From: Don Winterstein (dfwinterstein@msn.com)
Date: Fri Sep 26 2003 - 03:35:54 EDT
Conglomerates are sometimes very poorly sorted. You might expect poor sorting whenever you have a very energetic process but relatively little water per rock. Turbidites are well-sorted rocks that come from high energy processes, but they formed on sea bottoms. ("Marine landslides.")
Breccias from talus slopes can also be very poorly sorted. Any more?
Don
----- Original Message -----
From: bivalve
To: asa@calvin.edu
Sent: Thursday, September 25, 2003 2:28 PM
Subject: unsorted sediment
Variants on the landslide theme, not exactly landslides, can be rather poorly sorted-e.g., brecchia due to cave collapse. Apart from things like that, I am not thinking of many options.
The mud slurry idea has problems with the survival of organisms in it. Fine mud will clog up most organisms, which is part of why putting a dam on a river is such a good way of killing off native river-dwelling mollusks.
Dr. David Campbell
Old Seashells
University of Alabama
Biodiversity & Systematics
Dept. Biological Sciences
Box 870345
Tuscaloosa, AL 35487-0345 USA
bivalve@mail.davidson.alumlink.com
That is Uncle Joe, taken in the masonic regalia of a Grand Exalted Periwinkle of the Mystic Order of Whelks-P.G. Wodehouse, Romance at Droitgate Spa
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