21 April 2010
Blobiform
Posted by Callan Bentley
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…
Callan Bentley is Associate Professor of Geology at Piedmont Virginia Community College in Charlottesville, Virginia. He is a Fellow of the Geological Society of America. For his work on this blog, the National Association of Geoscience Teachers recognized him with the James Shea Award. He has also won the Outstanding Faculty Award from the State Council on Higher Education in Virginia, and the Biggs Award for Excellence in Geoscience Teaching from the Geoscience Education Division of the Geological Society of America. In previous years, Callan served as a contributing editor at EARTH magazine, President of the Geological Society of Washington and President the Geo2YC division of NAGT.
…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