Yale Point, AZ (A5-22) (Cretaceous of the United States)

Where: Navajo County, Arizona (36.3° N, 109.8° W)

• Paleocoordinates: 43.4° N, 68.3° W (Wright 2013)

• small collection-level geographic resolution

When: Neocardioceras Ammonite zone, Mancos Shale Formation, Cenomanian (100.5 - 93.9 Ma)

• Upper Cenomanian.

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

• Shale, moderately indurated, moderately to moderately well laminar.

Note: Section A5 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 3096: authorized by Charles Marshall, entered by Sofy Low on 23.07.1999

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Anthozoa
 Scleractinia - Caryophylliidae
"Platycyathus sp." = Trochocyathus (Platycyathus)
"Platycyathus sp." = Trochocyathus (Platycyathus) Fromentel 1863 stony coral
Polychaeta
 Serpulimorpha -
Hamulus sp.
Cephalopoda
 Ammonoida -
"Ammonoidea indet." = Ammonoida
"Ammonoidea indet." = Ammonoida Haeckel 1866 ammonite
originally entered as "Ammonite"; changed by JA 30.6.04
 Ammonitida - Acanthoceratidae
Neocardioceras sp.
Neocardioceras sp. Spath 1926 ammonite
 Ammonitida - Placenticeratidae
Placenticeras sp.
Placenticeras sp. Meek 1876 ammonite
 Ammonitida - Hamitidae
Stomohamites sp.
Gastropoda
 Neogastropoda - Fasciolariidae
? Bellifusus sp.
? Bellifusus sp. Stephenson 1941 snail
originally entered as "Bellifusus(?) sp."
 Sorbeoconcha - Aporrhaidae
Drepanocheilus ruidium
Drepanocheilus ruidium snail
originally entered as "Drepanochilus ruidium"
Bivalvia
 Ostreida - Gryphaeidae
Pycnodonte newberryi
 Ostreida - Pteriidae
Phelopteria sp.
Phelopteria sp. Stephenson 1953 pearl oyster
 Pectinida - Pectinoidae
Camptonectes sp.
Camptonectes sp. Meek 1864 scallop
 Pectinida - Anomiidae
Anomia sp.
Anomia sp. Linnaeus 1758 jingle
 Myalinida - Inoceramidae
Inoceramidae indet., Inoceramus ? tenuistriatus(), "Inoceramus pictus" = Inoceramus (Inoceramus) pictus, "Inoceramus pictus" = Inoceramus (Inoceramus) pictus
Inoceramidae indet. Giebel 1852 clam
originally entered as "informal Inoceramid indet."; changed by JA 21.2.07
Inoceramus ? tenuistriatus() Sowerby 1814 clam
originally entered as "Inoceramus tenuistriatus(?)"
"Inoceramus pictus" = Inoceramus (Inoceramus) pictus Sowerby 1829 clam
"pictus gracilestiatus" - originally entered as "Inoceramus pictus gracilestiatus"
"Inoceramus pictus" = Inoceramus (Inoceramus) pictus Sowerby 1829 clam
"pictus pictus" - originally entered as "Inoceramus pictus pictus"
 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
 Poromyida - Poromyidae
"Liopistha meeki" = Psilomya meeki
"Liopistha meeki" = Psilomya meeki White 1874 clam