Bulletin Volcanologique

, Volume 43, Issue 3, pp 453–471 | Cite as

The geology of split butte — A maar of the south-central snake river plain, Idaho

  • M. B. Womer
  • R. Greely
  • J. S. King
Article
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Revised:

Abstract

Split Butte is a volcanic crater of Quaternary age consisting of a tephra ring which at one time retained a lava lake. The tephra is thinly bedded and is composed of partially palagonitized sideromelane clasts and subordinate lithic fragments. The beds typically dip radially away from the center of the crater, but locally dip toward the crater center.

The tephra ring resulted from phreatomagmatic eruptions as a result of interaction of groundwater with rising basaltic magma, evidenced by glassy and granulated pyroclastic debris, the presence of abundant palagonite and other secondary minerals, numerous armored lapilli, and plastically deformed ash layers below ejecta blocks. Statistical analysis of the grain size distribution of the ash also indicates a phreatomagmatic origin of Split Butte tephra. In addition, the analysis reveals that the stratigraphically lowest tephra was deposited primarily by pyroclastic flow mechanisms while the upper tephra layers, comprising the bulk of the deposits, were deposited dominantly by airfall and pyroclastic surge.

The lava lake and four en echelon basalt dikes were emplaced when phreatomagmatic activity at the vent ceased. Subsequent collapse caused a broad, shallow pit crater to form in the laval lake, and minor spattering occurred at one point along the pit crater scarp.

Partial erosion of the tephra, deposition of aeolian sediments and encroachment of the Butte by later lava flows completed the development of Split Butte.

Keywords

Tephra Pyroclastic Flow Tephra Layer Lava Lake Sand Wave 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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References

  1. Buller, A.T. andMacManus, J., 1973,Distinction among Pyroclastic Deposits from Their Grain-size Frequency Distributions. Jour. Geology,81, p. 97–106.Google Scholar
  2. Crowe, B.M., andFisher, R.V., 1973,Sedimentary Structures in Base Surge deposits with Special Reference to Cross-bedding, Ubehebe Craters, Death Valley, California, Geol. Soc. Amer. Bull., no. 84, p. 663–682.Google Scholar
  3. Davies, D.K., Quearry, M.W., andBonis, S.B., 1978,Glowing Avalanches from the 1974 Eruption of the Volcano Fuego, Guatemala. Geol. Soc. Amer. Bull., no. 89, p. 369–384.Google Scholar
  4. Davis, J.C., 1973,Statistics and Data Analysis in Geology. John Wiley & Sons, New York, 550 pp.Google Scholar
  5. Fisher, R.V., 1964,Maximum Size, Median Diameter, and Sorting of Tephra. Jour. Geophys. Res.,69, p. 341–355.Google Scholar
  6. —————, andWaters, A.C., 1969,Bed Forms in Base-surge Deposits: Lunar Implications. Science,165, p. 1349–1352.CrossRefGoogle Scholar
  7. —————, and —————, 1970,Base Surge Bed Forms in Maar Volcanoes. Amer. Jour. Sci.,268, p. 157–180.CrossRefGoogle Scholar
  8. Greeley, R., andKing, J.S., 1975a, Geologic Field Guide to the Quaternary Volcanics of the South-central Snake River Plain, Idaho. Idaho Bureau of Mines and Geology. Pamphlet 160, 49 p.Google Scholar
  9. —————, and ————— 1975b,Rift Zones in the South-central Snake River Plain, Idaho. Geol. Soc. Amer.,7, no. 5, p. 610–611.Google Scholar
  10. Hamilton, W., andMyers, W.B., 1962,Menan Buttes, Cones of Glassy Basalt Tuff in the Snake River Plain, Idaho. Geol. Surv. Res.,211, p. E114-E118.Google Scholar
  11. Hay, R.L., andIijima, A., 1968a, Petrology of Palagonite Tuffs of Koko Craters, Oahu, Hawaii. Contrib. Min. and Petrol. no 17, p. 141–154.Google Scholar
  12. -----, and -----, 1968b, Nature and Origin of Palagonite Tuffs of the Honolulu Group on Oahu, Hawaii. Geol. Soc. Amer., Memoir 16, p. 331–376.Google Scholar
  13. Heiken, G.H., 1971,Tuff Rings: Examples from the Fort Rock — Christmas Lake Valley Basin, South-central Oregon. Jour. Geophys. Res.,76, 23, p. 5616–5626.Google Scholar
  14. Lirer, L., Pescatore, T., Booth, B., andWalker, G.P.L., 1973,Two Plinian Pumice-fall Deposits from Somma-Vesuvius, Italy. Geol. Soc. Amer. Bull., no 84, p. 759–772.Google Scholar
  15. Lorenz, V., 1970,Some Aspects of the Eruption Mechanism of the Big Hole Maar, Central Oregon. Geol. Soc. Amer. Bull.,81, p. 1823–1830.CrossRefGoogle Scholar
  16. —————, 1971,Collapse Structures in the Permian of the Saar-Nahe Area, Southwest Germany. Geol. Rund.,60, p. 924–948.CrossRefGoogle Scholar
  17. —————, 1973,On the Formation of Maars. Bull. Volcano.,37, p. 183–204.CrossRefGoogle Scholar
  18. -----,McBirney, A.R., andWilliams, H., 1971,An Investigation of Volcanic Depressions, Part III — Maars, Tuff-rings, Tuffcones and Diatremes. NASA Progress Report.Google Scholar
  19. Macdonald, G.A., 1972,Volcanoes. Prentice-Hall Pub. Co., 510 pp.Google Scholar
  20. Moore, J.G., andPeck, D.L.,Accretionary Lapilli in Volcanic Rocks of the Western Continental United States. Jour. of Geol.,70, p. 182–193.Google Scholar
  21. Ollier, C.D., 1967,Maars, Their Characteristics, Varieties and Definition. Bull. Volcanol.,31, p. 45–73.CrossRefGoogle Scholar
  22. —————, 1974,Phreatic Eruptions and Maars. In: Civetta, L., and others, eds.Physical Volcanology, Amsterdam, Elsevier Pub. Co., p. 289–310.Google Scholar
  23. Powers, H.A., 1960,Alkalic Lava Flow with the Fluidity of Basalt in the Snake River Plain. Idaho. No. 136, Geol. Surv. Res. 1960, p. B297.Google Scholar
  24. Reeves, C.C. Jr., andDe Hon, R.A., 1965,Geology of the Potrillo Maar, New Mexico and Northern Chihuahua, Mexico. Am. Jour. of Sci.,263, p. 401–409.CrossRefGoogle Scholar
  25. Rowley, K., 1978,Late Pleistocene Pyroclastic Deposits of Soufriere Volcano, St. Vincent. West Indies. Geol. Soc. Amer. Bull., no. 89, p. 825–835.Google Scholar
  26. Schmincke, H.U., Fisher, R.V., andWaters, A.C., 1973,Antitune and Chute and Pool Structures in the Base Surge Deposits of the Laacher See Area, Germany. Sedimentology, no. 20, p. 553–574.Google Scholar
  27. Sele, S., Sparks, R.S.J., Booth, B., andWalker, G.P.L., 1974,The 1973 Heimaey Strombolian Scoria Deposit, Iceland. Geol. Mag.,111, no. 6, p. 539–548.CrossRefGoogle Scholar
  28. Sheridan, M.F., 1971,Particle Size Characteristics of Pyroclastic Tuffs. Jour. Geophys. Res.,76, p. 5627–5634.Google Scholar
  29. -----, andUpdike, R.G., 1975,Sugarloaf Mountain Tephra — a Pleistocene Rhyolitic Deposit of Base-surge Origin in Northern Arizona, Geol. Soc. Amer. Bull., no. 86, p. 571–581.Google Scholar
  30. Sigvaldason, G.E,, 1968,Structure and Products of Subaquatic Volcanoes in Iceland Contrib. Min. and Petrol., no. 18, p. 1–18.Google Scholar
  31. Sparks, R.S.J., 1975,Stratigraphy and geology of the Ignimbrite of Vulsini Volcano, Central Italy. Geol. Rundsch., no. 64, p. 497–523.Google Scholar
  32. -----, 1976,Grain Size Variation in Ignimbrites and Implications for the Transport of Pyroclastic Flows. Sedimentology, no. 23, p. 147–188.Google Scholar
  33. -----,Self, S., andWalker, G.P.L., 1973,Products of Ignimbrite Eruptions. Geology, no. 1., p. 115–118.Google Scholar
  34. -----, andWalker, G.P.L., 1973,The Ground Surge Deposit: A Third Type of Pyroclastic Rock. Nature Phys. Sci., no. 241, p. 62–64.Google Scholar
  35. Stearn, H.T., 1925,The Explosive Phase of Kilauea Volcano, Hawaii, in 1924. Bull. Volcanol.,5–6, p. 193–208.Google Scholar
  36. -----,Crandall, L., andSteward, W.G., 1938,Geology and Groundwater Resources of the Snake River Plain in Southern Idaho. U.S. Geol. Surv. Water Supply Paper no. 774, 268 p.Google Scholar
  37. Stone, G.T., 1967,Petrology of the Upper Cenozoic Basalts of the Western Snake River Plain, Idaho. Doctoral Thesis, Univ. of Colo., Boulder, Colo., 392 p.Google Scholar
  38. Thorarinsson, S., 1967,Surtsey — The New Island in the North Atlantic. Viking Press, New York, 47 pp.Google Scholar
  39. Walker, G.P.L., 1971,Grain Size Characteristics of Pyroclastic Deposits. Jour. Geology,79, p. 696–714.CrossRefGoogle Scholar
  40. —————, andCroasdale, R., 1971,Characteristics of Some Basaltic Pyroclastics. Bull. Volcanol.,35, p. 303–317.CrossRefGoogle Scholar
  41. Water, A.C., andFisher, R.V., 1970,Maar Volcanoes. Second Colomb. River Basalt Sympos., p. 157–170.Google Scholar
  42. —————, and —————, 1971,Base Surges and Their Deposits: Capelinhos and Taal Volcanoes. Jour. Geophys. Res.,76, p. 5596–5614.CrossRefGoogle Scholar
  43. Williams, H., Turner, F.J., andGilbert, C.M., 1954.Petrography — an Introduction to the Study of Rocks in Thin Sections. San Francisco, W.H. Freeman Pub. Co., p. 28.Google Scholar
  44. Wohletz, K.H., 1979a. Evolution of Tuff Cones and Tuff Rings (abstract). Geol. Soc. Amer. Abstracts and Programs, no. 11, no. 7, p. 543.Google Scholar
  45. -----, 1979b, Experimental Modelling of Hydromagmatic Volcanism (abstract). AGU Volcanism Symposium, Bend, Oregon.Google Scholar
  46. -----, andSheridan, M.F., 1979,A Model of Pyroclastic Surge. Geol. Soc. Amer., Spec. Paper 180, p. 177–194.Google Scholar
  47. Womer, M.B., 1977a. A Study of Ash Rings of Split Butte, a Maar Crater of the South-Central Snake River Plain, Idaho. Masters Thesis, State Univ. New York at Buffalo, 53 pp.Google Scholar
  48. -----, 1977b, The Origin of Split Butte, a Maar-type Crater of the South Central Snake River Plain, Idaho. NASA CR-154621, p. 189–202.Google Scholar
  49. Zohdy, A.A.R., andStanley, W.D., 1973,Preliminary Interpretation of Electrical Sounding Curves Obtained Across the Snake River Plain from Blackfoot to Arco, Idaho. U.S. Geol. Surv., Open File Report, 3 pp.Google Scholar

Copyright information

© Intern. Association of Volcanology and Chemistry of the Earth’s Interior 1980

Authors and Affiliations

  • M. B. Womer
    • 1
  • R. Greely
    • 2
    • 3
  • J. S. King
    • 4
  1. 1.Department of GeologyState University of N.Y. at BuffaloAmherst
  2. 2.Department of Geology and Center for Meteorite StudiesArizona State UniversityTempe
  3. 3.Space Sciences DivisionNational Aeronautics and Space AdministrationMoffet Field
  4. 4.Department of Geology State University of N.Y. at BuffaloAmherst

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