Fibrous or Needlelike Mineral Growth in Orthospirifer

While sorting Devonian brachiopod specimens for upcoming posts on beekite and internal coral growths I came across this oddity.  It appears to be a needlelike or fibrous mineral that grew inside the fossil. 

Looking at the list of Indiana minerals that are needlelike are: aragonite (calcium carbonate), strontianite (strontium carbonate --RARE), and geotite (iron oxide in water).  Indiana minerals that are fibrous are gypsum (calcium sulphate in water).  So I think it is either gypsum or aragonite.  Any suggestions as to what mineral this might be?

The material does not respond to long or short wave UV.

This Orthospirifer brachiopod was found in the Jeffersonville Limestone of Clark County, Indiana.

Additional photographs show specimen plus it magnified 20x with a loupe, 40x & 100x with a microscope.

Dendrites - Plant Pseudofossil?

While at the home and garden supply store picking up concrete materials, this rock was in the landscaping area.  I could not let it get torn up so I saved it from becoming part of a walkway.  Not sure where it came from or exactly what it is. The rock is in layers in a pinkish-red color with dendrite patterns through out.  On one edge is a collection of small crystals.  If the rock could be split it appears more layers have the dendrite pattern.

Funky Old Leptaena

The funky old Leptaena brachiopod fossil to paraphrase the name of Tone Loc song's Funky Cold Medina.  The Leptaena waldronensis brachiopods found in the Waldron Shale of Clark County, Indiana are quite fragile.  The glue stick needs to be used to hold the shell pieces in place when one of this size is found.

What one might not realize is how tall these creatures were in relation to other brachiopods of the time.  Also one finding them does not since most that are found are compacted or partials.  This specimen somewhat demonstrates this though part of its shell/imprint is missing.

These next images are of a different Leptaena waldronensis as one might tell with the different lighting used.  Also some of these images were not stacked with Helicon Focus software. 

Creatures existed in the Middle Silurian wild time.