Diamond Craters

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  • Country
  • Subregion Name
  • Primary Volcano Type
  • Last Known Eruption
  • 43.1°N
  • 118.75°W

  • 1435 m
    4707 ft

  • 322170
  • Latitude
  • Longitude

  • Summit

  • Volcano

There are no activity reports for Diamond Craters.

 Available Weekly Reports

There are no Weekly Reports available for Diamond Craters.

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

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
5610 BCE ± 470 years Unknown Confirmed 4 Radiocarbon (corrected)

The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.

Benedict E, 2000. Diamond Craters, Oregon's geologic gem. U S Bur Land Management brochure BLM/OR/WA/GI-00/027-1122.32.

Chitwood L A, 1994. Inflated basaltic lava--examples of processes and landforms from central and southeast Oregon. Oregon Geol, 56: 11-21.

Friedman I, Peterson N, 1971. Obsidian hydration dating applied to dating of basaltic volcanic activity. Science, 172: 1028.

Green J, Short N M, 1971. Volcanic Landforms and Surface Features: a Photographic Atlas and Glossary. New York: Springer-Verlag, 519 p.

Russell J K, Nicholls J, 1987. Early crystallization history of alkali olivine basalts, Diamond Craters, Oregon. Geochim Cosmochim Acta, 51: 143-154.

Sarna-Wojcicki A M, Champion D E, Davis J O, 1983. Holocene volcanism in the conterminous United States and the role of silicic volcanic ash layers in correlation of latest Pleistocene and Holocene deposits. In: Wright H E (ed) {Late-Quaternary Environments of the United States}, Minneapolis: Univ Minnesota Press, 2: 52-77.

Sherrod D R, Champion D E, McGeehin J P, 2012. Age and duration of volcanic activity at Diamond Craters, southeastern Oregon. J Volc Geotherm Res, 247-248: 108-114.

Smith R L, Shaw H R, 1975. Igneous-related geothermal systems. U S Geol Surv Circ, 726: 58-83.

Smith R L, Shaw H R, Luedke R G, Russell S L, 1978. Comprehensive tables giving physical data and thermal energy estimates for young igneous systems of the United States. U S Geol Surv Open-File Rpt, 78-925: 1-25.

Smith W D, 1927. Contribution to the geology of southeastern Oregon (Steens and Pueblo Mountains). J Geol, 35: 421-440.

Wood C A, Kienle J (eds), 1990. Volcanoes of North America. Cambridge, England: Cambridge Univ Press, 354 p.

Diamond Craters volcanic field consists of a 60 sq km area of basaltic lava flows and numerous cinder cones and maars located between the SE Oregon town of Burns and Steens Mountain. A basaltic pahoehoe lava field is overlain by deposits from phreatomagmatic and strombolian eruptions that formed a late-stage central vent complex of about 20 craters and cones that densely fill a 1.1 x 1.6 km box-shaped caldera. The age of Diamond Craters is constrained to within 7320-7790 calibrated years Before Present by radiocarbon-dated floodplain deposits below the lava flows and paloemagnetic evidence (Sherrod et al., 2012). Structural doming at Diamond Craters has created a series of six overlapping topographic highs. The highest of these is known as Graben Dome; its 1435-m-high summit is cut by a NW-SE-trending graben 0.4 x 2.1 km long and 30 m deep. Lava flows on the eastern side of the volcanic field and scattered cinder cones and maars formed during the last stage of activity.