Montana
- Panoramic view of the Belt Supergroup from Swiftcurrent Glacier trail, Glacier National Park, Montana, showing pale grey carbonates of the Altyn Formation, grey-green siltstones of the Apikuni Formation, red shales of the Grinnel Formation, and buff-colored dolostones of the Helena Formation.
- View of the Helena Formation at Grinnell Glacier. The prominent dark grey stripe is a 30 meter thick diorite sill that intrudes the Helena Formation. Thin while layers above and below the sill are baked carbonates of the Helena Formation.
- Molar-tooth structure in the Helena Formation, Belt Supergroup. An enigmatic structure, MT consists of a variety of spherical to sheet-like voids filled with an unusual carbonate microspar. Although the origin of MT is still uncertain, Research of my student, Mark Pollock, is giving us a lot of insight on how substrate rheology controls MT morphology.
- In this unusual example, molar-tooth structure has invaded a large domal stromatolite, resulting in a very unusual microbialite microfabric.
- Undergraduate students from the State University of West Georgia relaxing for a minute before going back to measuring cycles in the Helena Formation and collecting samples for organic carbon isotopic analysis.
- Graduate student Mark Pollock in the field with Linda and colleague Julie Bartley. After a week in the field, Mark was doing fine by himself, so Julie and I headed back home and left Mark out for another 4 weeks.
Linda Kah
Department of Earth and Planetary Sciences
1412 Circle Drive
Knoxville, TN 37996-1410
Phone: (865) 974-6399
Email: lckah@utk.edu