USGS Mesozoic M8576, Williams Reservoir (Cretaceous of the United States)

Also known as 89-E-29

Where: Santa Clara County, California (37.1° N, 121.9° W: paleocoordinates 43.4° N, 91.6° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Late/Upper Campanian (83.5 - 70.6 Ma)

• Age is poorly constrained but indicative of Late Campanian. Taxa have type locality near at Texas Flat, near Folsom, which belongs to Upper Campanian based on Baculites inornatus and B. occidentalis. Spondylus subnodosus has its type locality in the Santa Ana Mountains in Upper Campanian Metaplacenticeras pacificum zone. Baculitids found are only known from Late Campanian.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified siliciclastic sediments

Size class: macrofossils

Collected by W.P. Elder in 1989; reposited in the USNM

Primary reference: W. P. Elder. 1991. An unusual Late Cretaceous fauna from an oyster-rich interval in the Santa Cruz Mountains of California. United States Geological Survey Bulletin 1934:E1-E18 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 167697: authorized by Matthew Clapham, entered by Matthew Clapham on 29.03.2015, edited by Susan Tremblay

Creative Commons license: CC BY (attribution)

Taxonomic list

Echinoidea
  -
Echinoidea indet. Leske 1778 sea urchin
Scaphopoda
 Dentaliida - Dentaliidae
? Dentalium cooperi Gabb 1864 tusk shell
Gastropoda
  -
Gastropoda indet. Cuvier 1795 snail
 Sorbeoconcha - Naticidae
Gyrodes sp. Conrad 1860 moon snail
 Sorbeoconcha - Hipponicidae
Hipponix dichotomus Gabb 1864 hoof shell
 Patellogastropoda -
"Patellacea indet." = Patelloidea
"Patellacea indet." = Patelloidea Rafinesque 1815 limpet
Bivalvia
 Heteroconchia -
Heteroconchia indet. Gray 1854 clam
 Mytilida - Mytilidae
Mytilus cf. quadratus Gabb 1869 mussel
 Myalinida - Inoceramidae
Inoceramidae indet. Giebel 1852 clam
 Ostreiformii -
Pectinida indet. Gray 1854 scallop
 Pectinida - Pectinoidae
Lyriochlamys traskii Gabb 1864 scallop
Spondylus subnodosus Packard 1922 scallop
 Pectinida - Limidae
Acesta "sp. A" Adams and Adams 1858 file clam
Lima "sp. A" Bruguière 1797 file clam
 Pectinida - Plicatulidae
? Plicatula sp. Lamarck 1801 scallop
? Plicatula "sp. a" Lamarck 1801 scallop
 Ostreida - Gryphaeidae
Anthozoa
 Scleractinia - Rhizangiidae
"? Astrangiidae indet." = Rhizangiidae
"? Astrangiidae indet." = Rhizangiidae d'Orbigny 1851 stony coral
Demospongiae
 Clavulina - Clionaidae
Entobia sp. Bronn 1838 demosponge
 Ichnofossils -
Rogerella sp. Saint-Seine 1951