Re: Crystalling

Tom Martin and Hazel Clark (tomandhazel@azaccess.com)
Thu, 2 Oct 1997 12:44:32 -0700

Hi Dave, GCPBA would like to help in this. We are currently working with
the Park on getting private boaters on resource trips. This fall, gcpba
will have at least one board member (not me) on a resource trip. This is
the first step to outlining how privates and GCNPS can interface on
resource trips. Science is another great place to be of service. The Sierra
club is doing a cammel thorn eradication science trip with ARR supplied
boats next spring. GCPBA would like to assist privates to conduct good
science in the canyon. This can be done, and as a gcpba member, if you want
to spearhead this , lets do it. If you don't think gcpba is the right
organization to aide in this, no problem. Get whoever you think should help
in this to help out. It will be a great idea, no matter who is coordinating
and stearing this. Grand Canyon River guides is currently doing a project
photographing beaches. Cameras are supplied by the Grand Canyon Science
Center. Guides take pictures of specific beaches on their commercial
trips. So there you have it. This can be done, and should. tom martin

----------
> From: David Yeamans, CST-7, 5-8832, dryeamans@lanl.gov
> To: gcboaters@songbird.com
> Cc: riveraccess@hydrosphere.com
> Subject: Re: Crystalling
> Date: Thursday, October 02, 1997 10:59 AM
>
>
> >I think lots of beach erosion is caused by wind--witness the
> >rapid deterioration of the upland beach at Tapeats. Having
> >thought about this, I am reconsidering my earlier point,
> >that we should see perched remnant beachs from super-extreme
> >flows (c. 800k cfs, 1400-year return interval). They would
> >quickly blow away. But, fancy micro-crystal analysis might
> >still detect traces of sand derived from rocks in the upper
> >basin in locations where the only explanation is an extreme
> >flow. Look in wind- and runoff-sheltered areas at elevations
> >consistent with flows between 300k cfs and 800k cfs.
> >
> >Ben
>
>
>
> (assuming that the 1400 year interval does not place the flood so far
back
> as to fall within previous pluvial cycles that would invalidate modeling
> based on recent historic flows and climate)
>
> Ben, you've hit on a perfect private boater professional science project.
> With very little training, a crew could scout ancestral beaches and take
> 0.1-gram samples, logging in their locations. Samples could be
transported
> and analyzed off-site. The person with the burning need to know this
> information would finance the analysis but the sample collection would be
> free.
>
> I can see reluctance on the part of NPS to have hordes of TEVA-clad
> youngsters scrambling over the cryptogamic soils in search of sand, but
they
> can be made to realize that private boaters have a sensitivity for the
> canyon as a Cathedral that sedimentologists on a field trip would not.
>
> If anybody in this server is from NPS and knows about the planning of
> science trips, could you inform the other users of the canyon about
future
> plans? We can help you and we can shorten the wait list a bit in the
process.
>
> Dave Yeamans
>
>
> =========================================================
> To unsubscribe from RiverAccess, send a message to
majordomo@hydrosphere.com containing the following: unsubscribe riveraccess

====================================================================
To subscribe, send email to majordomo@songbird.com, with "subscribe
gcboaters" as the only line in the message body. To unsubscribe send
"unsubscribe gcboaters". For further information send "info
gcboaters", or see http://www.songbird.com/gcboaters
====================================================================