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Book Chapter

Geological Evidence for Storm Transportation and Deposition on Ancient Shelves

By
Roger G. Walker
Roger G. Walker
Dept. of Geology, McMaster University, Hamilton, Ontario L8S 4M1, Canada
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Published:
January 01, 1985

Abstract

This paper is designed to review the geological evidence for storm deposits, and will only peripherally discuss modern processes. The papers in this volume by Swift give excellent coverage of the day-by-day and year-by-year processes which operate on modern shelves. However, the rarer events have a low probability of being observed or measured, yet the deposits of such events are probably abundant in the geological record. Thus, the record adds to, as well as compliments the body of knowledge acquired by oceanographers and marine geologists. It will be suggested, for example, that turbidites occur in ancient shallow marine situations, commonly with a periodicity of about 1000–10,000 years. There are no well established examples of modern turbidity currents that have deposited preservable beds in a shelf or shallow marine situation. It must be emphasized, therefore, that the geologist will inevitably have a different perspective on shelf storm deposits from that of a geological oceanographer.

This part of the notes is chronologically subdivided as follows:

  1. 1899, Silurian storm deposits in New York State; discussion of G. K. Gilbert's deduction of 20 m storm waves in the Medina ocean.

  2. 1967, Hurricanes Carla and Cindy. The work of Hayes can be taken as the beginning of “modern” geological studies of storm deposits.

  3. 1971-1975, Miscellaneous storm deposits. In this section, several storm interpretations are introduced, emphasizing both the nature of the deposit and the emplacing mechanism.

  4. 1975, Hummocky cross stratification. This sedimentary structure, present in both siliciclastic and carbonate rocks, is

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Contents

SEPM Short Course Notes

Shelf Sands and Sandstone Reservoirs

R. W. Tillman
R. W. Tillman
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D. J. P. Swift
D. J. P. Swift
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R. G. Walker
R. G. Walker
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SEPM Society for Sedimentary Geology
Volume
13
ISBN electronic:
9781565762428
Publication date:
January 01, 1985

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