Grant Hall Square G7 (Unit E)
Basic information
Sample name: Grant Hall Square G7 (Unit E)
Reference: A. C. Macken, G. J. Prideaux, and E. H. Reed. 2012. Variation and pattern in the responses of mammal faunas to Late Pleistocene climatic change in southeastern South Australia. Journal of Quaternary Science 27(4):415-424 [ER 3686]
Geography
Country: Australia
State: South Australia
Coordinate: 37° 2' S, 140° 48' E
Coordinate basis: based on nearby landmark
Time interval: Late Pleistocene
Section: 3686
Unit number: 4
Unit order: above to below
Max Ma: 0.093
Min Ma: 0.076
Age basis: OSL
Geography comments: "Grant Hall is a phreatic chamber of Victoria Fossil Cave, located within Naracoorte Caves National Park (basis of coordinate), 12 km southeast of Naracoorte in southeastern South Australia".
The age of the Grant Hall deposit had been constrained between 206 ka and 76 ka by uranium-series dating of associated speleothems.
Further analyses have shown the deposit is characterized by five depositional units deposited from 93 ± 8 ka to 76 ± 6 ka (Macken et al. 2011).
The age of the Grant Hall deposit had been constrained between 206 ka and 76 ka by uranium-series dating of associated speleothems.
Further analyses have shown the deposit is characterized by five depositional units deposited from 93 ± 8 ka to 76 ± 6 ka (Macken et al. 2011).
Environment
Lithology: sandstone
Taphonomic context: cave,pitfall trap
Habitat comments: "The fossil-bearing sediments are sandwiched between separate flowstones that covered the limestone base of the cave and overlaid the sediment's surface".
"The sediments are largely homogeneous, consisting of a mixture of red/brown and pale yellow medium to fine sub-rounded quartz grains, mixed with darker red-brown clay particles".
The grid square 7 sedimentary layers are coloured dark brown to dark yellow brown throughout.
"The primary mode of faunal accumulation into Grant Hall has been identified as pitfall entrapment through a now blocked solution pipe in the chamber roof (Fraser and Wells 2006)".
"The sediments are largely homogeneous, consisting of a mixture of red/brown and pale yellow medium to fine sub-rounded quartz grains, mixed with darker red-brown clay particles".
The grid square 7 sedimentary layers are coloured dark brown to dark yellow brown throughout.
"The primary mode of faunal accumulation into Grant Hall has been identified as pitfall entrapment through a now blocked solution pipe in the chamber roof (Fraser and Wells 2006)".
Methods
Life forms: rodents,other large mammals,other small mammals
Sampling methods: quarry,screenwash
Sample size: 1084 specimens
Sampling comments: "Bone and sediment were excavated from 21 layers from grid square 7, each of approximately 5 cm depth, to a total depth of 98 cm".
"Fossil data from these excavation layers were aggregated into five discrete depositional units (A–E)".
"Large bone material was relieved from the surrounding sediment using dental probes and brushes".
"Bulk sediment from each excavation layer was wet screened in sieves with 2 mm diameter mesh and dried in trays. All sieved material was sorted for diagnostic elements".
The material from Unit A was excluded from all analyses (and thus, not reported) "due to very low specimen numbers".
"Fossil data from these excavation layers were aggregated into five discrete depositional units (A–E)".
"Large bone material was relieved from the surrounding sediment using dental probes and brushes".
"Bulk sediment from each excavation layer was wet screened in sieves with 2 mm diameter mesh and dried in trays. All sieved material was sorted for diagnostic elements".
The material from Unit A was excluded from all analyses (and thus, not reported) "due to very low specimen numbers".
Metadata
Sample number: 3857
Contributor: Benjamin Carter
Enterer: Benjamin Carter
Created: 2022-01-21 14:06:20
Modified: 2023-04-29 00:42:58
Abundance distribution
35 species
4 singletons
total count 1084
geometric series index: 48.6
Fisher's α: 6.916
geometric series k: 0.8391
Hurlbert's PIE: 0.8160
Shannon's H: 2.2666
Good's u: 0.9963
Each square represents a species. Square sizes are proportional to counts.
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