Tecopa Lake Beds ( of the United States)

Also known as LACM 1209; LACM 7111; Standing Camel Basin; Tecopa Basin; Tecopa Lake Basin
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Where: Inyo County, California (36.0° N, 116.3° W: paleocoordinates 36.1° N, 115.7° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Tecopa Lake Beds Formation, Blancan (4.9 - 1.8 Ma)

• "from several stratigraphic levels... a few meters below the Huckleberry Ridge Tuff (2.1 Ma)" and therefore late Blancan instead of Illinoian, as thought by Jefferson 1991; the date is 2.103 +/- 0.019 Ma (laser fusion Ar/Ar) and derives from Honey et al. 1998 (Whistler and Webb 2005)

• member-level stratigraphic resolution

Environment/lithology: lacustrine; gypsiferous mudstone

• "Deposits comprise a series of lacustrine and marginal fluviatile deposits" (Whistler and Webb 2005)
• "a variety of gypsiferous mudstones, siltstones, and tufa (subaerial and freshwater limestone), with basin marginal deposits of sandstone and conglomerate"; fossils are from a "lake mud" also called an "unctuous... deep clay mire" (Whistler and Webb 2005)

Reposited in the LACM

Primary reference: G. T. Jefferson. 1991. A catalogue of late Quaternary Vertebrates from California: Part Two, Mammals. Natural History Museum of Los Angeles County Technical Reports 7:1-129 [J. Alroy/J. Alroy/P. Holroyd]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 20540: authorized by John Alroy, entered by John Alroy on 07.06.1994

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Aves
 Phoenicopteriformes - Phoenicopteridae
cf. Phoenicopterus sp.
cf. Phoenicopterus sp. Linnaeus 1758 flamingo
Mammalia
 Proboscidea - Elephantidae
Mammuthus sp.
Mammuthus sp. Brookes 1828 mammoth
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 Proboscidea - Mammutidae
Mammutidae indet.
Mammutidae indet. Hay 1922 mastodon
"mastodon"
 Rodentia - Sciuridae
"Spermophilus cf. bensoni" = Citellus (Otospermophilus) bensoni
"Spermophilus cf. bensoni" = Citellus (Otospermophilus) bensoni Gidley 1922 squirrel
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 Rodentia - Cricetidae
Sigmodon sp., Neotoma sp., Peromyscus sp.
Sigmodon sp. Say and Ord 1825 cotton rat
Neotoma sp. Say and Ord 1825 pack rat
Peromyscus sp. Gloger 1841 deer mouse
 Rodentia - Heteromyidae
Dipodomys sp.
Dipodomys sp. Gray 1841 kangaroo rat
two species
 Lagomorpha - Leporidae
"Hypolagus cf. limnetus" = Hypolagus edensis
"Hypolagus cf. limnetus" = Hypolagus edensis Frick 1921 rabbit
 Theriamorpha - Soricidae
Sorex sp., Notiosorex sp.
Sorex sp. Linnaeus 1758 long-tailed shrew
Notiosorex sp. Baird 1877 gray shrew
 Carnivora - Canidae
Canidae indet.
Canidae indet. Fischer de Waldheim 1817 canid
"moderate-sized fox"
 Artiodactyla - Cervidae
Cervidae indet.
Cervidae indet. Gray 1821 deer
DUPLICATE REF 2018 or 2019: omitted by Whistler and Webb 2005
 Artiodactyla - Antilocapridae
Antilocapridae indet.
Antilocapridae indet. Gray 1866 pronghorn
 Artiodactyla - Camelidae
Camelops sp., cf. Hemiauchenia sp., Capricamelus gettyi n. gen. n. sp.
Camelops sp. Leidy 1854 camel
cf. Hemiauchenia sp. Gervais and Ameghino 1880 camel
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Capricamelus gettyi n. gen. n. sp. Whistler and Webb 2005 camel
type is from LACM 7111
 Perissodactyla - Equidae
Equus sp.
Equus sp. Linnaeus 1758 horse
large and small DUPLICATE REF 2018 or 2019