Wahweap Wash, UT (U1-21) (Cretaceous of the United States)

Where: Kane County, Utah (37.1° N, 111.6° W: paleocoordinates 38.5° N, 74.4° W)

• small collection-level geographic resolution

When: Neocardioceras Ammonite zone, Tropic Shale Formation, Late/Upper Cenomanian (99.6 - 93.5 Ma)

• Bed horizon is the sample number not the lithologic unit number. The lithologic unit numbers that correspond to the sample numbers given can be found in reference for collection (Elder, 87).

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, gray, green, calcareous shale

• Shale, mod. indurated, mod. laminar.

Note: Section U1 constitutes interbedded limestones and shales, but this sedimentary structure is not reflected in the descriptions of each collection, as each is often a single bed, or a portion thereof.

Size class: macrofossils

Collection methods: bulk, mechanical,

• Bulk sample disaggregated in lab.

Primary reference: W. P. Elder. 1987. The paleoecology of the Cenomanian-Turonian (Cretaceous) stage boundary extinctions at Black Mesa, Arizona. Palaios 2(1):24-40 [C. Marshall/S. Low/A. Clement]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 3690: authorized by Charles Marshall, entered by Sofy Low on 06.08.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Myalinida - Inoceramidae
Inoceramidae indet. Giebel 1852 clam
originally entered as "informal Inoceramid indet."; changed by JA 21.2.07
Mytiloides aff. submytiloides clam
"aff. M. submytiloides" - originally entered as "Mytiloides aff. M. submytiloides"
Inoceramus pictus Sowerby 1829 clam
"pictus pictus" - originally entered as "Inoceramus pictus pictus"
Inoceramus pictus Sowerby 1829 clam
"pictus gracilestiatus" - originally entered as "Inoceramus pictus gracilestiatus"
 Pectinida - Anomiidae
Anomia sp. Linnaeus 1758 jingle
 Ostreida - Ostreidae
Ostreidae indet. Rafinesque 1815 oyster
originally entered as "Oyster spat "
Ostreidae indet. Rafinesque 1815 oyster
originally entered as "Oyster indet."
 Ostreida - Pteriidae
Phelopteria sp. Stephenson 1953 pearl oyster
originally entered as "Phelopteria sp."
 Carditida - Astartidae
? Astarte sp. Sowerby 1816 clam
originally entered as "Astarte (?) sp."
 Pholadida - Corbulidae
Corbula sp. Bruguière 1789 clam
 Lucinida - Lucinidae
Lucina sp. Bruguière 1797 clam
Gastropoda
 Stromboidea - Aporrhaidae
Drepanocheilus ruidium snail
originally entered as "Drepanochilus ruidium"
Cephalopoda
 Ammonoidea -
Ammonoidea indet. ammonite
originally entered as "Ammonite"; changed by JA 30.6.04
 Ammonitida - Acanthoceratidae
 Ammonitida - Scaphitidae
Worthoceras sp. Adkins 1928 ammonite
 Ammonitida - Baculitidae
Sciponoceras sp. Hyatt 1894 ammonite
 Ammonitida - Hamitidae
 Ammonitida - Diplomoceratidae