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Bachelor

Photo of this volcano
  • Country
  • Primary Volcano Type
  • Last Known Eruption
  •  
  • 43.979°N
  • 121.688°W

  • 2763 m
    9065 ft

  • 322090
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Bachelor.

The Global Volcanism Program has no Weekly Reports available for Bachelor.

The Global Volcanism Program has no Bulletin Reports available for Bachelor.

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.

Eruptive History

There is data available for 1 confirmed Holocene eruptive periods.

5800 BCE ± 750 years Confirmed Eruption  

Episode 1 | Eruption Episode North flank (Egan cone)
5800 BCE ± 750 years - Unknown Evidence from Correlation: Magnetism

List of 4 Events for Episode 1 at North flank (Egan cone)

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion
   - - - -    - - - - Lava flow
   - - - -    - - - - Cinder Cone
   - - - -    - - - - Tephra
Deformation History

There is no Deformation History data available for Bachelor.

Emission History

There is no Emissions History data available for Bachelor.

Photo Gallery

Mount Bachelor, SW of Bend, Oregon, is seen here from the north with a neoglacial moraine in the center. No known summit eruptions have occurred during the Holocene, although it was active until the latest Pleistocene and a N-flank vent produced a series of lava flows immediately preceding the eruption of the Mazama ash about 7,700 years ago.

Photo by Willie Scott, 1981 (U.S. Geological Survey).
Kwohl Butte scoria cone in the foreground is part of a 25-km-long chain of small shield volcanoes and scoria cones extending north to Mount Bachelor. South and Middle Sister volcanoes are visible to the left behind the eroded slopes of Bachelor.

Photo by Lee Siebert, 1981 (Smithsonian Institution).
Kwohl Butte is one in a 25-km-long chain of scoria cones and small shield volcanoes south of Mount Bachelor in the central Cascade Range of Oregon. Despite the youthful appearance of the cone, geologic mapping indicates construction of the chain was completed about 12,000 years ago.

Photo by Lee Siebert, 1981 (Smithsonian Institution).
Mount Bachelor, seen here from the summit of Broken Top volcano to the north, was constructed during the late Pleistocene. Holocene eruptions occurred at a cone on the north flank.

Photo by Lee Siebert, 1982 (Smithsonian Institution).
Mount Bachelor is seen here beyond Sparks Lake to the west. It is a late Pleistocene-to-Holocene stratovolcano at the northern end of a 25-km-long chain of scoria cones and small shield volcanoes.

Photo by Lee Siebert, 1982 (Smithsonian Institution).
GVP Map Holdings

The maps shown below have been scanned from the GVP map archives and include the volcano on this page. Clicking on the small images will load the full 300 dpi map. Very small-scale maps (such as world maps) are not included. The maps database originated over 30 years ago, but was only recently updated and connected to our main database. We welcome users to tell us if they see incorrect information or other problems with the maps; please use the Contact GVP link at the bottom of the page to send us email.


Title: Canada, United States
Publisher: DMA Aerospace Center
Country: United States
Year: 1988
Series: ONC
Map Type: Topographic
Scale: 1:1,000,000
Map of Canada, United States

Title: W US /Map of Dist, Comp, Age-Late CZ Volc Centers
Publisher: US Geological Survey
Country: United States
Year: 1984
Series: MI
Map Type: Geology (Volcano)
Scale: 1:2,500,000
Map of W US /Map of Dist, Comp, Age-Late CZ Volc Centers

Title: Dist, Thickness, Mass of Tephra from Volcanoes
Publisher: US Geological Survey
Country: United States
Year: 1983
Series: MFS
Map Type: Geology (Volcanic Hazard)
Scale: 1:2,500,000
Map of Dist, Thickness, Mass of Tephra from Volcanoes

Title: Distribution, Comp, & Age of L Cen Volcan, Cascade Range, NW US
Publisher: US Geological Survey
Country: United States
Year: 1983
Series: MI
Map Type: Geology
Scale: 1:500,000
Map of Distribution, Comp, & Age of L Cen Volcan, Cascade Range, NW US

Title: Map SHowing Distribution, Composition, and Age of Late Cenozoic Volcanic Centers in Oregon and Washington
Publisher: US Geological Survey
Country: United States
Year: 1982
Series: Misc Investigations
Map Type: Geology
Scale: 1:1,000,000
Map of Map SHowing Distribution, Composition, and Age of Late Cenozoic Volcanic Centers in Oregon and Washington

Title: Geothermal Energy Resources of the Western United States
Publisher: ERDA and USGS
Country: United States
Year: 1977
Map Type: Cultural (Geothermal Resources)
Scale: 1:1,250,000
Map of Geothermal Energy Resources of the Western United States

Title: Crescent
Publisher: US Geological Survey
Country: United States
Year: 1970
Series: V502
Map Type: Topographic
Scale: 1:250,000
Map of Crescent

Title: Klamath Falls
Publisher: US Geological Survey
Country: United States
Year: 1970
Series: V502
Map Type: Topographic
Scale: 1:250,000
Map of Klamath Falls

Title: Geol Map of OR W of 121st Meridian
Publisher: US Geological Survey
Country: United States
Year: 1961
Series: MI
Map Type: Geology
Scale: 1:500,000
Map of Geol Map of OR W of 121st Meridian
Smithsonian Sample Collections Database

The following 3 samples associated with this volcano can be found in the Smithsonian's NMNH Department of Mineral Sciences collections, and may be availble for research (contact the Rock and Ore Collections Manager). Catalog number links will open a window with more information.

Catalog Number Sample Description Lava Source Collection Date
NMNH 112584-1 Basalt -- --
NMNH 112584-2 Basalt -- --
NMNH 112584-3 Pumice -- --
External Sites