23 June 2011

Bookshelfing in the Rockfish Conglomerate

Posted by Callan Bentley

Another thing I saw last week in the Rockfish Conglomerate were several nice examples of “bookshelfing,” which is when a rock or mineral fractures into pieces, and the pieces slide down relative to their neighbors, like a set of encyclopedias slumping outward on a bookshelf. This has the effect of shortening the grain/clast in one direction, and elongating it in another direction:

Ever seen anything like that? If so, where? What was the context?