UCMP loc. 3159, Deer Valley: Ypresian, California

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda - Solariellidae
Solariella hartleyensis n. sp. Clark and Woodford 1927
U category
Gastropoda - Opisthobranchia - Cylichnidae
Scaphander cf. costatus (Gabb 1864)
C category
recombined as Scaphander (Mirascapha) costatus
Gastropoda - Heterostropha - Acteonidae
Acteon sp. Montfort 1810
U category
Gastropoda - Naticidae
Polinices (Euspira) nuciformis (Gabb 1864)
U category
Polinices (Euspira) gesteri (Dickerson 1916)
U category
Polinices (Euspira) hornii (Gabb 1864)
C category
recombined as Polinices hornii
Gastropoda - Neogastropoda - Cancellariidae
Admete (Bonellitia) cf. stantoni (Dickerson 1913)
U category
synonym of Bonellitia (Admetula) paucivaricata
Gastropoda - Neogastropoda - Clavatulidae
? Turricula cooperi (Dickerson 1916)
U category
Gastropoda - Neogastropoda - Turridae
Gemmula wattsi Anderson and Hanna 1925
U category
Gastropoda - Neogastropoda - Drilliidae
Drillia hartleyensis n. sp. Clark and Woodford 1927
C category
Gastropoda - Neogastropoda - Nassariidae
Molopophorus californicus n. sp. Clark and Woodford 1927
U category
Gastropoda - Neogastropoda - Buccinidae
? Parvisipho meganosensis n. sp. Clark and Woodford 1927
U category
Siphonalia cf. sutterensis Dickerson 1913
U category
recombined as Siphonalia (Nassicola) sutterensis
Brachysphingus mammilatus Clark and Woodford 1927
A category
Gastropoda - Neogastropoda - Fasciolariidae
Bulbifusus californicus Clark and Woodford 1927
U category
Gastropoda - Turritellidae
Turritella merriami Dickerson 1913
U category
Turritella meganosensis n. sp. Clark and Woodford 1927
U category
Scaphopoda - Dentaliida - Dentaliidae
Dentalium cooperi (Gabb 1864)
U category
Bivalvia - Nuculida - Nuculidae
Nucula (Acila) gabbiana Dickerson 1916
U category
Bivalvia - Arcida - Glycymerididae
Glycymeris major (Stanton 1896)
C category
recombined as Glycymerita major
Subspecies: Glycymeris major meganosensis
Bivalvia - Arcida - Arcidae
Arca hornii Gabb 1864
U category
recombined as Pachecoa hornii
Subspecies: Arca horniii elusa
Bivalvia - Mytilida - Mytilidae
Modiolus (Brachydontes) ornatus (Gabb 1864)
U category
synonym of Brachidontes (Brachidontes) cowlitzensis
Bivalvia - Lucinida - Lucinidae
Phacoides meganosensis n. sp. Clark and Woodford 1927
C category
recombined as Miltha (Miltha) meganosensis
Bivalvia - Pholadida - Pholadidae
Martesia meganosensis n. sp. Clark and Woodford 1927
U category
Bivalvia - Cardiida - Mactridae
Spisula meganosensis n. sp. Clark and Woodford 1927
U category
recombined as Pseudocardium meganosensis
Bivalvia - Cardiida - Veneridae
Pitaria conradi Dickerson 1916
U category
Dosiniopsis stewartvillensis n. sp. Clark and Woodford 1927
U category
Macrocallista meganosensis n. sp. Clark and Woodford 1927
C category
recombined as Microcallista (Costacallista) conradiana meganosensis
Pitaria californica (Clark 1918)
A category
Subspecies: Pitaria californica stewartvillensis
Pitar uvasana (Conrad 1855)
U category
Subspecies: Pitaria uvasana marshallensis
Bivalvia - Cardiida - Ungulinidae
Diplodonta cretacea (Gabb 1864)
A category
original and current combination Lucina cretacea
Bivalvia - Cardiida - Cardiidae
Cardium (Protocardium) marysvillensis (Dickerson 1916)
U category
synonym of Nemocardium (Nemocardium) linteum
Bivalvia - Cardiida - Tellinidae
Tellina joaquinensis Arnold 1909
U category
recombined as Tellina (Angulus) joaquinensis
Tellina longa Gabb 1864
U category
recombined as Tellina (Angulus) longa
Bivalvia - Cardiida - Psammobiidae
Psammobia sp.
U category
    = Gari (Gobraeus) sp. Brown 1844
Moore 2003
Bivalvia - Solenida - Solenidae
Solen (Plectosolen) stantoni Weaver 1905
U category
    = Solena (Eosolen) subverticala Vokes 1939
Moore 2003
Solen cf. parallelus Gabb 1864
U category
recombined as Solena (Plectosolen) parallelus
Bivalvia - Carditida - Crassatellidae
Crassatellites meganosensis n. sp. Clark and Woodford 1927
C category
recombined as Crassatella meganosensis
Bivalvia - Carditida - Carditidae
Venericardia hornii (Gabb 1864)
U category
recombined as Venericardia (Pacificor) hornii
see common names

Geography
Country:United States State/province:California County:Contra Costa
Coordinates: 37.9° North, 121.8° West (view map)
Paleocoordinates:40.6° North, 104.6° West
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period:Paleogene Epoch:Eocene
Stage:Ypresian 10 m.y. bin:Cenozoic 2
Key time interval:Ypresian
Age range of interval:56.00000 - 47.80000 m.y. ago
Stratigraphy
Formation:Meganos Member:Margaret Hamilton Sand
Local section:Mount Diablo Local bed:D
Local order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: "Meganos" faunas represent upper Bulitian and lower Penutian local ages=Ypresian
said to be, "Margaret Hamilton Sand [=division D of Meganos Formation as used by Clark and Woodford (1927)]" by Squires 1997
Lithology and environment
Primary lithology:fine,pebbly lithified calcareous sandstone
Includes fossils?Y
Lithology description: 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.
Environment:coastal indet.
Geology comments: Shallow marine coastal siliciclastic environment
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:selective quarrying,field collection
Reason for describing collection:biostratigraphic analysis
Museum repositories:UCMP
Collection method comments: Collected by Clark and Woodford. Collections reposited at UCMP.
Taxonomic list comments:Identified by Clark and Stewart.
Metadata
Database number:52426
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:J. Marcot Research group:marine invertebrate
Created:2005-08-05 08:33:25 Last modified:2020-10-09 12:51:11
Access level:the public Released:2005-08-05 08:33:25
Creative Commons license:CC BY
Reference information

Primary reference:
14099. 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]

Secondary references:

24521 E. J. Moore. 2003. Tertiary marine pelecypods of California and Baja California, Chapter G: Tellinidae, Donacidae, Psammobiliidae, Semelidae:. 1-55 [A. Hendy/A. Hendy/J. Marcot]
32797 E. J. Moore. 2003. Tertiary marine pelecypods of California and Baja California: Crassatellidae through Pharidae. United States Geological Survey Professional Paper 1228(F):1-107 [A. Hendy/A. Hendy/J. Marcot]