Where: Contra Costa County, California (37.9° N, 121.8° W)
• Paleocoordinates: 45.6° N, 94.3° W (Wright 2013)
• 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 52423: authorized by Austin Hendy, entered by Austin Hendy on 05.08.2005, edited by Jonathan Marcot
Creative Commons license: CC0 (CC0)
Taxonomic list
Gastropoda | |
Ficopsis meganosensis n. sp.
Ficopsis meganosensis n. sp. Clark and Woodford 1927 fig shell | |
Brachysphingus mammilatus Clark and Woodford 1927 true whelk | |
Bulbifusus californicus n. sp.
Bulbifusus californicus n. sp. Clark and Woodford 1927 snail | |
Polinices (Euspira) nuciformis Gabb 1864 moon snail | |
Turritella meganosensis n. sp. Clark and Woodford 1927 turret shell | |
"Scaphander cf. costatus" = Scaphander (Mirascapha) costatus
"Scaphander cf. costatus" = Scaphander (Mirascapha) costatus Gabb 1864 snail | |
Bivalvia | |
"Crassatellites meganosensis n. sp." = Crassatella meganosensis
"Crassatellites meganosensis n. sp." = Crassatella meganosensis Clark and Woodford 1927 clam | |
"Macrocallista meganosensis n. sp." = Microcallista (Costacallista) conradiana meganosensis
"Macrocallista meganosensis n. sp." = Microcallista (Costacallista) conradiana meganosensis Clark and Woodford 1927 venus clam | |
"Spisula meganosensis n. sp." = Pseudocardium meganosensis
"Spisula meganosensis n. sp." = Pseudocardium meganosensis Clark and Woodford 1927 clam | |
| |
"Cardium (Protocardium) marysvillensis" = Nemocardium (Nemocardium) linteum
"Cardium (Protocardium) marysvillensis" = Nemocardium (Nemocardium) linteum Conrad 1855 cockle | |
"Modiolus (Brachydontes) ornatus" = Brachidontes (Brachidontes) cowlitzensis
"Modiolus (Brachydontes) ornatus" = Brachidontes (Brachidontes) cowlitzensis Weaver and Van Winkle Palmer 1922 mussel | |
"Glycymeris major" = Glycymerita major
| |
Scaphopoda | |
Dentalium cooperi Gabb 1864 tusk shell |