Re: Piedmont geology question

From: Jo Schaper (joschapern4ospam_at_2socketdot.no5net)
Date: 10/31/04 

Date: Sun, 31 Oct 2004 08:54:30 -0600

"piedmont" is a geomorphical term. Please define which piedmont you are
speaking of.

Ookie Wonderslug wrote:
> How deep was the sediment in the piedmont originally? I have heard
> somewhere that as much as a mile of sediment may have eroded away from
> the piedmont area.
>
> Why do I ask? Well, I want to know if this is possible:
>
> Meteor impacts piedmont. Creates large crater. Impact cracks bedrock
> and sediments about a mile below ground. Crater completely erodes
> away. Fractures below the center of crater expand with erosion
> creating smaller area of deep gullies and valleys directly below the
> center of where crater once was.
>
> Could there be places where a semicircular area of intense erosion
> (compared to surrounding areas) are the result of fracturing caused by
> impact far above the current surface?
>
> Could this be proven by going "down river" and finding sand and
> sediment that have been shocked by the impact and then eroded away?
> How deep would one need to drill cores into the continental shelf and
> how far out would one need to drill to find this evidence? Has
> extensive core sampling been done already on the eastern continental
> shelf? Or is this all just another silly idea that is going to go
> nowhere?

Relevant Pages

  • Re: Piedmont geology question
    ... > How deep was the sediment in the piedmont originally? ... > somewhere that as much as a mile of sediment may have eroded away from ... Creates large crater. ... > creating smaller area of deep gullies and valleys directly below the ...
    (sci.geo.geology)
  • Piedmont geology question
    ... How deep was the sediment in the piedmont originally? ... Creates large crater. ...
    (sci.geo.geology)
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