Where: Kern County, California (34.9° N, 118.8° W: paleocoordinates 34.5° N, 106.9° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Tejon Formation, Bartonian (41.3 - 38.0 Ma)
• From upper Tejon Formation, and most likely from "Tejon" stage, or possibly the "Transition" stage. Therefore a upper Middle Eocene=Narizian=Bartonian age is assigned to the collection, although it is possibly as old as Lutetian. The Tejon Formation unconformably overlies basement, and is unconformably overlain by the Tecuya Formation (Oligocene) in this section. About 13 m stratigraphically below top of undivided Tejon Formation. It is not specified which member of the Tejon Formation the collection is derrived.
• bed-level stratigraphic resolution
Environment/lithology: coastal; lithified, shelly/skeletal sandstone
Size class: macrofossils
Reposited in the USGS
Collection methods: quarrying,
• Collected by T.H. Nilson and W.O. Addicott. Collections likely to be reposited at USGS Menlo Park or USNM (not specified).
Primary reference: T. H. Nilsen. 1987. Stratigraphy and sedimentology of the Eocene Tejon Formation, western Tehachapi and San Emigdio mountains, California. United States Geological Survey Professional Paper 1268:1-110 [A. Miller/A. Hendy/R. McClees-Funinan]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 52828: authorized by Austin Hendy, entered by Austin Hendy on 22.08.2005, edited by Susan Tremblay
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Nuculana sp. Link 1807 pointed nut clam | |
Glycymeris sp. Da Costa 1778 clam | |
| |
"Pitar cf. tejonensis" = Pitar uvasana
"Pitar cf. tejonensis" = Pitar uvasana Conrad 1855 venus clam | |
Cardiidae indet., "Schedocardia breweri" = Schedocardia brewerii
Cardiidae indet. Lamarck 1809 cockle
"Schedocardia breweri" = Schedocardia brewerii Gabb 1864 cockle | |
"Tellina castacana" = Tellina (Angulus) castacana
"Tellina castacana" = Tellina (Angulus) castacana Anderson and Hanna 1925 tellin clam | |
"Gari hornii" = Gari (Gobraeus) hornii
"Gari hornii" = Gari (Gobraeus) hornii Gabb 1864 clam | |
"Corbula cf. hornii" = Caryocorbula hornii
"Corbula cf. hornii" = Caryocorbula hornii Gabb 1864 clam | |
Venericardia sp. Lamarck 1801 clam | |
Scaphopoda | |
Dentalium sp. Linnaeus 1758 tusk shell | |
Gastropoda | |
Acmaeidae indet. Forbes 1850 limpet | |
"Acmaea cf. tejonensis" = Patelloida tejonensis Gabb 1869 limpet | |
Naticidae indet., "Amauropsis alveata" = Amaurellina moragai
Naticidae indet. Guilding 1834 moon snail
"Amauropsis alveata" = Amaurellina moragai Stewart 1927 moon snail | |
"Molopophorus tejonensis" = Molopophorus cretaceus
"Molopophorus tejonensis" = Molopophorus cretaceus Gabb 1864 snail | |
Surculites ioformis turrid | |
Olivella sp. Swainson 1831 olive snail | |
"? Ectinochilus sp." = Rimella
"? Ectinochilus sp." = Rimella Agassiz 1840 true conch | |
"? Mayena cf. kewi" = Ameranella kewi
"? Mayena cf. kewi" = Ameranella kewi Dickerson 1915 triton shell | |
"Ficopsis horni" = Priscoficus hornii, "Ficopsis remondi" = Ficus remondii
"Ficopsis horni" = Priscoficus hornii Gabb 1864 fig shell
"Ficopsis remondi" = Ficus remondii Gabb 1864 fig shell | |
Turritella cf. buwaldana Dickerson 1916 turret shell | |
Calyptraea cf. diegoana Conrad 1855 slipper shell | |
? Pyramidella sp. Lamarck 1799 snail |