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Author Topic:   Depositional Models of Sea Transgressions/Regressions - Walther's Law
Taq
Member
Posts: 8523
Joined: 03-06-2009


Message 54 of 533 (725697)
04-30-2014 5:25 PM
Reply to: Message 53 by Faith
04-30-2014 3:25 PM


Re: Rox's post on related things
Seems to me that to turn sand dunes into a flat rock, and it IS flat and straight to the naked eye, couldn't happen by new sediments covering them over -- they would simply fall over the dunes into the valleys.

If you cut away a real life, modern sand dune, this is what you see.


http://www.esci.umn.edu/...1/Summer_Session/CourseReview.htm

Look at that. They are absolutely flat.

Edited by Taq, : Added credit for picture, which is a great website btw.


This message is a reply to:
 Message 53 by Faith, posted 04-30-2014 3:25 PM Faith has replied

Replies to this message:
 Message 56 by Dr Adequate, posted 04-30-2014 6:57 PM Taq has taken no action
 Message 57 by RAZD, posted 04-30-2014 7:03 PM Taq has replied
 Message 59 by Faith, posted 05-01-2014 1:22 AM Taq has taken no action

  
Taq
Member
Posts: 8523
Joined: 03-06-2009


Message 58 of 533 (725707)
04-30-2014 7:36 PM
Reply to: Message 57 by RAZD
04-30-2014 7:03 PM


Re: Rox's post on related things
Faith's hypothesis is that it would remain intact as the sea transgresses over them,

You mean Faith actually thinks that water will leave loose sand at such steep angles of repose? Seriously?

How about visiting any beach in the world. Look at where the sea meets the sandy beach. Notice the absolute absence of any sand dunes with 30 degrees of slope where the water is bashing up against the sand.

If Faith can't even get this simple observation right . . .


This message is a reply to:
 Message 57 by RAZD, posted 04-30-2014 7:03 PM RAZD has seen this message

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