UCMP loc. 2988, Kreyenhagen Hills (Pliocene of the United States)

Where: Fresno County, California (36.0° N, 120.3° W: paleocoordinates 35.8° N, 119.0° W)

• coordinate stated in text

When: Etchegoin Formation, Early/Lower Pliocene (5.3 - 3.6 Ma)

• "Middle Etchegoin"

Environment/lithology: marginal marine; lithified, coarse-grained sandstone and conglomerate

• The beds of coal, the coarseness of the sandstones and conglomerates, the variation of the lithology within short distances, and the character of the molluscan fauna may be taken as indicative of deposition under shallow water conditions. The occurrence of quantities of gypsum at some localities, if it can be proved to be interstratified with the clastic rocks, may indicate that in part the beds are terrestrial or that the basin of deposition was nearly isolated from the sea.
• On Jacalitos Creek the Pliocene strata comprise essentially an alternation of soft coarse sandstone and conglomerate. In many of the fossiliferous horizons the beds have been much indurated, causing these strata to outcrop prominently. Of minor importance are shale, rhyolitie tuff, and thin layers of coal. A bed of silicious limestone having a thickness of about ten feet was traced more than one-half mile until cut off by faulting. A short distance above and below the limestone marine fossils were found.

Size class: macrofossils

Collected by Nomland; reposited in the UCMP

Primary reference: J. O. Nomland. 1917. The Etchegoin Pliocene of middle California. University of California Publications, Bulletin of the Department of Geology 10(14):191-254 [J. Alroy/J. Alroy/J. Marcot]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 220190: authorized by Jonathan Marcot, entered by Jonathan Marcot on 11.05.2021

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Bivalvia
 Arcida - Arcidae
"Arca trilineata" = Anadara trilineata
"Arca trilineata" = Anadara trilineata Conrad 1856 ark
 Cardiida - Veneridae
"Paphia staminea" = Leukoma staminea
"Paphia staminea" = Leukoma staminea Conrad 1837 venus clam
 Cardiida - Tellinidae
"Macoma inquinata" = Macoma (Macoma) inquinata
"Macoma inquinata" = Macoma (Macoma) inquinata Deshayes 1855 tellin clam
as ssp. Macoma inquinata affinis
Gastropoda
 Cerithioidea - Turritellidae
"Turritella nova" = Turritella cooperi nova
"Turritella nova" = Turritella cooperi nova Nomland 1916 turret shell
 Neogastropoda - Muricidae
Thais lamellosa, Murex (Ocinebra) tethys, Trophon belcheri, Trophon magister
Thais lamellosa Gmelin 1791 murex snail
Murex (Ocinebra) tethys Nomland 1917 murex snail
Trophon belcheri murex snail
as ssp. Trophon belcheri avitum
Trophon magister Nomland 1916 murex snail
 Trochoidea - Trochidae
Calliostoma coalingensis
Calliostoma coalingensis Arnold 1909 top snail