PaleoNet: Mineralogy of fossil remains

[brcgranier at free.fr]

Dear PaleoNetters,

I have a special enquiry (please respond to me directly, not to the 
whole PaleoNet members ... I should provide a table at the end):

Can you help me sorting out the mineralogy (aragonite, calcite, both of 
them) of some fossil groups?

For instance, to my knowledge, most (all?) Bryozoan remains are calcitic 
(when mineralized). Do you know aragonitic ones (please provide a 
bibliographic reference supporting such evidence)?

For instance, to my knowledge, most (all?) Gastropoda remains are 
aragonitic (when mineralized). Do you know calcitic ones (please provide 
a bibliographic reference supporting such evidence)?

For instance, to my knowledge, most (all?) Cephalopod remains are 
aragonitic (when mineralized). Do you know calcitic ones (please provide 
a bibliographic reference supporting such evidence)? In this case it 
could be both because Aptychi and Rhyncholites are calcitic.

Same question for Porifera, Hydrozoa, Octocorallia, Zoantharia, 
Stromatoporoidea, Brachiopoda, and Arthropoda.

Thanks in advance for your appreciated help.

Bruno Granier
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