Volcanic Arenite, Vaqueros Fm - Near Point, Santa Cruz Island (Oligocene of the United States)

Where: Santa Barbara County, California (34.0° N, 120.0° W: paleocoordinates 32.6° N, 111.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Volcanic Arenite Member (Vaqueros Formation), Chattian (28.1 - 23.0 Ma)

• The Vaqueros Formation is subdivided into two units on Santa Cruz Island, a lower conglomerate unit and an upper volcanic arenite. The collection is from the volcanic arenite, which overlies the conglomerate.

• member-level stratigraphic resolution

Environment/lithology: coastal; lithified, medium-grained, volcaniclastic, brown sandstone

• High energy, shallow-water siliciclastic environment.
• Medium borwn volcanic arenite.

Size class: macrofossils

Collection methods: quarrying,

• Reported by Bereskin and Edward. Not sure of any repositories.

Primary reference: D. E. Weaver. 1969. Geology of the Northern Channel Islands. American Association of Petroleum Geologists - Pacific Section [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 52418: authorized by Austin Hendy, entered by Austin Hendy on 04.08.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

• Nomenclature appears reasonable. Unsure of identifier.
Maxillopoda
 Sessilia - Balanidae
Balanus sp. Da Costa 1778 barnacle
 Sessilia - Tetraclitidae
Tetraclita sp. Schumacher 1817 barnacle
Lingulata
 Lingulida - Disciniidae
Discinisca sp. Gray 1840
Bivalvia
 Arcida - Arcidae
Anadara sp. Gray 1847 ark
 Pectinida - Pectinoidae
Lyropecten miguelensis Arnold 1906 scallop
 Ostreida - Gryphaeidae
"Ostrea eldridgei" = Pycnodonte (Crenostrea) eldridgei
"Ostrea eldridgei" = Pycnodonte (Crenostrea) eldridgei Arnold 1907 oyster
Subspecies: Ostrea eldrigei ynezana
 Mytilida - Mytilidae
"Mytilus expansus" = Crenomytilus expansus
"Mytilus expansus" = Crenomytilus expansus Arnold 1907 mussel
 Cardiida - Veneridae
Chione schencki venus clam
Dosinia merriami Clark 1915 venus clam
Dosinia margaritana Wiedey 1928 venus clam
"Clementia pertenuis" = Clementia (Egesta) pertenuis Gabb 1864 venus clam
Subspecies: Clementia pertenuis conradiana
 Cardiida - Tellinidae
Macoma nasuta Conrad 1837 tellin clam
 Cardiida - Cardiidae
Cardium sp. Linnaeus 1758 cockle
 Hiatellida - Hiatellidae
"Panope cf. generosa" = Panopea abrupta
"Panope cf. generosa" = Panopea abrupta Conrad 1849 clam
 Lucinida - Lucinidae
"Phacoides acutilineatus" = Lucinoma acutilineata
"Phacoides acutilineatus" = Lucinoma acutilineata Conrad 1849 clam
Gastropoda
 Cephalaspidea - Cylichnidae
Scaphander jugularis Conrad 1855 snail
 Neogastropoda - Muricidae
Trophon sp., "Thais carrizoensis" = Thais packi, "Purpura milicentana" = Ocenebra milicentana
Trophon sp. Montfort 1810 murex snail
"Thais carrizoensis" = Thais packi Clark 1918 murex snail
"Purpura milicentana" = Ocenebra milicentana Loel and Corey 1932 murex snail
Misspelled: Purpra
 Naticoidea - Naticidae
"Polinices recluzianus" = Glossaulax reclusiana
"Polinices recluzianus" = Glossaulax reclusiana Deshayes 1839 moon snail
Subspecies: Polinices recluzianus andersoni
 Calyptraeoidea - Calyptraeidae
Calyptraea ? filosa Gabb 1866 slipper shell
 Tonnoidea - Personidae
Distorsio sp. Röding 1798 snail
 Sorbeoconcha - Turritellidae
Turritella ocoyana Conrad 1855 turret shell
Turritella temblorensis Wiedey 1928 turret shell
 Trochoidea - Trochidae
Mammalia
 Cetacea -
Cetacea indet. Brisson 1762 whale