Giant oolites from the Beck Spring Formation (ca. 723 Ma) very near Saratoga Springs in Death Valley, California.

Data taken from this section and a discussion of the general Neoproterozoic geology of Death Valley can be found in a GSA Bulletin article by Corsetti and Kaufman (2003).

To see these ooids uncut, click here: gigapan.com/gigapans/105569

Contributed by Dr. Jay Kaufman of University of Maryland.