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Author Topic:   The Story in the Rocks - Southwestern U.S.
jar
Member (Idle past 421 days)
Posts: 34026
From: Texas!!
Joined: 04-20-2004


Message 115 of 121 (782111)
04-16-2016 3:50 PM
Reply to: Message 114 by edge
04-16-2016 3:29 PM


edge writes:
jar writes:
And finally there is sandstone at the current surface. If that is correct, how did the sandstone instead of soil or marsh or bog or woodland like we see when we walk around today get to be the current surface?
Well, not necessarily, but sandstone, being more resistant to erosion would tend to protect whatever is beneath it.
Here is a hoodoo showing how a cap rock of sandstone can resist erosion from above and protect a column of mudstone or ash below it.
I understand that but how can sandstone be the top layer instead of the soil and dirt and loam and sand and pebbles be a top layer?
Can sandstone form at a topmost layer or the surface?
Edited by jar, : fix attribution edge not edfe

Anyone so limited that they can only spell a word one way is severely handicapped!

This message is a reply to:
 Message 114 by edge, posted 04-16-2016 3:29 PM edge has replied

Replies to this message:
 Message 116 by edge, posted 04-16-2016 4:13 PM jar has not replied
 Message 117 by edge, posted 04-23-2016 4:38 PM jar has not replied

  
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