Is this the stuff that blackens dredged shells and also Hormospira
maculosa found in intertidal sand in Mexico? I have found that it comes
off if you brush it before it gets dry but won't come off later!
Peggy
On Jan 8, 2005, at 5:28 PM, Bernd Sahlmann wrote:
in 1960, JA Allen published an article titled "Manganese deposition on
the
shells of living molluscs", Nature, 185: 336-337 that described at
least the
black deposits on the tip of the scaphopod Dentalium entale containing
Manganese.
Peggy Williams: shell collecting trips
Visit my website: www.Shelltrips.com
PO Box 575
Tallevast FL 34270
(941) 355-2291
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