CAS Loc. 2361 - Joaquin Ridge [Ragged Valley Shale] (Cretaceous of the United States)

Also known as CAS Loc. 31593

Where: Fresno County, California (36.3° N, 120.6° W: paleocoordinates 42.2° N, 96.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Neodesmoceras catarinae ammonoid zone, Ragged Valley Shale Formation (Asuncion Group), Early/Lower Maastrichtian (70.6 - 66.0 Ma)

• LITHOSTRATIGRAPHY: From the Ragged Valley Shale, Asuncion Gp, for which lithostratigraphic relations are unknown. AGE: Early Maastrichtian, on the basis of ammonoid biostratigraphy. STRATIGRAPHIC POSITION: From higher beds within the group.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified shale

• ENVIRONMENT: Siliciclastic marine setting.
• LITHOLOGY: Shale. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Preservation: cast, mold/impression

Collected by Church in 1931; reposited in the CAS

Collection methods: surface (in situ),

• COLLECTOR: Church, Hanna, and Huett, 1931. REPOSITORY: California Academy of Sciences.

Primary reference: F. M. Anderson. 1958. Upper Cretaceous of the Pacific Coast. Geological Society of America Memoir 71:1-378 [A. Miller/A. Hendy/M. Clapham]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 83776: authorized by Austin Hendy, entered by Austin Hendy on 31.08.2008, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for macrofossils. NOMENCLATURE: Authoritative publication, but with somewhat antiquated nomenclature.
Show authors, comments, and common names
Cephalopoda
 Ammonitida - Diplomoceratidae
Solenoceras sp.1
Solenoceras sp.1 Conrad 1860 ammonite
from CAS loc. 31593
 Ammonitida - Baculitidae
Baculites lomaensis n. sp., Baculites rex1
Baculites lomaensis n. sp. Anderson 1958 ammonite
Baculites rex1 Anderson 1958 ammonite
from CAS loc. 31593
 Ammonitida - Nostoceratidae
Nostoceras sp., Exiteloceras desertense, "Exiteloceras aff. vancouverense" = Didymoceras vancouverensis, "Didymoceras fresnoense" = Didymoceras vancouverensis, Bostrychoceras sp.
Nostoceras sp. Hyatt 1894 ammonite
Exiteloceras desertense Anderson 1958 ammonite
"Exiteloceras aff. vancouverense" = Didymoceras vancouverensis Gabb 1864 ammonite
"Didymoceras fresnoense" = Didymoceras vancouverensis Gabb 1864 ammonite
Bostrychoceras sp. Hyatt 1900 ammonite
 Ammonitida - Tetragonitidae
"Lytoceras (Tetragonites) epigonum" = Epigoniceras epigonum, Tetragonites popetensis1, "Gaudryoceras (Vertebrites) cf. kayei" = Gaudryceras kayei1, Anagaudryceras sp.1
"Lytoceras (Tetragonites) epigonum" = Epigoniceras epigonum Kossmat 1895 ammonite
Tetragonites popetensis1 Yabe 1903 ammonite
"Gaudryoceras (Vertebrites) cf. kayei" = Gaudryceras kayei1 Forbes 1846 ammonite
Anagaudryceras sp.1 Shimizu 1934 ammonite
 Ammonitida - Desmoceratidae
"Damesites hetonaiensis" = Damesites hetonaiensis1, "Neokotoceras fresnoense" = Damesites hetonaiensis, "Hauericeras churchi n. sp." = Hauericeras rembda
"Damesites hetonaiensis" = Damesites hetonaiensis1 Matsumoto 1942 ammonite
SUBSPECIES: Damesites hetonaiensis fresnoensis
"Neokotoceras fresnoense" = Damesites hetonaiensis Matsumoto 1942 ammonite
"Hauericeras churchi n. sp." = Hauericeras rembda Forbes 1846 ammonite
 Ammonitida - Pachydiscidae
"Joaquinites fascicostatum n. gen. n. sp." = Pachydiscus subcompressus, "Parapachydiscus catarinae" = Neodesmoceras catarinae
"Joaquinites fascicostatum n. gen. n. sp." = Pachydiscus subcompressus Matsumoto 1954 ammonite
from CAS loc. 31593
"Parapachydiscus catarinae" = Neodesmoceras catarinae Anderson and Hanna 1935 ammonite
 Nautilida - Nautilidae
Nautilus (Cymatoceras) hermosus
Gastropoda
 Neogastropoda - Volutidae
Volutoderma perissa2
Volutoderma perissa2 Saul and Squires 2008 volute
Bivalvia
 Myalinida - Inoceramidae
Inoceramus sp.
Inoceramus sp. Sowerby 1814 clam
1Matsumoto 1960; 2Saul and Squires 2008