Where: San Juan County, New Mexico (36.8° N, 108.9° W: paleocoordinates 37.7° N, 71.9° W)
• coordinate stated in text
When: Mancos Formation, Late/Upper Cenomanian (99.6 - 93.5 Ma)
• time equivilant [to the Upper Cenomanian Hartland Shale Member, Greenhorn Formation] proximal offshore deposits (prodelta and equivalents; Danke et al., 1993) of the Tropic and Mancos Shales
• bed-level stratigraphic resolution
Environment/lithology: prodelta; lithified, bioturbated shale
Size classes: macrofossils, mesofossils, microfossils
Preservation: mold/impression, original aragonite, original calcite
Collection methods: bulk,
Primary reference: B. S. Sageman and C. R. Bina. 1997. Diversity and Species Abundance Patterns in Late Cenomanian Black Shale Biofacies, Western Interior, U.S. Palaios 12:449-466 [L. Ivany/P. Wall/P. Wall]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 44284: authorized by Linda Ivany, entered by Patrick Wall on 08.09.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Metoicoceras cf. mosbyense, "Calycoceras cf. naviculare" = Calycoceras (Calycoceras) naviculare
Metoicoceras cf. mosbyense Cobban 1953 ammonite
"Calycoceras cf. naviculare" = Calycoceras (Calycoceras) naviculare Mantell 1822 ammonite | |
Scaphopoda | |
Cadulus praetenuis tusk shell | |
Bivalvia | |
Plicatula cf. hydrotheca, "Plicatula cf. ferryi" = Plicatula (Plicatula) ferryi
Plicatula cf. hydrotheca scallop
"Plicatula cf. ferryi" = Plicatula (Plicatula) ferryi Coquand 1862 scallop | |
"Psilomya cf. concentrica" = Liopistha (Psilomya)
"Psilomya cf. concentrica" = Liopistha (Psilomya) clam | |
? Geltena sp. Stephenson 1946 clam | |
Astarte sp. n. sp.
Astarte sp. n. sp. Sowerby 1816 clam | |
Gastropoda | |
Cerithiopsis sp. Hanley 1849 snail | |
Gyrodes cf. tramitensis moon snail | |
Turritella sp. Lamarck 1799 turret shell |