"Sandstone Reef" locality, CAS 31318a, Fresno County (Paleocene of the United States)

Where: Fresno County, California (36.6° N, 120.7° W: paleocoordinates 41.2° N, 99.7° W)

• coordinate based on political unit

When: Lodo Formation, Paleocene (66.0 - 56.0 Ma)

• Locality is Lodo Fm., adjacent to mudstone of Moreno Member.

•Beds 200ft. stratigraphically lower than locality CAS 31318.

•Lowermost sand above the K-T boundary.

Environment/lithology: marine; lithified sandstone

• Lithology described as """"""""""""""""sandstone reef"""""""""""""""", which could infer a number of things including off-shore bar, part of a delta complex or simply a """"""""""""""""reef rock"""""""""""""""" with some quartz grains in the rock itself. Not enough information is given in the source however to interpret the author's observations, therefore it is given the designation of """"""""""""""""sandstone"""""""""""""""".

Primary reference: J. T. Smith. 1975. Age, Correlation and Possible Tethyan Affinities of Mollusks from the Lodo Formation of Fresno County, California. Paleogene Symposium & Selected Technical Papers: Conference on Future Energy Horizons of the Pacific Coast 464-483 [A. Miller/C. Ferguson]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 11121: authorized by Arnold Miller, entered by Chad Ferguson on 19.07.2001

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Terebratulida -
? Eogryphus sp.
? Eogryphus sp. Hertlein and Grant IV 1944
 Rhynchonellida - Rhynchonellidae
? Rhynchonella sp.
? Rhynchonella sp. Fischer 1809
spelled as "Rhynconella (?) sp."
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium sp.
Dentalium sp. Linnaeus 1758 tusk shell
Bivalvia
 Carditida - Astartidae
"Opisoma cf. pacifica" = Opis (Hesperopis) triangulata
"Opisoma cf. pacifica" = Opis (Hesperopis) triangulata Cooper 1894 clam
misspelled as "Opisima ? cf. pacifica"
 Cardiida - Tellinidae
"? Semele packardi" = Tellina (Angulus) packardi
"? Semele packardi" = Tellina (Angulus) packardi Dickerson 1914 tellin clam
 Nuculida - Nuculidae
Acila (Truncacila) sp.
Acila (Truncacila) sp. Grant and Gale 1931 divaricate nutclam
Gastropoda
 Heterostropha - Ringiculidae
"Tornatellaea cf. pinguis" = Ringicula (Ringicula) pinguis
"Tornatellaea cf. pinguis" = Ringicula (Ringicula) pinguis Gabb 1864 snail
 Neogastropoda - Buccinidae
Brachysphingus sp.
Brachysphingus sp. Gabb 1869 true whelk
 Neogastropoda - Melongenidae
"? Neptunea aff. mucronata" = Sycum mucronatum
"? Neptunea aff. mucronata" = Sycum mucronatum Gabb 1869 snail