Wahweap Wash, UT (U1-23) (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: basinal (); lithified, gray, calcareous lime mudstone

• Marlstone, well indurated, poorly 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 3692: authorized by Charles Marshall, entered by Sofy Low on 06.08.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

 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 flavus clam
"flavus pictoides" - originally entered as "Inoceramus flavus pictoides"
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"
 Ostreida - Pteriidae
Phelopteria sp. Stephenson 1953 pearl oyster
 Carditida - Astartidae
? Astarte sp. Sowerby 1816 clam
originally entered as "Astarte (?) sp."
 Pholadida - Corbulidae
Corbula sp. Bruguière 1789 clam
 Cardiida - Mactridae
Cymbophora sp. Gabb 1869 clam
 Lucinida - Lucinidae
Lucina sp. Bruguière 1797 clam
 Stromboidea - Aporrhaidae
Drepanocheilus ruidium snail
originally entered as "Drepanochilus ruidium"
 Naticoidea - Naticidae
Euspira concinna moon snail
 Basommatophora - Siphonariidae
Anisomyon sp. Meek and Hayden 1860 pulmonate
 Ammonitida - Placenticeratidae
Placenticeras sp. Meek 1876 ammonite
 Ammonitida - Acanthoceratidae
Pseudaspidoceras sp. Hyatt 1903 ammonite
 Ammonitida - Baculitidae
Sciponoceras sp. Hyatt 1894 ammonite