Jordan Craters is a monogenetic volcanic field in
southeast Oregon. Three main vents are aligned parallel to structures
caused by Basin and Range faulting. Coffeepot Crater, shown above, was
one of the main vents. Flows from this vent covered 29 square miles (75
square kilometers). Photo courtesy of the Oregon Department of Geology
and Mineral Industries. Special thanks to Rosemary Kenney.
Aerial view near Coffeepot Crater showing cone, pit craters, and pahoehoe
lava. Lava near the vent is shelly pahoehoe. The cone is made of
lapilli and bombs. A lava pond
once filled the crater and broke through and rafted away part of the
cone. This volcanic field contains excellent examples of features
associated with basaltic volcanism. Photo courtesy of the Oregon
Department of Geology and Mineral Industries.
Sources of Information:
Hart, W.K., and Mertzmann, S.A., 1983, Late Cenozoic volcanic stratigraphy of the Jordan Valley area, southeastern Oregon: Oregon Geology, v. 45, p. 15-19.
Otto, B.R., and Hutchinson, 1977, The geology of the Jordan Craters, Malhuer County, Oregon: Ore Bin (Oregon Geology), v. 39, p. 125-140.
Simkin, T., and Siebert, L., 1994, Volcanoes of the World: Geoscience Press, Tucson, Arizona, 349 p.
Wood, C.A., and Kienle, J., 1993, Volcanoes of North America: Cambridge University Press, New York, 354 p.
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