Wahweap Wash, UT (U1-20) (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, black, green, calcareous shale

• Claystone, slightly silty, mod. 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 3689: authorized by Charles Marshall, entered by Sofy Low on 06.08.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Bivalvia
 Carditida - Astartidae
? Astarte sp.
? Astarte sp. Sowerby 1816 clam
originally entered as "Astarte (?) sp."
 Lucinida - Lucinidae
Lucina sp.
Lucina sp. Bruguière 1797 clam
 Pholadida - Corbulidae
Corbula sp.
Corbula sp. Bruguière 1789 clam
 Myalinida - Inoceramidae
Inoceramidae indet., Mytiloides aff. submytiloides, Inoceramus ? tenuistriatus, "Inoceramus pictus" = Inoceramus (Inoceramus) pictus
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 ? tenuistriatus clam
"tenuistriatus (?)" - originally entered as "Inoceramus tenuistriatus (?)"
"Inoceramus pictus" = Inoceramus (Inoceramus) pictus Sowerby 1829 clam
"pictus pictus" - originally entered as "Inoceramus pictus pictus"
 Ostreida - Pteriidae
Phelopteria sp.
Phelopteria sp. Stephenson 1953 pearl oyster
 Ostreida - Ostreidae
Ostreidae indet.
Ostreidae indet. Rafinesque 1815 oyster
originally entered as "Oyster spat "
 Ostreida - Gryphaeidae
Pycnodonte newberryi
Gastropoda
 Sorbeoconcha - Aporrhaidae
Drepanocheilus ruidium
Drepanocheilus ruidium snail
originally entered as "Drepanochilus ruidium"
 Cerithioidea - Turritellidae
Turritella sp.
Turritella sp. Lamarck 1799 turret shell
Cephalopoda
 Ammonitida - Acanthoceratidae
Neocardioceras sp.
Neocardioceras sp. Spath 1926 ammonite
 Ammonitida - Baculitidae
Sciponoceras sp.
Sciponoceras sp. Hyatt 1894 ammonite