Photo of this volcano
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 39.661°N
  • 107.035°W

  • 2230 m
    7314 ft

  • 328010
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for Dotsero.

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

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

The Global Volcanism Program has no synonyms or subfeatures listed for Dotsero.

Eruptive History

Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
2200 BCE ± 300 years Unknown Confirmed 2 Radiocarbon (uncorrected)

Deformation History

Information about Deformation periods will be available soon.

Emission History

There is no Emissions History data is available for Dotsero.

Photo Gallery

During the mid-Holocene a maar was formed in central Colorado near the junction of the Colorado and Eagle Rivers west of the Gore Range. The quarry in the foreground is cut into basaltic tephra deposits on the rim of the maar. The 700 m wide maar is 400 m deep and cuts a ridge of evaporites and reddish oxidized sandstones of Pennsylvanian age, which can be seen on the far crater wall. The maar was erupted about 4150 radiocarbon years ago and is the youngest volcanic feature of Colorado. The Eagle River lies to the south in the valley beyond the crater.

Photo by Lee Siebert, 1999 (Smithsonian Institution).
See title for photo information.

Smithsonian Sample Collections Database

The following 1 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 117125 Basalt -- 1 Jul 1999

Affiliated Sites