Date: Sat Sep 27 2003 - 22:41:36 EDT
Austin has a picture of a 15-foot diameter, 200-ton boulder from the
Shinumo Quartzite in the base of the Tapeats Sandstone, in his Grand
Canyon book (p 46). "Arthur Chadwick surveyed hills of bedrock covered
with boulder and sand beds. These were interpreted by Chadwick as
catastrophic underwater debris flows, which were able to move boulders
ten feet in diameter more than a quarter mile." (p 47)
On Fri, 26 Sep 2003 09:04:36 -0500 "Glenn Morton"
The interesting thing about all these is their rarity in the geologic
column compared with the sorted sediments and precipitates. Those who
believe in a global flood must deal with this issue. On the whole,
however, I don't think they even know it exists.
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