Not likely a meteor-- it's too conical, and has no sign of a rim or nearby ejecta. Always hard to judge scale and angles in these kinds of images... anyway, my guess is that the underlying lava tube had a partial collapse on its own, causing the sand/regolith to funnel in. -Tenzin
On Thu, Aug 18, 2011 at 11:23 AM, Lee H. Skinner <skin...@thuntek.net>wrote: > Could this entrance have been triggered by a meteor falling over a lava > tube? > > http://hirise.lpl.arizona.edu/**ESP_023531_1840<http://hirise.lpl.arizona.edu/ESP_023531_1840> > > and click on this one in your browser for maximum detail: > > http://hirise.lpl.arizona.edu/**images/2011/details/cut/ESP_** > 023531_1840.jpg<http://hirise.lpl.arizona.edu/images/2011/details/cut/ESP_023531_1840.jpg> > > Lee Skinner > > ______________________________**_________________ > SandiaGrotto mailing list > sandiagro...@caver.net > http://caver.net/mailman/**listinfo/sandiagrotto_caver.**net<http://caver.net/mailman/listinfo/sandiagrotto_caver.net> >
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