Zallah 7 Incision
Basic information
Sample name: Zallah 7 Incision
Sample aka: Z7I
Reference: P. M. C. Coster, K. C. Beard, M. J. Salem, Y. Chaimanee, M. Brunet, and J. J. Jaeger. 2015. A new early Oligocene mammal fauna from the Sirt Basin, central Libya: Biostratigraphic and paleobiogeographic implications. Journal of African Earth Sciences 104:43-55 [ER 3923]
Geography
Country: Libya
State: Jufra
Coordinate: 28.666489° N, 17.541222° E
Coordinate basis: estimated from map
Formation: Sirt Basin
Time interval: Early Oligocene
Max Ma: 31
Min Ma: 30
Age basis: paleomag
Geography comments: The Z7I locality is situated in the "Continental and Transitional Marine Deposits" (CTMD) within the Sirt Basin ~10 km north of Zallah Oasis, Libya
The Zallah Incision local fauna has been correlated with Fayum quarries V and G, combined with two separate GPTS (paleomag) proposals the site has been dated to ~31 Ma - ~30 Ma (upper Chron C12r - upper Chron C11r)
The Zallah Incision local fauna has been correlated with Fayum quarries V and G, combined with two separate GPTS (paleomag) proposals the site has been dated to ~31 Ma - ~30 Ma (upper Chron C12r - upper Chron C11r)
Environment
Lithology: sandstone
Taphonomic context: fluvial deposit
Habitat comments: "A level of light greenish to reddish gypsiferous fine to coarse-grained sandstones"
The Zallah Incision local fauna were recovered from the base of a fluvial channel
The Zallah Incision local fauna were recovered from the base of a fluvial channel
Methods
Life forms: rodents,ungulates,marine mammals,other small mammals
Sampling methods: screenwash
Sample size: 158 specimens
Sampling comments: ~1 ton of sediment was screenwashed
Metadata
Sample number: 4324
Contributor: Jack Nesbitt
Enterer: Jack Nesbitt
Created: 2023-07-05 11:16:46
Modified: 2023-09-11 10:56:49
Abundance distribution
6 species
1 singleton
total count 158
geometric series index: 8.1
Fisher's α: 1.235
geometric series k: 0.4263
Hurlbert's PIE: 0.6396
Shannon's H: 1.2090
Good's u: 0.9937
Each square represents a species. Square sizes are proportional to counts.
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