The Henefer Formation is composed of pebble-, cobble-, and in some places even 9-foot-diameter boulder-size clasts of mostly sandstone and quartzite. Photo courtesy of Amanda Wilkerson.

The Henefer Formation is composed of pebble-, cobble-, and in some places even 9-foot-diameter boulder-size clasts of mostly sandstone and quartzite. Photo courtesy of Amanda Wilkerson.

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