"Some years ago" would be in the 1960-70's. When Carol Hill described
them in her first Cave Minerals book we thought they were mostly known
in one of southern Arizona's caves which was also compared to the
Caverns of Sonora. Several of us from TX made a trip to see this new
speleothem. It was no "Sonora", but there were quite a few shields.
Then in the next few years everyone started noticing them in their own
favorite caves. I don't know if anyone is keeping data on such
speleothem location or now.
- Pete
On Jan 17, 2010, at 7:28 AM, Tone G wrote:
I recall some years ago—I think in a show cave called Colossal Cave in
Arizona—a tour guide mentioned that "cave shields" are somewhat rare.
Since then, I seem to see them frequently enough.
I am wondering if anyone has empirical data, or even an educated
guess, that considers the rarity or abundance of cave shields.
\Tone
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