I would think that it's primarily Austin Chalk in that part of town
(Geologic map's not handy, but that's my memory) which is too soft
hereabouts to support caves. It's doubtful they'd encounter any around
there.
It seems the eastermost caves in the county are probably along the
Shoal Creek line.
On Aug 2, 2012, at 1:02 AM, Justin Haynes wrote:
Is anyone keeping up with this tunnel from a geological perspective?
At 85 feet deep and ~20 feet in diameter, I wonder about the rock
there and if they are likely to hit any caves. I also wonder if they
know whether or not they will hit any caves and what could possibly
happen if they do so. Is there any typical features of caves that
exist that close to the Colorado River? Is such a cave likely in this
area?
http://www.tunneltalk.com/Waller-Creek-Apr11-Austin-Waller-Creek-flood-tunnel.php
http://www.espeyconsultants.com/projects/waller_creek.php5
Thanks,
Justin
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