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 58 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 52827: authorized by Austin Hendy, entered by Austin Hendy on 22.08.2005, edited by Susan Tremblay
Creative Commons license: CC BY (attribution)
Taxonomic list
Scaphopoda | |
? Dentalium sp. Linnaeus 1758 tusk shell | |
Gastropoda | |
? Turbonilla sp. Risso 1826 snail
Pyramidella mucronis Anderson and Hanna 1925 snail | |
Patelloida tejonensis Gabb 1869 limpet
Acmaea cf. ruckmani Dickerson 1916 limpet | |
Acmaeidae indet. Forbes 1850 limpet | |
Turritella buwaldana Dickerson 1916 turret shell
Turritella uvasana Conrad 1855 turret shell | |
Calyptraea sp. Lamarck 1799 slipper shell | |
Naticidae indet. Guilding 1834 moon snail
Neverita sp. Risso 1826 moon snail
"Amauropsis alveata" = Amaurellina moragai Stewart 1927 moon snail | |
Whitneyella sinuata Gabb 1864 snail | |
Bonellitia paucivaricata Gabb 1864 snail | |
Turridae indet. Swainson 1840 turrid | |
"Olivella mathewsoni" = Olivella mathewsonii
"Olivella mathewsoni" = Olivella mathewsonii Gabb 1864 olive snail | |
Exilia "sp. A" Conrad 1860 snail
Exilia "sp. B" Conrad 1860 snail
Exilia fausta Anderson and Hanna 1925 snail | |
Bivalvia | |
"Nuculana cf. gabbi" = Nuculana gabbii
"Nuculana cf. gabbi" = Nuculana gabbii Conrad 1866 pointed nut clam | |
| |
"Halonanus horni" = Pachecoa hornii, Barbatia cf. suzzalloi
"Halonanus horni" = Pachecoa hornii Gabb 1864 clam
Barbatia cf. suzzalloi Weaver and Palmer 1922 clam | |
"Schedocardia breweri" = Schedocardia brewerii, "Nemocardium linteum" = Nemocardium (Nemocardium) linteum
"Schedocardia breweri" = Schedocardia brewerii Gabb 1864 cockle
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum Conrad 1855 cockle | |
Tellinidae indet. Blainville 1814 tellin clam
Macoma viticola Anderson and Hanna 1925 tellin clam | |
Pitar uvasana Conrad 1855 venus clam
? Macrocallista sp. Meek 1876 venus clam | |
"Spisula cf. bisculpturata" = Mactromeris bisculpturata, "Spisula merriami" = Mactromeris merriami
"Spisula cf. bisculpturata" = Mactromeris bisculpturata Anderson and Hanna 1925 clam
"Spisula merriami" = Mactromeris merriami Packard 1916 clam |