UCMP loc. 2649: Early/Lower Pliocene, California

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Thecostraca - Balanomorpha - Balanidae
Balanus concavus Bronn 1831
Nomland 1917
recombined as Concavus concavus
Gastropoda - Neogastropoda - Muricidae
Murex perangulatus n. sp. Nomland 1916
Gastropoda - Neogastropoda - Siphonaliidae
Thais kettlemanensis Arnold 1909
Nomland 1917
recombined as Calicantharus kettlemanensis
Bivalvia - Arcida - Glycymerididae
Glycymeris septentrionalis (Middendorf 1849)
Nomland 1917
Bivalvia - Pectinida - Pectinidae
Pecten oweni (Arnold 1906)
Nomland 1917
replaced by Patinopecten lohri
Echinoidea - Clypeasteroida - Dendrasteridae
Dendraster gibbsii (Rémond 1863)
Nomland 1917
see common names

Geography
Country:United States State/province:California County:Fresno
Coordinates: 36.1° North, 120.5° West (view map)
Paleocoordinates:35.9° North, 119.2° West
Basis of coordinate:stated in text
Time
Period:Neogene Epoch:Pliocene
Stage:Zanclean 10 m.y. bin:Cenozoic 6
Key time interval:Early/Lower Pliocene
Age range of interval:5.33300 - 3.60000 m.y. ago
Stratigraphy
Formation:Jacalitos
Lithology and environment
Primary lithology:coarse lithified sandstone
Secondary lithology: conglomerate
Lithology description: 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.
Environment:marginal marine indet.
Geology comments: 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.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:general faunal/floral analysis
Museum repositories:UCMP
Metadata
Database number:206368
Authorizer:J. Marcot Enterer:J. Marcot
Modifier:J. Marcot Research group:marine invertebrate
Created:2019-11-13 17:24:01 Last modified:2020-12-21 15:38:30
Access level:the public Released:2019-11-13 17:24:01
Creative Commons license:CC BY
Reference information

Primary reference:
2656. J. O. Nomland. 1916. Fauna from the lower Pliocene at Jacalitos Creek and Waltham Canyon, Fresno County, California. University of California Publications, Bulletin of the Department of Geology 9(14):199-214 [J. Alroy/J. Alroy/P. Holroyd]

Secondary references:

2657 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]