Caņada Chiquita
Basic information
Sample name: Caņada Chiquita
Sample aka: SDSNH locality 6408
Reference: T. S. Kelly. 2011. Small mammals from the Sespe Formation (Arikareean) of Caņada Chiquita, Orange County, California. Paludicola 8(3):128-141 [ER 4167]
Geography
Country: United States
State: California
County: Orange
Coordinate: 33.53° N, -117.61° W
Coordinate basis: estimated from map
Scale: quarry
Formation: Sespe
Time interval: Late Oligocene
Geography comments: at "the Santa Margarita Water District's Upper Chiquita Reservoir at Caņada Chiquita in Rancho Santa Margarita" (coordinate estimated using Google Maps)
"Arikareean in age, possibly early to early late Arikareean" based on biochronology, and therefore bracketed by 30.0 to 22.8 Ma based on the time scale of Albright et al. (2008)
this interval is essentially Late Oligocene and not Early Miocene, contra Fig. 7
"Arikareean in age, possibly early to early late Arikareean" based on biochronology, and therefore bracketed by 30.0 to 22.8 Ma based on the time scale of Albright et al. (2008)
this interval is essentially Late Oligocene and not Early Miocene, contra Fig. 7
Environment
Lithology: claystone
Habitat comments: "from a silty claystone bed near the base of the exposed section"
Methods
Life forms: rodents,ungulates,other small mammals
Sampling methods: screenwash
Sample size: 61 specimens
Museum: San Diego Museum of Natural History
Sampling comments: recovered "by wet screen sieving of over 2,722 kg (6000-pounds) of bulk matrix, followed by heavy liquid separation of the fossils from the resulting concentrate... Due to subsequent construction, the locality has been graded away"
Metadata
Sample number: 4627
Contributor: John Alroy
Enterer: John Alroy
Created: 2025-01-02 03:31:20
Modified: 2025-01-02 03:31:20
Abundance distribution
10 species
4 singletons
total count 61
geometric series index: 21.2
Fisher's α: 3.400
geometric series k: 0.6737
Hurlbert's PIE: 0.6347
Shannon's H: 1.5167
Good's u: 0.9344
Each square represents a species. Square sizes are proportional to counts.
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