Cascades Volcano Observatory, Vancouver, Washington

Mount Shasta, California

Shasta84_mount_shasta_with_shastina_1984.jpg Mount Shasta and Shastina, California. USGS Photograph taken by Lyn Topinka, 1984 [medium size] ... [large size] ... [TIF Format, 24 M]

• Mount Shasta Volcano
  -- Geographic Setting, Geologic and Eruptive History
  Mount Shasta is located in the Cascade Range in northern California about 65 kilometers (40 miles) south of the Oregon-California border and about midway between the Pacific Coast and the Nevada border. One of the largest and highest of the Cascade volcanoes, snowclad Mount Shasta is near the southern end of the range that terminates near Lassen Peak. Mount Shasta is a massive compound stratovolcano composed of overlapping cones centered at four or more main vents; it was constructed during a period of more than 100,000 years. -- Excerpt from:Miller, 1980, USGS Bulletin 1503

• Shastina
  -- Mount Shasta's Satellite Cone
  Two of the main eruptive centers at Mount Shasta, the Shastina and Hotlum cones were constructed during Holocene time, which includes about the last 10,000 years. -- Excerpt from:Miller, 1980, USGS Bulletin 1503

• Black Butte Volcano
  Holocene eruptions also occurred at Black Butte, a group of overlapping dacite domes about 13 kilometers (8 miles) west of Mount Shasta. -- Excerpt from:Miller, 1980, USGS Bulletin 1503

[Map,20K,InlineGIF]
Major West Coast Volcanoes - Washington, Oregon, and California
-- Graphic by: Lyn Topinka, 1998

[Map,12K,InlineGIF]
California-Oregon border area, with Mount Shasta, Medicine Lake, and Lava Beds National Monument
-- Modified from: National Park Service, 1998

[Map,23K,InlineGIF]
Mount Shasta and Vicinity -- Modified from: Miller, 1980, USGS Bulletin 1503

• Shasta-Trinity National Forest -- U.S. Forest Service websites, scroll to desired Forest
• MORE Useful Sites -- CVO Menu, includes links to Volcano Info, Seismicity, Hydrology, etc.

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