GNL Quintero 1
Basic information
Sample name: GNL Quintero 1
Sample aka: GNLQ1
Reference: P. López, I. Cartajena, D. Carabias, C. Morales, D. Letelier, and V. Flores. 2016. Terrestrial and maritime taphonomy: differential effects on spatial distribution of a Late Pleistocene continental drowned faunal bone assemblage from the Pacific coast of Chile. Archaeological and Anthropological Sciences 8:277-290 [ER 3415]
Geography
Country: Chile
State: Valparaíso
Coordinate: 32° 47' S, 71° 32' W
Coordinate basis: based on nearby landmark
Time interval: Late Pleistocene
Max Ma: 0.02489
Min Ma: 0.02158
Age basis: radiocarbon (uncalibrated)
Geography comments: "on Quintero Bay (32° S), 50 km north of Valparaíso... 650 m from the present-day coastline, at a depth of 13 m" under water, so originally a coastal setting
coordinate based on Quintero
six "skeletal elements and molars of various taxa were directly dated by the AMS-radiocarbon method using the bioapatite fraction and reported ages between 21.580 ± 60 and 24.890 ± 70 years not cal. BP"; there is a younger date of "13.640 ± 40 BP" on the sediment itself
coordinate based on Quintero
six "skeletal elements and molars of various taxa were directly dated by the AMS-radiocarbon method using the bioapatite fraction and reported ages between 21.580 ± 60 and 24.890 ± 70 years not cal. BP"; there is a younger date of "13.640 ± 40 BP" on the sediment itself
Environment
Lithology: claystone
Habitat comments: "a dense concentration of animal bone remains deposited in a consolidated and partially buried stratum under 5 to 10 cm of modern sands" and the bones are from the top of a "clay - gravel" layer that consists of "90% matrix (gray color)" and "10% agglomerated clasts"
the assemblage was "affected by hydraulic sorting" and "perforations and pitting" are "attributed to both large and small carnivores" but "the animals died at or near the site. The action of carnivores may have also had an impact" so this is not a carnivore accumulation per se
there are "two marks" that are potentially anthropogenic, but not certainly so
the assemblage was "affected by hydraulic sorting" and "perforations and pitting" are "attributed to both large and small carnivores" but "the animals died at or near the site. The action of carnivores may have also had an impact" so this is not a carnivore accumulation per se
there are "two marks" that are potentially anthropogenic, but not certainly so
Methods
Life forms: carnivores,rodents,ungulates,other large mammals,birds,fishes
Sampling methods: quarry
Sample size: 528 specimens
Years: 2007, 2012, 2013
Sampling comments: "discovered in 2005... subsurface test excavations were conducted and mechanical coring samples obtained at several targeted locations at the site in 2007... across transects within an area of 40 × 25 m. One locus with well-delimited bone concentrations barely visible on the seabed was selected and sampled through a test excavation 1 × 1 m unit, producing 224 specimens... New extensive excavations covering a total surface of 8 m2 were conducted at the site during 2012 and 2013. Despite the fact that bones were distributed in a continuum along the entire excavated area, 19 discrete bone concentrations were identified"
Metadata
Sample number: 3800
Contributor: John Alroy
Enterer: John Alroy
Created: 2021-06-10 21:47:02
Modified: 2021-06-10 11:47:02
Abundance distribution
10 species
2 singletons
total count 528
extrapolated richness: 14.4
Fisher's α: 1.751
geometric series k: 0.5231
Hurlbert's PIE: 0.5194
Shannon's H: 1.0531
Good's u: 0.9962
Each square represents a species. Square sizes are proportional to counts.
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Register
| Lama cf. gracilis | 1 | |
| Palaeolama sp. | 129 | |
| compared to this genus | ||
| Lycalopex culpaeus | 1 | 8.0 kg invertivore-carnivore |
| Octodontidae indet. | 22 | |
| Myocastor coypus | 8 | |
| Abrocoma sp. | 3 | |
| Equus (Amerhippus) sp. | 14 | |
| Mylodontidae indet. | 341 | |
| Osteichthyes indet. | 4 | |
| Aves indet. | 5 | |