29 May 2015
Friday fold: Hayward neighbor
Posted by Callan Bentley
Reader Bill Mitchell contributed this week’s Friday fold, viewed here zooming in closer and closer over three photos:
Bill says:
Here we have a fold found along a trail in Strawberry Canyon just east of the University of California, Berkeley and the Hayward fault. It seems to be mapped (http://pubs.usgs.gov/mf/2000/2342/) as Cretaceous undivided (Great Valley sediments), but I wouldn’t be surprised if it were Claremont Chert (late to middle Miocene) or Claremont Shale (late Miocene). Superficially they are similar to the type section of the Claremont Shale, found just a canyon or two over, and perhaps too small to show on the geologic map.
Bill is on Twitter too: @i_rockhopper
Thanks for the contribution, Bill!
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.