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Greenhorn Cyclothem

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Series: GSA Field Guide
Published: 01 January 2013
DOI: 10.1130/2013.0033(10)
EISBN: 9780813756332
... of the cycle, and the limestones that formed during the maximum extent of the seaway in between. The Greenhorn Cyclothem Stop 1. Dakota Sandstone Figure 5. Segment of Comanche National Grassland stratigraphic section showing Greenhorn Cyclothem deposits from the Dakota Sandstone through...
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Journal Article
Published: 01 May 1993
Journal of Paleontology (1993) 67 (3): 447–474.
Series: SEPM Field Trip Guide
Published: 01 January 1985
DOI: 10.2110/sepmfg.04.170
EISBN: 9781565762794
...Abstract Abstract The Greenhorn Cyclothem has become the model for eustatically-generated, third-order, cyclic sedimentation in Cretaceous epicontinental settings. The Rock Canyon Anticline sequence near Pueblo, Colorado, is the standard reference section for this cyclothem. The Greenhorn...
Series: SEPM Field Trip Guide
Published: 01 January 1985
DOI: 10.2110/sepmfg.04.100
EISBN: 9781565762794
...Abstract Abstract The Lincoln Limestone Member of the Greenhorn Limestone is characterized by calcareous shale and calcarenite beds deposited during the transgressive phase of the Greenhorn Cyclothem. At Rock Canyon anticline the Lincoln Member is conformably underlain by the Graneros Shale...
Series: GSA Special Papers
Published: 01 January 1994
DOI: 10.1130/SPE287-p43
...; and (4) upward transition into deltaic and marginal-marine facies. The Woodbury Member is of Cenomanian age, and is interpreted to have aggraded in response to sea-level rise in the adjacent seaway during transgressive phases of the Greenhorn Cyclothem, with progressive eastward displacement of nonmarine...
Journal Article
Journal: GSA Bulletin
Published: 01 July 1994
GSA Bulletin (1994) 106 (7): 892–902.
...WILLIAM P. ELDER; EDMUND R. GUSTASON; BRADLEY B. SAGEMAN Abstract Upper Cretaceous limestone-shale couplets developed within the late transgressive stage of the Greenhorn cyclothem may be correlated from carbonate-dominated (basinal) sequences in central Kansas and Colorado westward to clastic...
Journal Article
Journal: GSA Bulletin
Published: 01 October 1986
GSA Bulletin (1986) 97 (10): 1239–1249.
...DAVID K. WATKINS Abstract Two distinctive, laterally traceable bentonite beds were used to construct three isochronous time slices through the marine sediments of the Upper Cretaceous Greenhorn Cyclothem of the Western Interior Basin. Calcareous nannofossil assemblages from these time slices were...
Journal Article
Journal: AAPG Bulletin
Published: 01 April 1984
AAPG Bulletin (1984) 68 (4): 538.
...David K. Watkins ABSTRACT Two distinctive, laterally traceable bentonite beds were used to construct two isochronous time slices through the marine sediments of the Upper Cretaceous Greenhorn cyclothem of the United States Western Interior basin. Calcareous nannofossil assemblages from these time...
Series: SEPM Field Trip Guide
Published: 01 January 1985
DOI: 10.2110/sepmfg.04.184
EISBN: 9781565762794
..., and become a single regional unconformity, bringing pelagic Fort Hays limestones, representing maximum transgression and eustatic rise, into erosional contact with maximum regressive shoreface sandstones (Codell) of the underlying Greenhorn Cyclothem. Eight molluscan biozones are defined within the complex...
Journal Article
Journal: AAPG Bulletin
Published: 01 January 1982
AAPG Bulletin (1982) 66 (1): 71–90.
...Michael McLane ABSTRACT The Codell Sandstone Member of the Carlile Shale in south-central Colorado is a coastal deposit forming the upper part of the regressive phase of the Upper Cretaceous Greenhorn cyclothem. These beds consist of fine-grained sandstones and lesser amounts of silty shale...
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Series: GSA Special Papers
Published: 01 January 1994
DOI: 10.1130/SPE287-p97
... (Cenomanian to Campanian) paleogeography. In southwestern Minnesota, the Greenhorn cyclothem is partly represented by an eastward transition from mostly marine strata of shelf and nearshore environments to mostly nonmarine strata of fluvial and deltaic depositional environments. Rocks of subsequent...
Journal Article
Journal: AAPG Bulletin
Published: 01 April 1984
AAPG Bulletin (1984) 68 (4): 542.
...Frederick B. Zelt ABSTRACT Gamma-ray spectrometry was conducted on outcrops of marine shale and chalk deposited in the Cretaceous Western Interior seaway. Study of the Cenomanian-Turonian Greenhorn cyclothem of Colorado, New Mexico, and Utah showed that profiles of gamma-ray spectra are useful...
Image
—Early Turonian paleogeography and paleolatitude of North America. Map show...
Published: 01 September 1984
Figure 2 —Early Turonian paleogeography and paleolatitude of North America. Map shows inferred maximum extent of Western Interior seaway during deposition of Greenhorn cyclothem (shoreline dashed where shallow water deposits are not preserved). Paleogeographic reconstruction of seaway is based
Journal Article
Journal: PALAIOS
Published: 01 February 2000
PALAIOS (2000) 15 (1): 81–82.
... et al., who develop paleoecologic interpretations based on the foraminifers from the Greenhorn Cyclothem, comparing data from the Escalante core to those from outcrop sections in Black Mesa, Arizona, and Mesa Verde, Colorado. They note that benthic foraminiferal compositions track fourth-order...
... will examine outcrops of each stratigraphie unit in the Kiowa-Skull Creek, Greenhorn, and Niobrara Cyclothems in the Pueblo-Canon City area. Field examination will focus on high-resolution stratigraphie concepts, facies characteristics, geochemical profiles, and inferred depositional environments...
Journal Article
Published: 01 September 2003
Journal of Paleontology (2003) 77 (5): 1011–1015.
... . Kirkland , J. I. 1990 . The paleontology and paleoenvironments of the Middle Cretaceous (Late Cenomanian-Middle Turonian) Greenhorn Cyclothem at Black Mesa , northeastern Arizona . Unpublished Ph.D. dissertation, University of Colorado , Boulder , 1320 p. Kirkland , J. I. 1996...
FIGURES
Series: SEPM Field Trip Guide
Published: 01 January 1985
DOI: 10.2110/sepmfg.04
EISBN: 9781565762794
Journal Article
Journal: AAPG Bulletin
Published: 01 May 1982
AAPG Bulletin (1982) 66 (5): 543–544.
...Allen W. Archer; Donald E. Hattin Diversity and abundance of trace fossils in strata of the Greenhorn and Niobrara cyclothems of west-central Kansas, southern Colorado, and south-central Utah have been used to quantify trace-fossil assemblages. Recognition of assemblages is based on use...
Journal Article
Journal: AAPG Bulletin
Published: 01 February 1971
AAPG Bulletin (1971) 55 (2): 364.
...Charles T. Siemers Abstract Sedimentary deposits within the upper 40–100 ft of the Dakota Formation exposed in Russell County, Kansas, record deposition in an environmentally diverse deltaic setting developed during the initial stages of the Greenhorn marine cyclothem. The lower two thirds or more...
Journal Article
Published: 01 May 2000
Journal of Sedimentary Research (2000) 70 (3): 700–714.
... concretions in the upper part of the Blue Hill Member of the Carlile Formation of the Greenhorn Cyclothem. The concretions are well exposed in two localities in Lake Pueblo State Park, located approximately 5 km west of Pueblo, as well as in numerous localities throughout the Utah-Colorado region ( Fig. 1...
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