Statemap 2014-15 Update

Hello all,

Just wanted to let you know that the Statemap 2014-15 field mapping project has resulted in the publication of three new geologic maps.  These are the Parma, Prim, and Greers Ferry quadrangles.  Reduced images are posted below.  These should be available as .pdfs on our website in the near future.  I’ll keep you posted!

Parma Quadrangle

Prim Quadrangle

Greers Ferry Quadrangle

Also, I would like to thank the many people who helped with data collection in the field this year, without whom this project would have been impossible.

Andy Haner                                                        Danny Rains

 

Angela Chandler                                                                     Stefanie Domrois

 

Doug Hanson                                  Ty Johnson

Thanks, everyone!

 

Now it’s off to the Brownsville quad for next year!

Richard Hutto

Geopic of the week: well exposed fault

The picture above shows a normal fault exposed in an old railroad grade just north of Greers Ferry lake in the Ozark Mountains of central Arkansas.  Two different lithologies are juxtaposed against one another: siltstone on the left and sandstone on the right.   Exposures such as this one are relatively rare in the Ozarks where most of the bedrock is covered by loose sediment and vegetation.

This fault is extensive and roughly parallels the northern portion of Greers Ferry lake.  The fault gives the northern portion of the lake its linear shape (see below).