Whilst poking about Sunday on the fine exposures along West Virginia’s new route 55, my structural geology students and I noticed some joint surfaces decorated with pyrolusite dendrites. But I also found a nice slab which had one surface covered with a thicker coat of manganese oxide, and here the habit was botryoidal, like little bunches of grapes. A few photos for you:
Because I don’t care as much for minerals as I do for structures, I donated it to the mineralogy teaching collection at GMU…
…I don’t care as much for minerals as I do for structures…
I always knew you were a sensible chap.
could you please e-mail me a more exact location of the Pyrolusite along
Hwy. 55.
Thank you