6 December 2012
More xenoliths from the Boulder Batholith
Posted by Callan
The week before last, I showed you the Boulder Batholith, as it crops out southeast of Butte, Montana.
Today, I’ll share a few more photos of xenoliths (or perhaps microgranular mafic enclaves?) from that same outcrop:
Man, I miss that old Swiss Army knife. The damned security actors at Calgary Airport confiscated it last summer. 
Callan Bentley is an assistant professor of geology at Northern Virginia Community College in Annandale, Virginia. He is particularly interested in structural geology and the evolution of the Appalachian mountain belt. Callan draws cartoons and writes for EARTH magazine. He lives in the Fort Valley of Virginia.
