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A USGS Zonal Table for the Upper Cretaceous Middle Cenomanian--Maastrichtian of the Western Interior of the United States Based on Ammonites, Inoceramids, and Radiometric Ages
- W. A. Cobban, I. Walaszczyk, J. Obradovich, K. C. McKinney
- Environmental Science
- 2006
The Global Boundary Stratotype Section and Point for the base of the Turonian Stage of the Cretaceous： Pueblo, Colorado, U.S.A.
- W. Kennedy, I. Walaszczyk, W. A. Cobban
- Geology, Environmental Science
- 1 June 2005
Following the recommendation of the International Commission on Stratigraphy (16 votes Yes [94%], 1 abstention, 2 votes not received), the Global boundary Stratotype Section and Point (GSSP) for the…
Stratigraphy and geologic history of the Montana group and equivalent rocks, Montana, Wyoming, and North and South Dakota
- J. R. Gill, W. A. Cobban
- Geology
- 1973
During Late Cretaceous time a broad north-trending epicon tinental sea covered much of the western interior of North America and extended from the Gulf of Mexico to the Arctic Ocean. The sea was…
Patterns and Timing of Synorogenic Sedimentation in Upper Cretaceous Rocks of Central and Northeast Utah
- T. Fouch, T. Lawton, D. Nichols, W. B. Cashion, W. A. Cobban
- Geology
- 1983
Abstract Patterns of sedimentation in central and northeast Utah along the western margin of the Late Cretaceous seaway were controlled by thrust-fold tectonic events in eastern and southern Nevada,…
Pueblo, Colorado, USA, candidate Global Boundary Stratotype Section and Point for the base of the Turonian Stage of the Cretaceous, and for the base of the Middle Turonian Substage, with a revision…
- W. Kennedy, I. Walaszczyk, W. A. Cobban
- Geology, Environmental Science
- 2000
An updated account of the candidate Global Boundary Stratotype Section and Point for the base of the Turonian Stage and the base of the Middle Turonian Substage in the Bridge Creek Member of the…
Stratigraphy and ammonite fauna of the Graneros Shale and Greenhorn Limestone near Pueblo, Colorado
- W. A. Cobban, G. R. Scott
- Geology
- 1972
__________________________.. Introduction ______________________________________ Acknowledgments _________________._____ Previous work _______________________________ Stratigraphy…
Ammonites from the Navesink Formation at Atlantic Highlands, New Jersey
- W. A. Cobban
- Geology
- 1974
Only a few species of ammonites have been recorded from the Upper Cretaceous Navesink .Formation. An active group of amateur collectors has recently obtained many ammonite specimens from the basal…
Diversity and distribution of Late Cretaceous ammonites, Western Interior, United States
- W. A. Cobban
- Geology
- 28 January 1993
The Late Cretaceous ammonites Scaphites leei Reeside and Scaphites hippocrepis (DeKay) in the western interior of the United States
- W. A. Cobban
- Geology, Geography
- 1969
_________________________ Introduction_____________________ Geographic distribution.-_.________ Sequence of fossils_________________ Dimorphism in ammonites._________ Ammonites other than scaphites_…
Stratigraphy of the Niobrara Formation at Pueblo, Colorado
- G. R. Scott, W. A. Cobban
- Geology
- 1964
Eight lithologlc units were mapped in the Niobrara Formation of Late Cretaceous age during a study of the engineering geology of the Northwest Pueblo quadrangle. The thin Fort Hays Limestone Member…
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