Central Montana Alkalic Province
Dan examines unusual layering at Crown Butte.
Jesse, Breck, and Jim at Square Butte.
Jim and Breck investigate syenite and shonkinite at Square Butte.
Dan sampling syenite at the Shonkin Sag Laccolith.
For more information on field experiences in Montana, contact Phillip Ihinger at firstname.lastname@example.org.