Where: Sandoval County, New Mexico (35.7° N, 106.9° W: paleocoordinates 38.2° N, 73.0° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Prionocyclus hyatti ammonoid zone, Semilla Sandstone Member (Mancos Shale Formation), Middle Turonian (93.5 - 89.3 Ma)
• STRATIGRAPHIC RELATIONS: From the Semilla Sandstone Mbr of the Mancos Shale, which overlies Blue Shale (early Carlile Shale equivalent), and is overlain by another shale (late Carlile Shale equivalent). AGE: Middle Turonian, on the basis of ammonoid biostratigraphy; Prionocyclus hyatti zone. STRATIGRAPHIC POSITION: From unit 2, in lower part of the Semilla Sandstone, 6 ft above base of member.
• bed-level stratigraphic resolution
Environment/lithology: marine; lithified, concretionary, calcareous sandstone
Size class: macrofossils
Reposited in the USNM
Collection methods: surface (in situ),
• COLLECTOR: Multiple collectors (1962-1964). REPOSITORY: USNM.
Primary reference: C. H. Dane, E. G. Kauffman, and W. A. Cobban. 1968. Semilla Sandstone, a new member of the Mancos Shale in the southeastern part of the San Juan Basin, New Mexico. United States Geological Survey Professional Paper 1254(F):1-21 [A. Hendy/A. Hendy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 88641: authorized by Austin Hendy, entered by Austin Hendy on 16.04.2009, edited by Matthew Clapham
Creative Commons license: CC BY (attribution)
Taxonomic list
Malacostraca | |
Seorsus kauffmani n. sp.
| |
Cephalopoda | |
Prionocyclus hyatti Stanton 1894 ammonite | |
Coilopoceras springeri Hyatt 1903 ammonite | |
Bivalvia | |
Ostrea malachitensis, ""Ostrea" sannionis" = Cameleolopha sannionis
Ostrea malachitensis oyster
""Ostrea" sannionis" = Cameleolopha sannionis White 1876 oyster | |
? Syncyclonema sp. Meek 1864 scallop | |
Inoceramus howelli White 1876 clam
Inoceramus aff. dimidius White 1874 clam | |
"Cardium aff. pauperculum" = Pleuriocardia (Dochmocardia) pauperculum
"Cardium aff. pauperculum" = Pleuriocardia (Dochmocardia) pauperculum Meek 1871 cockle | |
Tellina sp. Linnaeus 1758 tellin clam | |
? Cymbophora emmonsi clam | |
Anatina aff. lineata clam | |
"Cyrena" securis clam
"Cyrena" sp. Lamarck clam | |
Sinonia aff. levis venus clam | |
Gastropoda | |
? Pyropsis sp. Conrad 1860 snail | |
Xenophora simpsoni carrier shell | |
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