Paso Otero (paleocauce)
Basic information
Sample name: Paso Otero (paleocauce)
Sample aka: Paso Otero 5
Reference: J. L. Prado, A. N. Menegaz, E. P. Tonni, and M. C. Salemme. 1987. Los mamiferos de la Fauna local Paso Otero (Pleistocene tardio), Provincia de Buenos Aires. Aspectos paleoambientales y bioestratigraficos. Ameghiniana 24(3-4):217-233 [ER 3399]
Geography
Country: Argentina
State: Buenos Aires
County: Necochea
Coordinate: 38° 34' S, 58° 42' W
Coordinate basis: stated in text
Formation: Lujân
Time interval: Pleistocene - Holocene
Section: 3399
Unit number: 3
Unit order: below to above
Max Ma: 0.01044
Min Ma: 0.00956
Age basis: radiocarbon (uncalibrated)
Geography comments: along the banks of the river Quequén Grande, Necochea County"
from the Guerrero Member
the "pardo" level underlies the "verde" level, and the "paleocauce" level presumably overlies both
thought by Prado et al. (1987) to be latest Pleistocene
Johnson et al. (2012) imply that Prado et al.'s entire fauna is from their Paso Otero 5
there are three rejected, uncalibrated, very young 14C dates and three accepted ones: 10,190 +/- 120 ybp on megamammal, 10,440 +/- 100 ybp on megamammal, and 9560 +/- 50 ybp based on Megatherium americanum; the oldest is unambiguously Pleistocene and the youngest is unambiguously Holocene
from the Guerrero Member
the "pardo" level underlies the "verde" level, and the "paleocauce" level presumably overlies both
thought by Prado et al. (1987) to be latest Pleistocene
Johnson et al. (2012) imply that Prado et al.'s entire fauna is from their Paso Otero 5
there are three rejected, uncalibrated, very young 14C dates and three accepted ones: 10,190 +/- 120 ybp on megamammal, 10,440 +/- 100 ybp on megamammal, and 9560 +/- 50 ybp based on Megatherium americanum; the oldest is unambiguously Pleistocene and the youngest is unambiguously Holocene
Environment
Lithology: sandstone
Taphonomic context: fluvial deposit,human accumulation,paleosol
Archaeology: hearths,stone tools
Habitat comments: the member "is a sandy fluvial and lacustrine unit" and the material is from a paleosol that may have been developed in "alluvium" (Johnson et al. 2012)
there are lithics and burned bone and the "site is interpreted as a series of short-term occupations oriented toward secondary processing of megamammal remains and final stages of lithic reduction... bone was used as fuel" (Johnson et al. 2012)
there are lithics and burned bone and the "site is interpreted as a series of short-term occupations oriented toward secondary processing of megamammal remains and final stages of lithic reduction... bone was used as fuel" (Johnson et al. 2012)
Methods
Life forms: rodents,ungulates,other large mammals
Sampling methods: quarry
Sample size: 12 specimens
Sampling comments: quarried according to Johnson et al. (2012)
Metadata
Sample number: 3781
Contributor: John Alroy
Enterer: John Alroy
Created: 2021-06-09 13:28:42
Modified: 2023-04-29 03:47:50
Abundance distribution
9 species
6 singletons
total count 12
geometric series index: 54.0
Fisher's α: 16.358
geometric series k: 0.9170
Hurlbert's PIE: 0.8636
Shannon's H: 2.1383
Good's u: 0.5417
Each square represents a species. Square sizes are proportional to counts.
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Register
| Sclerocalyptus sp. | 1 | |
| †Eutatus seguini | 2 | |
| Vicugna sp. | 2 | |
| "Lama" compared to L. vicugna | ||
| Ctenomys sp. | 2 | |
| Reithrodon auritus | 1 | 81.3 g |
| Akodon cf. azarae | 1 | 24.4 g |
| Calomys sp. | 1 | |
| Galea musteloides | 1 | |
| Microcavia sp. | 1 | |