Re: Fossil preservation techniques and materials, a short question

[oneal1@xxxxxxxx (David W ONeal)]

On Tue, 3 Jun 1997 18:07:12 -0700 (PDT) FossilDude@aol.com writes:
>I have a question concerning the best method of removing delicate 
>fossils from a hard micrite mud matrix (black limestone, incase some of
you 
>are more familiar).  This matrix is very hard, and it fractures
conchodially, 
>and in it are some very delicate ammonoids I am to study this summer.  I
have 
>been chipping away at these samples with a hammer, and it frustrates me 
>when I look at a newly chipped edge to find a nice large ammonoid, not
in so 
>good a shape.  So, I figure I would do well in investing in a dental
drill, 
>or other drill of some sort.  I was wondering if anyone here could point
me in 
>the direction of a reasonably affordable set up.
>
>JH

You might try an inexpensive electric engraving tool - they work like a
mini-jackhammer - and are available at virtually any hardware store.

Another method for removing limestone matrix is with a weak acid
solution.. however test this method to make sure the acid will not
dissolve the fossil also.

..... the best tool to use on fine work - is patients...  :)

ONeal