I was going to say the exact same thing. Susan Hewitt > On Nov 16, 2023, at 7:20 PM, Allen Aigen <[log in to unmask]> wrote: > > Probably the encrustations are from calcareous algae which grows best with lots of light, like in shallow water. > Allen Aigen > Staten Island NY > > On Thursday, November 16, 2023 at 05:02:16 PM EST, John Varner <[log in to unmask]> wrote: > > > Is it my imagination, or are shells found in shallow water more likely to be encrusted with calcium deposits? And why is that? > ---------------------------------------------------------------------- [log in to unmask] <mailto:[log in to unmask]> - a forum for informal discussions on molluscs To leave this list, click on the following web link: http://listserv.uga.edu/scripts/wa-UGA.exe?SUBED1=conch-l-L&A=1 Type your email address and name in the appropriate box and click leave the list. ---------------------------------------------------------------------- > ---------------------------------------------------------------------- [log in to unmask] <mailto:[log in to unmask]> - a forum for informal discussions on molluscs To leave this list, click on the following web link: http://listserv.uga.edu/scripts/wa-UGA.exe?SUBED1=conch-l-L&A=1 Type your email address and name in the appropriate box and click leave the list. ---------------------------------------------------------------------- ---------------------------------------------------------------------- [log in to unmask] - a forum for informal discussions on molluscs To leave this list, click on the following web link: http://listserv.uga.edu/scripts/wa-UGA.exe?SUBED1=conch-l-L&A=1 Type your email address and name in the appropriate box and click leave the list. ----------------------------------------------------------------------