Thursday, March 26, 2015

Seismic Sequence Stratigraphy chapter 2

There are lessons here for the ways in which we correlate wells. The dependence of the depositional process on varying current velocites dictates that sands must be accumulated episodically. The time gap between successive depositional episodes will depend on the process causing the current velocity ( tides, storms, earthquakes, etc). Whatever the process, it is clear that sands cannot be deposited in the continual manner that is theoretically possible for clay-sized grains.

Clays-sized grains, on the other hand, do have the potential to be deposited continually from suspension load in areas of the basin where current activity is low, although only modest currents may be required to retain nall clay-sized grains in suspension.

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