PBDB Collection

Calvert Canyon (Cretaceous of the United States)

Where: Hudspeth County, Texas (30.8° N, 105.3° W: paleocoordinates 33.1° N, 73.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Pseudaspidoceras flexuosum ammonoid zone, Ojinaga Formation, Early/Lower Turonian (93.5 - 89.3 Ma)

• COMMENTS: a bed of "less than 50 cm of section" in the "basal Turonian Pseudaspidoceras flexuosum Zone". AGE: Early Turonian, on the basis of ammonoid biostratigraphy; Pseudaspidoceras flexuosum zone.

• bed-level stratigraphic resolution

Environment/lithology: offshore; concretionary, black shale

• "brown-weathering black concretions in brown-white weathering black shales"

Size class: macrofossils

Reposited in the OUM

• specimens are in the University Museum, Oxford

Primary reference: W. J. Kennedy, C. W. Wright, and J. M. Hancock. 1987. Basal Turonian ammonites from west Texas. Palaeontology 30(1):27-74 [J. Alroy/J. Alroy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 80991: authorized by John Alroy, entered by John Alroy on 25.05.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Bivalvia
Myalinida - Inoceramidae	Mytiloides columbianus Mytiloides columbianus clam
Cephalopoda
Ammonitida - Acanthoceratidae	Mammitinae indet., Mammites powelli n. sp., Quitmaniceras reaseri, Pseudaspidoceras flexuosum, Kamerunoceras calvertense Mammitinae indet. Hyatt 1900 ammonite Mammites powelli n. sp. Kennedy et al. 1987 ammonite Quitmaniceras reaseri Powell 1963 ammonite "more than 150" specimens Pseudaspidoceras flexuosum Powell 1963 ammonite Kamerunoceras calvertense Powell 1963 ammonite
Ammonitida - Pseudotissotidae	Wrightoceras munieri Wrightoceras munieri Pervinquiére 1907 ammonite
Ammonitida - Pseudotissotiidae	Thomasites adkinsi Thomasites adkinsi Kummel and Decker 1954 ammonite
Ammonitida - Vascoceratidae	Fagesia catinus, Neoptychites sp., Vascoceras proprium Fagesia catinus Mantell 1822 ammonite Neoptychites sp. Kossmat 1895 ammonite Vascoceras proprium Reyment 1954 ammonite "more than sixty specimens"
Ammonitida - Scaphitidae	"Worthoceras cf. vermiculus" = Worthoceras vermiculum "Worthoceras cf. vermiculus" = Worthoceras vermiculum Shumard 1860 ammonite 1
Ammonitida - Baculitidae	Sciponoceras sp. Sciponoceras sp. Hyatt 1894 ammonite
Ammonitida - Anisoceratidae	Allocrioceras dentonense, Allocrioceras larvatum Allocrioceras dentonense Moreman 1942 ammonite Allocrioceras larvatum Conrad 1855 ammonite "more than 150 specimens"