Pacific City
Basic information
Sample name: Pacific City
Sample aka: LACM 7679
Reference: T. A. Wake and M. A. Roeder. 2009. A diverse Rancholabrean vertebrate microfauna from southern California includes the first fossil record of ensatina (Ensatina eschscholtzii: Plethodontidae). Quaternary Research 72:364-370 [ER 3200]
Geography
Country: United States
State: California
Coordinate: 33° 41' N, 118° 0' W
Coordinate basis: based on nearby landmark
Time interval: Late Pleistocene
Ma: 0.04098
Age basis: radiocarbon (uncalibrated)
Geography comments: "approximately 1 km south of the Huntington Beach Pier and1 km inland from the current shoreline" (coordinate based on Huntington Beach)
"A single freshwater mollusk shell recovered fromthe dark organic layer that produced the microfaunal remains discussed here (LACM 7679) has been AMS radiocarbon dated to 40,980±800 14C yr BP"
"A single freshwater mollusk shell recovered fromthe dark organic layer that produced the microfaunal remains discussed here (LACM 7679) has been AMS radiocarbon dated to 40,980±800 14C yr BP"
Environment
Lithology: claystone
Taphonomic context: fluvial deposit
Habitat comments: "These sediments are most likely associated with late Pleistocene channels of the Santa Ana River system... a thin, dark organic layer of fine-grained silts and clays within the broader light tan interbedded fluvial sand deposits"
Methods
Life forms: rodents,other small mammals,birds,lizards,snakes,turtles,frogs,salamanders,fishes
Sampling methods: quarry,screenwash
Sample size: 695 specimens
Sampling comments: "A bulk sample of 1000 kg of fine-grained fossil-bearing sediments was collected in the field. These sediments were treated with a variety of defloculants and washed through 0.5-mm mesh"
Metadata
Sample number: 3510
Contributor: John Alroy
Enterer: John Alroy
Created: 2019-09-10 14:55:55
Modified: 2023-09-11 10:41:08
Abundance distribution
33 species
6 singletons
total count 695
extrapolated richness: 48.6
Fisher's α: 7.206
geometric series k: 0.8506
Hurlbert's PIE: 0.8592
Shannon's H: 2.4630
Good's u: 0.9914
Each square represents a species. Square sizes are proportional to counts.
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