South Africa: Preliminary report on the 1992-1999 excavations of the Middle Stone Age levels. Journal of Archaeological Science 28(4):421-448 [ER 3719]
Geography
Country: South Africa

State: Western Cape



Coordinate: 34° 25' S, 21° 13' E
Coordinate basis: stated in text

Time interval: Late Pleistocene

Section: 3719

Unit number: 3

Unit order: above to below

Max Ma: 0.0846

Min Ma: 0.0768

Age basis: OSL

Geography comments: "Blombos Cave is a limestone cave situated in the Blombosfontein Nature Reserve on the south coast of the Western Cape Province of South Africa, some 100 m from the Indian Ocean and approximately 300 km east of Cape Town".
"The M2 phase has been dated by OSL to between 84.6 ± 5.8 ka and 76.8 ± 3.1 ka".

Environment
Lithology: sandstone

Taphonomic context: cave,human accumulation

Archaeology: bone tools,hearths,stone tools

Habitat comments: "The cave was formed as a result of solution action and wave cutting of a cliff formed of calcified sediments that lies above a basal layer of Table Mountain Sandstone".
The site consists of three major Middle Stone Age layers (Phases M1-M3) beneath a thick, sterile aeolian sand dune layer that separates the Middle Stone Age (MSA) sequence from the recent Late Stone Age (LSA) layers.
"Most of the MSA deposits are finely bedded to laminated, with cm thick bedding. Phase M2 is a medium brown sand with a low density of shell, stone and bone. Large hearths lie within the dense shelly layer near the shelter entrance".
Various stone stools are present including flakes, cores, retouched pieces, and bifacial points. The upper part of this phase contains most of the bone tools, probably used as awls and projectile points".
"The abundance of artefacts strongly implicates humans as the principle bone accumulators".

Methods
Life forms: carnivores,rodents,ungulates,marine mammals,other large mammals,other small mammals,fishes

Sampling methods: quarry,screenwash

Sample size: 643 specimens

Years: 1992 -

Sampling comments: "The first excavation at Blombos Cave was initiated in 1991 and led to the recovery of only the LSA deposits dated at less than 2 ka old. A second excavation was begun in 1992, with excavations of both the LSA and MSA levels continuing in 1997, 1998, 1999, 2000" and beyond...
"Within the cave interior, behind the drip line, a surface area of 12·5 m2 of MSA deposits has been excavated (as of 2000); forward of the drip line a test trench of 3 m2 was excavated in 1999. Excavation by brush or trowel followed individual strata or layers".
"Recovered deposits were wet sieved through both 1·5 and 3·0 mm meshes using seawater. Recovered material was later re-washed in freshwater and shade dried".
The register below consists of the identified macromammal remains only (those with a mean adult body weight of at least 0.75 kg). Smaller micromammals are also present (along with several other groups), although raw NISP counts are not provided, not even in the follow-up small mammal dedicated publications.

Metadata
Sample number: 3944

Contributor: Benjamin Carter

Enterer: Benjamin Carter

Created: 2022-04-02 14:27:33

Modified: 2023-05-30 00:53:25

Abundance distribution
26 species
8 singletons
total count 643
geometric series index: 47.6
Fisher's α: 5.438
geometric series k: 0.7957
Hurlbert's PIE: 0.6838
Shannon's H: 1.6480
Good's u: 0.9876
Each square represents a species. Square sizes are proportional to counts.
Register