Comparisons commonly help sharpen our observations and interpretations in depositional environments. It is appropriate here to compare shallow marine/shelf environments with the next major sandstone depositional environments to be found in a seaward direction -- classical deep water turbidite systems. The need for such a comparison is apparent from the problems raised in my paper on “Geological Evidence for Storm Transportation and Deposition on Ancient Shelves,” this volume.
We may decide to compare individual beds, groups of beds traced laterally, or groups of beds in vertical sequences. However, it has been shown earlier in this volume that the turbidity current process can operate on the shelf, and that preservable turbidites can be deposited in shallow seas. Deciding what to compare is not so simple as it might first appear.
Figures & Tables
Shelf sandstone reservoirs are becoming a more and more common exploration target. What they are, how they may be characterized, and how they differ from shoreline and deep-water deposits in the subject of this publication. Shelf sands and sandstone reservoirs are among the more poorly understood types of sandstones. Continental, shoreline and deep water sandstones have all been studied in much more depth than have shelf sands and sandstones. However, during the last fifteen years significant progress has been made in understanding shelf sands and sandstones. Studies of modern sediments have allowed us to understand many of the depositional processes active on the shelf. This book is intended to be an up-to-date summary of shelf processes and products. The papers are intended for those new to shelf sands and sandstones as well as the shelf specialist.