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 52432: authorized by Austin Hendy, entered by Austin Hendy on 05.08.2005, edited by Jonathan Marcot
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
"Phacoides gyrata" = Gibbolucina (Eomiltha) gyrata
"Phacoides gyrata" = Gibbolucina (Eomiltha) gyrata Gabb 1864 clam | |
? Sphenia meganosensis n. sp.
? Sphenia meganosensis n. sp. Clark and Woodford 1927 softshell clam | |
"Corbula dilatata" = Caryocorbula complicata
"Corbula dilatata" = Caryocorbula complicata Hanna 1924 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 | |
Gastropoda | |
Loxotrema turritum Gabb 1869 snail | |
"Polinices (Euspira) hornii" = Polinices hornii, "Neverita globosa" = Neverita (Neverita) globosa
"Polinices (Euspira) hornii" = Polinices hornii Gabb 1864 moon snail
"Neverita globosa" = Neverita (Neverita) globosa Gabb 1869 moon snail | |
Brachysphingus mammilatus Clark and Woodford 1927 true whelk | |
Bulbifusus californicus n. sp.
Bulbifusus californicus n. sp. Clark and Woodford 1927 snail |