Where: Contra Costa County, California (37.9° N, 121.7° W: paleocoordinates 40.5° N, 104.5° 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
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 52429: authorized by Austin Hendy, entered by Austin Hendy on 05.08.2005
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
"Scaphander cf. costatus" = Scaphander (Mirascapha) costatus
"Scaphander cf. costatus" = Scaphander (Mirascapha) costatus Gabb 1864 snail | |
Turritella meganosensis n. sp.
Turritella meganosensis n. sp. Clark and Woodford 1927 turret shell | |
"Polinices (Euspira) hornii" = Polinices hornii, Polinices (Euspira) gesteri, Polinices (Euspira) nuciformis
"Polinices (Euspira) hornii" = Polinices hornii Gabb 1864 moon snail
Polinices (Euspira) gesteri Dickerson 1916 moon snail
Polinices (Euspira) nuciformis Gabb 1864 moon snail | |
Cypraea sp. Linnaeus 1758 cowry | |
Bivalvia | |
"Leda gabbi" = Nuculana (Saccella) gabbii
"Leda gabbi" = Nuculana (Saccella) gabbii Conrad 1866 pointed nut clam | |
"Modiolus (Brachydontes) ornatus" = Brachidontes (Brachidontes) cowlitzensis
"Modiolus (Brachydontes) ornatus" = Brachidontes (Brachidontes) cowlitzensis Weaver and Palmer 1922 mussel | |
"Arca hornii n. sp." = Pachecoa hornii
| |
"Glycymeris major" = Glycymerita major
| |
"Diplodonta cretacea" = Diplodonta (Diplodonta) cretacea
"Diplodonta cretacea" = Diplodonta (Diplodonta) cretacea Gabb 1864 clam | |
Tivela kelloggensis Clark and Woodford 1927 venus clam | |
"Spisula meganosensis n. sp." = Pseudocardium meganosensis
"Spisula meganosensis n. sp." = Pseudocardium meganosensis Clark and Woodford 1927 clam | |
"Corbula dilatata" = Caryocorbula complicata
"Corbula dilatata" = Caryocorbula complicata Hanna 1924 clam | |
"Solen cf. parallelus" = Solena (Plectosolen) parallelus, Solena (Eosolen) subverticala
"Solen cf. parallelus" = Solena (Plectosolen) parallelus Gabb 1864 clam
Solena (Eosolen) subverticala Vokes 1939 clam | |
"Phacoides gyrata" = Gibbolucina (Eomiltha) gyrata, "Phacoides meganosensis n. sp." = Miltha (Miltha) meganosensis
"Phacoides gyrata" = Gibbolucina (Eomiltha) gyrata Gabb 1864 clam
"Phacoides meganosensis n. sp." = Miltha (Miltha) meganosensis Clark and Woodford 1927 clam | |
"Crassatellites meganosensis" = Crassatella meganosensis
"Crassatellites meganosensis" = Crassatella meganosensis Clark and Woodford 1927 clam |