General
Montana Math and Science Initiative geological road signs
Montana Bureau of Mines and Geology
Museum of the Rockies
Rising From the Plains, by John McPhee. Farrar, Straus, & Giroux, 1987.
Interactive geological map of the northern Rocky Mountain region (ESRI, 2010)
The Montana-Yellowstone Geologic Field Guide Database (SERC, 2010)

Tetons
Journey through the Past: geology of Grand Teton National Park. Park Service pamphlet (2 pages).
Mafic dike on Mt Moran (photo with caption)
Windows Into The Earth: The Geologic Story of Yellowstone and Grand Teton National Parks, by by Robert B. Smith and Lee J. Siegel. Oxford University Press, 2005.
Interpreting the Landscapes of Grand Teton & Yellowstone National Parks: Recent and Ongoing Geology, by John M. Good and Kenneth L. Price. Grand Teton Natural History Association, 2005.
Creation of the Teton Landscape (Love and Reed, 1971)

The Boulder Batholith and Butte
PitWatch, updated annually
"Butte, Montana: A mesothermal ore field," in An introduction to economic geology and its environmental impact by Anthony M. Evans
Facts about the Berkeley Pit (Butte) and mine flooding (Montana Tech)
Geology of the Butte mining district, Montana (Zeihen, et al., 1987)
Ringing rocks (YouTube video) And here's another one.
Mesozoic Idaho Batholith (DeGrey, Miller, & Link, 2010)

Basement complex
Beartooth Highway from GORP.com
Selected Features of the Precambrian rocks of the eastern Beartooth Mountains, Montana and Wyoming (Henry & Mogk)
Field trip along the Beartooth Highway (Henry & Mogk)
Plutonic complex of the Long Lake area, Beartooths (Mogk)
Mafic dikes of the Beartooths (Harlan)
Mafic dike on Mt Moran (photo with caption)
The Gunbarrel mafic magmatic event: A key 780 Ma time marker for Rodinia plate reconstructions, in Geology (Harlan, et al., 2003) [see also color map here]
Reference list for the eastern Beartooth Mountains
A study in contrasts: Archean and Quaternary geology of the Beartooth Highway, Montana and Wyoming (Mueller, et al., 1987)
Geologic Excursions into the Absaroka, Beartooth, and Bighorn Mountains, Wyoming and Montana (Carson, et al., 1998?)
Precambrian rocks - the core of the Tetons, in Creation of the Teton Landscape (Love and Reed, 1971)
United Plates of America (Hoffman, 1998)
Wyoming Terrane (poster by Henry, Mogk, & Mueller, 2005)
Idaho Basement Rocks (DeGrey & Link, 2010)
Trail Guide to Hyalite Peak, Bozeman, MT (Beers & Berndt, 2010)
Bear Basin Trail, Spanish Peaks Area, Northern Madison Range, near Big Sky, MT (Issacs, Danz, & Rendle, 2010)

Belt Supergroup
SEDEX - Synopsis of the Belt-Purcell Basin (Lydon) [especially the first 6 sections]
LaHood Formation - A Coarse Facies of the Belt Series in Southwestern Montana (McMannis, 1963)
Precambrian Sedimentary Environments: Special Publication Number 33 of the International Association of Sedimentologists, 2002
"Glacier National Park Geology and Paleontology: Part 1" on DinoChick Blogs, plus see Part 2, Part 3, Part 4, and Part 5. (Discusses the many kinds of stromatolites)
Geology along Going-to-the-Sun Road, Glacier National Park, Montana. Omar B. Raup, Robert L. Earhart, James W. Whipple, and Paul E. Carrara, Glacier Natural History Association, 1983.
Mesoproterozoic Belt Supergroup (Tapanila & Link, 2010)
Paleogeographic implications of non–North American sediment in the Mesoproterozoic upper Belt Supergroup and Lemhi Group, Idaho and Montana, USA (Stewart, et al., 2010)

Lewis Thrust and Distrubed Belt
Structural Geology of the Sawtooth Range at Sun River Canyon, Montana Disturbed Belt, Montana (Lageson, 1987)
The Lewis thrust fault and related structures in the Disturbed Belt, northwestern Montana (Mudge, 1980)
Geology along Going-to-the-Sun Road, Glacier National Park, Montana. Omar B. Raup, Robert L. Earhart, James W. Whipple, and Paul E. Carrara, Glacier Natural History Association, 1983.
Various Glacier-Waterton Park geology resources
Mesozoic Thrust Belt (Link & DeGrey, 2010)

Laramide Orogeny
Was the Laramide Orogeny related to the subduction of an oceanic plateau? (Livaccari, et al.) Nature, 1981.
Kinematic history of the Laramide orogeny in latitudes (Bird, 1998)
Art of science: Farallon Plate (Sigloch, 2008)
Cenozoic magmatism and the subduction of the Farallon slab (Ball, 2008)
Farallon Plate Remnants (NASA tomography)
Plume-slab Interaction beneath Yellowstone Revealed by Multiple-frequency Tomography (Tian, et al., 2010)
Two-stage subduction history under North America inferred from multiple-frequency tomography. (Sigloch, et al., 2008)

Beaverhead Impact Structure
Shock wave frozen in stone on rim of impact crater (Montana Earth Science Picture of the Week)

Basin and Range extension
"Basin and Range" in Yellowstone: A Visitor's Guide, p. 44
Western United States extension: how the West was widened (Sonder and Jones, 1999)
Basin and Range Province - Teritiary Extension (Digital Geology of Idaho, 2010)

Please let me know if any of these links no longer work.
This page was last updated on October 14, 2010. -CB

Karst and differential weathering
Lewis and Clark State Park
Wonderground (McMillion, 2004)

Glacial Lake Missoula
NOVA: Mystery of the Megaflood WGBH (Boston), 2005.
Multiple catastrophic drainage of Glacial Lake Missoula, Montana (Alt, 1987)
Photo of lakeshore "strandlines" on Mount Jumbo, Missoula
Photo of giant ripples in Camas Prairie area, north of Missoula
Field trip guide: Scablands and Continental Glaciations
Glacial Lake Missoula and Its Humongous Floods, by David D. Alt Mountain Press Publishing, 2001.
Bretz's Flood: The Remarkable Story of a Rebel Geologist and the World's Greatest Flood, by John Soennichsen, Sasquatch Books, 2008.
The Lake Missoula megafloods, post on the blog Highly Allochthonous, 2009.
The great flood, post on the blog Outside the Interzone, 2009.
Lake Missoula Floods (DeGrey & Link, 2010)

Earthquakes
Surface faulting associated with the 1983 Borah Peak earthquake at Doublespring Pass road, east-central Idaho (Crone, 1987)
The Hebgen Lake Earthquake Area, Montana and Wyoming (Witkind & Stickney, 1987)
Evaluation of Hazardous Faults in the Intermountain West Region (Crone, Haller, and Maharrey, 2009)
Cataclysm: When Human Stories Meet Earth's Faults (Huigen, 2009)
USGS photo library of Hebgen Lake earthquake aftermath (USGS)

Mass wasting
The Hebgen Lake Earthquake Area, Montana and Wyoming (Witkind & Stickney, 1987)
NOVA Geoblog: Madison River Landslide, Montana (Bentley, 2008)
The Montana Traveler: Madison River Earthquake Area (Holz, 2003)
Gigapan of the Madison River landslide (Schott, 2009)
Gigapan of the Gros Ventre landslide (Schott, 2009)

Glaciation
A study in contrasts: Archean and Quaternary geology of the Beartooth Highway, Montana and Wyoming (Mueller, et al., 1987)
Zone of interaction between Laurentide and Rocky Mountain glaciers east of Waterton-Glacier Park, northwestern Montana and south western Alberta (Karlstrom, 1987)
Glacier Retreat in Glacier National Park (USGS)
Repeat Photography Project (USGS)
Quaternary - Time of Ice, in Creation of the Teton Landscape (Love and Reed, 1971)
Various Glacier-Waterton Park geology resources
Pleistocene Mountain Glaciation (Link & Thackery, 2010)
Trail Guide to Sacagawea Peak, Northern Bridger Range, MT (Corthouts & Bent, 2010)
Trail Guide to Hyalite Peak, Bozeman, MT (Beers & Berndt, 2010)
Bear Basin Trail, Spanish Peaks Area, Northern Madison Range, near Big Sky, MT (Issacs, Danz, & Rendle, 2010)

Dinosaur paleontology
Dinosaurs (Museum of the Rockies)
Upper Cretaceous coastal plain sediments at Dinosaur Provincial Park, southeast Alberta (Koster & Currie, 1987)

Yellowstone
Interpreting the Landscapes of Grand Teton & Yellowstone National Parks: Recent and Ongoing Geology, by John M. Good and Kenneth L. Price. Grand Teton Natural History Association, 2005.
Windows Into The Earth: The Geologic Story of Yellowstone and Grand Teton National Parks, by by Robert B. Smith and Lee J. Siegel. Oxford University Press, 2005.
Geology Field Notes: Yellowstone National Park (NPS, 2005)
Yellowstone Volcano Observatory
Jake Lowenstern Interview (YouTube)
Yellowstone's Plumbing Exposed (University of Utah press release)
Yellowstone, Newberry, and lithospheric thickness (NOVA Geoblog)
Neogene Snake River Plain-Yellowstone Volcanic Province (Link, 2010)
Yellowstone - What Lies Beneath (Rowan, 2010)

Rockies Paleozoic & Mesozoic stratigraphy (Bridgers)
Stratigraphic column for the Gallatin Valley and Bridger Range (MSU)
Geologic Maps of Western and Northern Parts of Gallatin National Forest, South Central Montana (Wilson & Elliott, 1997)
Generalized correlation chart of Paleozoic, Mesozoic, and Cenozoic rocks, Yellowstone River Basin, in Environmental Setting of the Yellowstone River Basin, Montana, North Dakota, and Wyoming (Zelt, et al., 1999)
The Paleozoic Era, in Creation of the Teton Landscape (Love and Reed, 1971) Also see the section on the Mesozoic Era.
Rifting and the Passive Margin (Link & DeGrey, 2010)
Trail Guide to Sacagawea Peak, Northern Bridger Range, MT (Corthouts & Bent, 2010)

Absaroka Volcanics (Eocene)
"Absaroka Volcanics" in Yellowstone: A Visitor's Guide, p. 40
Geologic Excursions into the Absaroka, Beartooth, and Bighorn Mountains, Wyoming and Montana (Carson, et al., 1998?)
"Geology" in Environmental Setting of the Yellowstone River Basin, Montana, North Dakota, and Wyoming (Zelt, et al., 1999)
Trail Guide to Hyalite Peak, Bozeman, MT (Beers & Berndt, 2010)