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Published via the yankee Geophysical Union as a part of the Field journey Guidebooks Series.

The moment subject makes a speciality of top Cretaceous coastal and shallow marine rocks as displayed via exposures within the striking e-book Cliffs of Utah. The shelf and shoreface sequences obvious in those rocks signify the various classical exposures of such facies within the usa. as a result of excessive premiums of sediment yield from the within reach actively uplifting Cretaceous Sevier orogenic belt, the Mesaverde staff within the publication Cliffs is ruled by means of regressive sequences, punctuated through locally huge unconformities.

Content:
Chapter 1 Deltaic and Lacustrine Facies of the fairway River Formation, Southern Uinta Basin, Utah (pages 1–11): Robert R. Remy
Chapter 2 Stratigraphy and Sedimentation of the booklet Cliffs, Utah (pages 13–24): Rex D. Cole and James F. Friberg
Chapter three Coastal and Shallow Marine Cyclicity (pages 25–33): Robyn Wright, Danny Katzman, Melissa J. Montz and Robert S. Zech
Chapter four Depositional structures structure of Shallow Marine Sequences (pages 35–79): Dag Nummedal, Robyn Wright, Donald J. P. quick, Roderick W. Tillman and Niels R. Wolter

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Concerning the ProductPublished by means of the yankee Geophysical Union as a part of the sphere journey Guidebooks sequence. content material:

Additional info for Cretaceous Shelf Sandstones and Shelf Depositional Sequences, Western Interior Basin, Utah, Colorado and New Mexico: Salt Lake City, Utah to Albuquerque, New Mexico June 30-July 7, 1989

Sample text

A ravinement sur­ face lies directly above the Torrivio Sandstone, sep­ arating this fluvial sandstone from the overlying Tocito Sandstone and the Mulatto Tongue of the Mancos Shale. The Gallup Sandstone at this outcrop is characterized by an upward-coarsening trend, from 125 lm at the base to about 250 lm at the top (Figs. 4-6 and 4-7), moderately well-sorted quartzose sandstone and sparse to common burrows of the species Ophiomorpha nodosa, Thalassinoides sp. and related common shallow marine traces.

5 Cyclicity in the Point Lookout Sand­ stone Evident in both the field trip stops and the drive south from Cortez has been the repetitive vertical stacking of Point Lookout shoreface deposits at different spatial scales. Because our work in this area is prelim­ inary we have stopped short of assigning a numerical hierarchy to the cycles; however, we are currently testing the hypothesis that individual high-frequency shoreface cycles are "bundled" into larger subsets within the Point Lookout Sandstone.

Dr. C. W. Hoskins and Mr. W. A. Chisholm were involved in early stages of the field work. Technical reviews by Tim Lawton, Rod Tillman, and Robyn Wright are greatly appreciated. T119 CHAPTER 3. COASTAL AND SHALLOW MARINE CYCLICITY Robyn Wright 1, Danny Katzman*, Melissa J. Montz^, Robert S. Zech^ CYCLE RANKING Repetitive lithologic, biologic, and chemical patterns in sedimentary rocks have long challenged geological observers to decipher causal mechanisms. From the days of Gilbert [1895, 1900] geologists have sought to explain order in the stratigraphic record where bedding patterns suggested non-random sequential pro­ cesses.

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Cretaceous Shelf Sandstones and Shelf Depositional
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