UCMP 3152, Deer Valley (Eocene of the United States)

Where: Contra Costa County, California (37.9° N, 121.8° W: paleocoordinates 40.6° N, 104.6° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Meganos Formation, Ypresian (56.0 - 47.8 Ma)

• "Meganos" faunas represent upper Bulitian and lower Penutian local ages=Ypresian

• bed-level stratigraphic resolution

Environment/lithology: coastal; lithified, fine-grained, pebbly, calcareous sandstone

• Shallow marine coastal siliciclastic environment
• Fine, micaceous sandstone, commonly with small pebbles, thinly beeded near bottom, more massive at top, yellow-brown to gray in color. The massive sandstones near top contain lenses of harded calcareous and fossiliferous sandstones.

Size class: macrofossils

Reposited in the UCMP

Collection methods: quarrying,

• Collected by Clark and Woodford. Collections reposited at UCMP.

Primary reference: B. L. Clark and A. O. Woodford. 1927. The geology and paleontology of the type section of the Meganos Formation (lower Middle Eocene) of California. University of California Publications in Geological Sciences 17(2):63-142 [A. Miller/A. Hendy/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 52422: authorized by Austin Hendy, entered by Austin Hendy on 05.08.2005, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• Identified by Clark and Stewart.
Show authors, comments, and common names
Gastropoda
 Cerithioidea - Turritellidae
Turritella meganosensis n. sp., Turritella merriami
Turritella meganosensis n. sp. Clark and Woodford 1927 turret shell
Turritella merriami Dickerson 1913 turret shell
 Sorbeoconcha - Naticidae
Polinices (Euspira) nuciformis, "Polinices (Euspira) hornii" = Polinices hornii
Polinices (Euspira) nuciformis Gabb 1864 moon snail
"Polinices (Euspira) hornii" = Polinices hornii Gabb 1864 moon snail
 Sorbeoconcha - Cassidae
Galeodea meganosensis n. sp.2
Galeodea meganosensis n. sp.2 Vokes 1939 snail
 Neogastropoda - Olividae
Oliva meganosensis n. sp.
Oliva meganosensis n. sp. Clark and Woodford 1927 olive snail
 Neogastropoda - Pseudolividae
"Pseudoliva cf. dilleri" = Calorebama dilleri
"Pseudoliva cf. dilleri" = Calorebama dilleri Dickerson 1914 snail
 Neogastropoda - Clavatulidae
? Turricula cooperi
? Turricula cooperi Dickerson 1916 snail
 Neogastropoda - Turridae
Gemmula diabloensis
Gemmula diabloensis Clark and Woodford 1927 turrid
 Neogastropoda - Drilliidae
Drillia hartleyensis
Drillia hartleyensis Clark and Woodford 1927 snail
 Trochoidea - Solariellidae
Solariella hartleyensis
Solariella hartleyensis Clark and Woodford 1927 snail
 Opisthobranchia - Cylichnidae
"Scaphander cf. costatus" = Scaphander (Mirascapha) costatus
"Scaphander cf. costatus" = Scaphander (Mirascapha) costatus Gabb 1864 snail
Bivalvia
 Nuculanida - Nuculanidae
"Leda gabbi" = Nuculana (Saccella) gabbii
"Leda gabbi" = Nuculana (Saccella) gabbii Conrad 1866 pointed nut clam
 Pandorida - Lyonsiidae
Lyonsia venturaensis n. sp.
Lyonsia venturaensis n. sp. Clark and Woodford 1927 clam
 Pholadida - Corbulidae
Corbula diaboli n. sp.
Corbula diaboli n. sp. Clark and Woodford 1927 clam
 Cardiida - Ungulinidae
"Diplodonta cretacea" = Diplodonta (Diplodonta) cretacea
"Diplodonta cretacea" = Diplodonta (Diplodonta) cretacea Gabb 1864 clam
 Cardiida - Veneridae
Pitar uvasana, "Macrocallista meganosensis n. sp." = Microcallista (Costacallista) conradiana meganosensis, Pitaria californica
Pitar uvasana Conrad 1855 venus clam
Subspecies: Pitaria uvasana marhsallensis
"Macrocallista meganosensis n. sp." = Microcallista (Costacallista) conradiana meganosensis Clark and Woodford 1927 venus clam
Pitaria californica Clark 1918 venus clam
Subspecies: Pitaria californica stewartensis
 Cardiida - Mactridae
"Spisula tejonensis" = Mactromeris tejonensis, "Spisula meganosensis" = Pseudocardium meganosensis
"Spisula tejonensis" = Mactromeris tejonensis Packard 1916 clam
"Spisula meganosensis" = Pseudocardium meganosensis Clark and Woodford 1927 clam
 Cardiida - Psammobiidae
Gari (Gobraeus) sp.1
Gari (Gobraeus) sp.1 Brown 1844 clam
 Cardiida - Cardiidae
"Cardium (Protocardium) marysvillensis" = Nemocardium (Nemocardium) linteum, "Cardium hartleyensis n. sp." = Acanthocardia (Schedocardia) brewerii hartleyensis
"Cardium (Protocardium) marysvillensis" = Nemocardium (Nemocardium) linteum Conrad 1855 cockle
"Cardium hartleyensis n. sp." = Acanthocardia (Schedocardia) brewerii hartleyensis Clark and Woodford 1927 cockle
 Lucinida - Lucinidae
"Phacoides meganosensis n. sp." = Miltha (Miltha) meganosensis
"Phacoides meganosensis n. sp." = Miltha (Miltha) meganosensis Clark and Woodford 1927 clam
 Carditida - Crassatellidae
"Crassatellites meganosensis n. sp." = Crassatella meganosensis
"Crassatellites meganosensis n. sp." = Crassatella meganosensis Clark and Woodford 1927 clam
 Mytilida - Mytilidae
"Modiolus (Brachydontes) ornatus" = Brachidontes (Brachidontes) cowlitzensis
"Modiolus (Brachydontes) ornatus" = Brachidontes (Brachidontes) cowlitzensis Weaver and Palmer 1922 mussel
 Ostreida - Malleidae
Pedalion sp.
Pedalion sp. Huddesford 1770 oyster
 Ostreida - Pteriidae
Pteria sp.
Pteria sp. Scopoli 1777 pearl oyster
 Arcida - Glycymerididae
"Glycymeris major" = Glycymerita major
"Glycymeris major" = Glycymerita major Stanton 1896 clam
Subspecies: Glycymeris major meganosensis
1Moore 2003; 2Squires 2019