Faculty and Staff

John Longshore

Petrology, Volcanology

  • Ph.D., Geology, Rice University, 1966
  • M. A., Geology, Rice Institute, 1959
  • B. A., Geology, Emory University, 1957
Professional Experience:
Personal and Research Interests:

Geochemistry and petrology of Tertiary volcanic rocks west in the Modoc Plateau west of Alturas, California. Geochemistry and petrology of arc volcanic rocks, particularly northeastern California, southern Oregon, and Guam. Volcanic-hosted ore deposits. 

Theses Supervised


Collins, Nancy, 1999, Stratigraphy and Geochemistry of the Alturas Formation, Northeastern California (M.S.)

Lee, Dennis, 1997, Petrogenesis of Metabasalt Greenstone Blocks of the Franciscan Terrane, Humboldt County, California (B.S.)

Aubin, Wade, 1997, Late Plesitocene Glacial Sequence, Petrology and Geochemistry of Ship Mountain, Siskiyou Mountains, Western Klamath Mountains, Northwestern California (B.S.)

Batten, Clifford, 1996, Granulometric Analysis and Explosive Model of Blue Lake Maar, High Cascades, Oregon (B.S.)

Gere, Tim, 1996, Volcanic and Glacial Stratigraphy of Cache Mountain, Deschutes County, Oregon (B.S.)

Balzer, Vaughn, 1996, The Quaternary and Glacial Stratigraphy of the East Side of McKenzie Pass, Oregon (B.S.)

Bacon, Steve, 1996, Quaternary Volcanic and Glacial Stratigraphy of Black Crater, Outside Sisters, Oregon (B.S.)

Oldenberg, Edward, 1995, Chemical and Petrologic Comparison of Cretaceous Plutonic Rocks from the Diamond Mountains, Fort Sage Mountains, and Yuba Pass Region of Northeastern California (M.S.)

Rasmussen, Brian, 1995, A Multispectral Interpretation of the Geology of Stone Coal Mountain, Modoc County, Northeastern California (B.S.)

Evans, Jeff, , Quaternary Volcanic and Glacial Stratigraphy of the Black Butte Area, Deschutes County, Oregon (B.S.)

Potter, Sandra, 1988, Geology of the Northern Portion of the Likely Fault Lineament, Modoc County, Northeastern California (M.S.)

Tillinghast, Stephen, , Quaternary Stratigraphy of Lower Cache Creek Valley, Deschutes County, Oregon (B.S.)

Shackelton, Katherine, 1995, Origin of Orbicular Granodiorite at Moose Lake, Sequoia National Park, Tulare County, California (B.S.)

John Longshore