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Re: Dragonfly nymph (naiad)
Posted by Keith Sharon Thompson on February 23, 1998 at 15:28:30: In Reply to: Re: Dragonfly nymph (naiad) posted by guide on February 22, 1998 at 21:37:38: The whole nymph was inside the nodules. The nodules have
several characteristic shapes and vary between +/- 4-6cm. It takes between
3-7 days to dissolve the concretions using the dilutions we used. A change
of the HCl was usually necessary midway. There is no need to use resin to
cover the specimens as they are composed of silicon dioxide in the form
of chalcedony.
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