Coc Muoi
Basic information
Sample name: Coc Muoi
Reference: A.-M. Bacon, P.-O. Antoine, T. M. H. Nguyen, K. Westaway, A. T. Nguyen, P. Duringer, J.-X. Zhao, J.-L. Ponche, C. D. Sam, H. N. Truong, T. M. Tran, T. S. Pham, M. Boyon, T. K. T. Nguyen, Blin, and Demeter. 2018. A rhinocerotid-dominated megafauna at the MIS6-5 transition: The late Middle Pleistocene Coc Muoi assemblage, Lang Son province, Vietnam. Quaternary Science Reviews 186:123-141 [ER 3863]
Geography
Country: Vietnam
State: Lan Son
Coordinate: 22° 21' 22" N, 106° 26' 6" E
Coordinate basis: stated in text
Time interval: Middle Pleistocene
Max Ma: 0.148
Min Ma: 0.117
Age basis: other
Geography comments: "close to the Chinese border 155 km NNE from Hanoi... 10 km north from the main town That Khé"
"two sediment samples" were dated by OSL and the "capping flowstone" was also dated by U-series, providing a minimum that isn't directly relevant but is consistent with the OSL results
"post- infrared infrared-stimulated luminescence (pIR-IRSL)" was also applied to the same sediment samples
the single-grain OSL dates are 117 +/- 27 and 125 +/- 26 ka and the pIR-IRSL dates are 148 +/- 13 and 146 +/- 12 ka, so the authors accept a range of 117 to 148 ka
"two sediment samples" were dated by OSL and the "capping flowstone" was also dated by U-series, providing a minimum that isn't directly relevant but is consistent with the OSL results
"post- infrared infrared-stimulated luminescence (pIR-IRSL)" was also applied to the same sediment samples
the single-grain OSL dates are 117 +/- 27 and 125 +/- 26 ka and the pIR-IRSL dates are 148 +/- 13 and 146 +/- 12 ka, so the authors accept a range of 117 to 148 ka
Environment
Lithology: breccia
Taphonomic context: cave,rodent accumulation
Habitat comments: "a solid brown to light brown sandy/clayey breccia unit... All fossils were discovered in the sediment below" the "older flowstone" and "water and sediment entered the cave, bringing the sediment and vertebrate remains studied in this paper"
"The majority of the damage observed are breakage on crowns and roots, and gnawed marks on roots... consistent with gnawing by porcupines" so the assemblage is interpreted as a rodent accumulation
no human artefacts are present
"The majority of the damage observed are breakage on crowns and roots, and gnawed marks on roots... consistent with gnawing by porcupines" so the assemblage is interpreted as a rodent accumulation
no human artefacts are present
Methods
Life forms: carnivores,primates,rodents,ungulates
Sampling methods: quarry
Sample size: 1295 specimens
Sampling comments: exact collection methods aren't indicated, but "excavation" was carried out
Metadata
Sample number: 4238
Contributor: John Alroy
Enterer: John Alroy
Created: 2023-04-21 09:14:31
Modified: 2023-04-20 23:14:31
Abundance distribution
30 species
3 singletons
total count 1295
geometric series index: 37.9
Fisher's α: 5.486
geometric series k: 0.8177
Hurlbert's PIE: 0.8531
Shannon's H: 2.3350
Good's u: 0.9977
Each square represents a species. Square sizes are proportional to counts.
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Register
| Cervus unicolor | 152 | 100 kg grazer-browser |
| "Rusa unicolor" | ||
| Cervidae indet. | 16 | |
| medium-sized, plus 11 bovid or cervid | ||
| Muntiacus sp. | 161 | |
| Bos cf. sauveli | 83 | |
| Capricornis sp. | 24 | |
| Sus scrofa | 252 | 54 kg herbivore |
| Tapirus augustus | 5 | |
| "Megatapirus augustus" | ||
| Tapirus indicus | 3 | |
| plus three indeterminate tapirids | ||
| Rhinoceros sondaicus | 343 | |
| Rhinoceros cf. unicornis | 6 | grazer-browser |
| Dicerorhinus sumatrensis | 20 | |
| plus one indeterminate rhinocerotid | ||
| Elephas maximus | 22 | 3711 kg grazer-browser |
| Stegodon sp. | 6 | |
| Cuon alpinus | 5 | 14 kg carnivore |
| Martes sp. | 1 | |
| Paradoxurus sp. | 1 | |
| Melinae indet. 1 | 4 | |
| large-sized | ||
| Melinae indet. 2 | 7 | |
| small-sized | ||
| Felidae indet. 1 | 4 | |
| small-sized | ||
| Felidae indet. 2 | 3 | |
| small-sized | ||
| Panthera tigris | 7 | 168 kg carnivore |
| Helarctos cf. malayanus | 3 | 32 kg frugivore-insectivore |
| Ursus thibetanus | 17 | 63 kg browser-frugivore |
| plus 11 indeterminate Ursus | ||
| Ailuropoda melanoleuca fovealis | 9 | 96 kg browser |
| Pongo sp. | 25 | |
| Macaca sp. | 23 | |
| Colobinae indet. | 13 | |
| Hylobates sp. | 1 | |
| Hystrix sp. | 73 | |
| Atherurus sp. | 6 | |