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Exogyra cancellata Stephenson, 1914
Remarks
- Collector: Ralph Johnson (M.A.P.S. Collection)
- Formation: Monmouth Group, Mount Laurel Formation
- Location: Monmouth County, NJ
General Info
Synonyms (older names and misidentifications in the literature)
- 1834 Ostrea tortosa Morton
- 1861 Exogyra costata Say; Gabb
- 1914 Exogyra costata var. cancellata Stephenson
- 1982 Exogyra cancellata Stephenson; Offeman et al.
Stratigraphic Occurrence
- Ripley Formation of Mississippi, Alabama, and Georgia
- Selma Group, Demopolis Formation of Alabama, Tennessee, Illinois, and Mississippi
- Peedee Formation of North Carolina
- Monmouth Group, Mount Laurel Formation of New Jersey and Delaware
- Monmouth Group, Severn Formation of Maryland
- Navarro Group, Saratoga Formation of Arkansas
- Navarro Group, Marlbrook Formation of Texas and Arkansas
- Navarro Group, Neylandville Formation of Texas
- Mendez Formation of Mexico
- Cardenas Formation of Mexico
Age
- Exogyra cancellata Stephenson is a great marker for the late Campanian Stage of the Gulf and Atlantic Coastal deposits (~76 mya).
Geographic Occurrence (not an all-inclusive list)
- Alcorn County, MS
- Alexander County, IL
- Bladen County, NC
- Cecil County, MD
- Chester County, TN
- Chickasaw County, MS
- Clark County, AR
- Clay County, MS
- Collin County, TX
- Columbus County, NC
- Dallas County, AL
- Delta County, TX
- Duplin County, NC
- Gloucester County, NJ
- Hempstead County, AR
- Henderson County, TN
- Hunt County, TX
- Kaufman County, TX
- Lee County, MS
- Marengo County, AL
- Marion County, GA
- McNairy County, TN
- Milam County, TX
- Monmouth County, NJ
- Navarro County, TX
- New Castle County, DE
- Noxubee County, MS
- Ocean County, NJ
- Pitt County, NC
- Prentiss County, MS
- State of San Luis Potosi, Mexico
- Stewart County, GA
- Sumter County, AL
- Wilcox County, AL
Remarks
For identification and descriptions, see:
- Richards, H. G. 1958. The Cretaceous Fossils of New Jersey. New Jersey Geological Survey Bulletin 61 (2), 117–118.
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Stephenson, L. W. 1914. Cretaceous Deposits of the Eastern Gulf Region and Species of Exogyra from the Eastern Gulf Region and the Carolinas. United States Geological Survey Professional Paper 81.
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Stephenson, L. W. 1933. The Zone of Exogyra cancellata Traced Twenty-Five Hundred Miles. American Association of Petroleum Geologists Bulletin 17 (11), 1351–1361.
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