Santa Marta rock-shelter
Basic information
Sample name: Santa Marta rock-shelter
Reference: G. Acosta, L. E. Beramendi, G. Gonzâlez, I. Rivera, I. Eudave, E. Hernândez, S. Sânchez, P. Morales, E. Cienfuegos, and F. Otero. 2018. Climate change and peopling of the Neotropics during the Pleistocene-Holocene transition. BoletÃn de la Sociedad Geológica Mexicana 70(1):1-19 [ER 3801]
Geography
Country: Mexico
State: Chiapas
Coordinate: 16° 39' N, 93° 44' W
Coordinate basis: based on nearby landmark
Time interval: Holocene
Max Ma: 0.010055
Min Ma: 0.00874
Age basis: radiocarbon (uncalibrated)
Geography comments: no geographic information is given at all, but apparently from the municipality of Ocozocoautla; I am assuming it is near the town of Santa Marta immediately to the west of the municipality (basis of coordinate)
there are seven uncalibrated 14C dates from Layer XVI ranging from 8740 +/- 50 to 10055 +/- 90 BP
there are seven uncalibrated 14C dates from Layer XVI ranging from 8740 +/- 50 to 10055 +/- 90 BP
Environment
Lithology: sandstone
Taphonomic context: aeolian deposit,human accumulation,rock shelter
Archaeology: stone tools
Habitat comments: sediments are apparently "of eolic origin"
"clay content is low (2%) whereas the most abundant fraction is sand (69%) followed by silt (29%)"
"Most of the materials show signs of thermal processing, butchering marks, and dismembering, all associated with the consumption as food"
there are stone tools throughout the sequence but they are not described in detail
"clay content is low (2%) whereas the most abundant fraction is sand (69%) followed by silt (29%)"
"Most of the materials show signs of thermal processing, butchering marks, and dismembering, all associated with the consumption as food"
there are stone tools throughout the sequence but they are not described in detail
Methods
Life forms: carnivores,rodents,ungulates,other large mammals,other small mammals,birds,snakes,turtles,frogs,clams
Sampling methods: quarry
Sample size: 307 specimens
Years: 2004
Sampling comments: the snail Pachychilus sp. was very abundant but was not counted out
seeds and pollen were also studied
seeds and pollen were also studied
Metadata
Sample number: 4154
Contributor: John Alroy
Enterer: John Alroy
Created: 2023-03-08 22:05:22
Modified: 2023-03-08 11:05:22
Abundance distribution
18 species
3 singletons
total count 307
geometric series index: 26.2
Fisher's α: 4.175
geometric series k: 0.7733
Hurlbert's PIE: 0.8440
Shannon's H: 2.1798
Good's u: 0.9903
Each square represents a species. Square sizes are proportional to counts.
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Register
| Unio sp. | 1 | |
| Anura indet. | 10 | |
| Crotalus sp. | 32 | |
| also 47 "snakes" | ||
| Kinosternon acutum | 40 | |
| Anatidae indet. | 1 | |
| Aythya or Anas | ||
| Ortalis vetula | 2 | 584 g granivore-frugivore |
| Liomys pictus | 5 | 48.7 g |
| Dasyprocta punctata | 8 | 2.7 kg frugivore |
| Sciurus sp. | 8 | |
| Dasypus novemcinctus | 69 | 4.4 kg invertivore |
| Sylvilagus floridanus | 23 | 1.1 kg herbivore |
| Lepus sp. | 4 | |
| Bassariscus sumichrasti | 2 | |
| Canis sp. | 1 | |
| Urocyon cinereoargenteus | 2 | 4.1 kg frugivore-carnivore |
| Dicotyles tajacu | 7 | 21 kg browser |
| plus 29 indeterminate artiodactyls | ||
| Odocoileus virginianus | 79 | 75 kg herbivore |
| plus 120 indeterminate cervids | ||
| Mazama americana | 13 | 26 kg frugivore-browser |