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
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 52421: authorized by Austin Hendy, entered by Austin Hendy on 05.08.2005, edited by Mark Uhen
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Turritella meganosensis n. sp. Clark and Woodford 1927 turret shell
Turritella merriami Dickerson 1913 turret shell | |
Ficopsis meganosensis n. sp.
Ficopsis meganosensis n. sp. Clark and Woodford 1927 fig shell | |
Polinices (Euspira) nuciformis Gabb 1864 moon snail | |
"Scaphander cf. costatus" = Scaphander (Mirascapha) costatus
"Scaphander cf. costatus" = Scaphander (Mirascapha) costatus Gabb 1864 snail | |
Bivalvia | |
"Glycymeris major" = Glycymerita major
| |
"Modiolus (Brachydontes) ornatus" = Brachidontes (Brachidontes) cowlitzensis
"Modiolus (Brachydontes) ornatus" = Brachidontes (Brachidontes) cowlitzensis Weaver and Palmer 1922 mussel | |
"Phacoides meganosensis n. sp." = Miltha (Miltha) meganosensis
"Phacoides meganosensis n. sp." = Miltha (Miltha) meganosensis Clark and Woodford 1927 clam | |
"Macrocallista meganosensis n. sp." = Microcallista (Costacallista) conradiana meganosensis, Pitar uvasana
"Macrocallista meganosensis n. sp." = Microcallista (Costacallista) conradiana meganosensis Clark and Woodford 1927 venus clam | |
"Spisula tejonensis" = Mactromeris tejonensis, "Spisula meganosensis n. sp." = Pseudocardium meganosensis
"Spisula tejonensis" = Mactromeris tejonensis Packard 1916 clam
"Spisula meganosensis n. sp." = Pseudocardium meganosensis Clark and Woodford 1927 clam | |
| |
Echinoidea | |
"Hesperocidaris merriami" = Cidaris merriami1
| |
|