Hostname: page-component-8448b6f56d-sxzjt Total loading time: 0 Render date: 2024-04-24T12:16:50.169Z Has data issue: false hasContentIssue false
  • English
  • Français

The Age of Glacier Peak Tephra in West-Central Montana

Published online by Cambridge University Press:  20 January 2017

Peter J. Mehringer Jr. ,
John C. Sheppard  and
Franklin F. Foit Jr.
Peter J. Mehringer Jr.
Affiliation:
Department of Anthropology and Geology, Washington State University, Pullman, Washington 99164
John C. Sheppard
Affiliation:
Department of Chemical Engineering and Anthropology, Washington State University, Pullman, Washington 99164
Franklin F. Foit Jr.
Affiliation:
Department of Geology, Washington State University, Pullman, Washington 99164
Get access Rights & Permissions [Opens in a new window]

Abstract

At Sheep Mountain Bog, near Missoula, Montana, a late-glacial tephra, that probably fell in late summer, is preserved as an 8-mm-thick graded bed overlain by another 8 mm of redeposited ash mixed with lake deposits. Sediment surrounding the ash was 14C dated to about 11,200 yr B.P. Electron-microprobe analyses of the volcanic glass and hornblende phenocrysts from this ash layer indicate that they are similar in major-element chemistry to those of Glacier Peak layer G previously considered to be about 12,000 yr old or older.

Type
Research Article
Information
Quaternary Research , Volume 21 , Issue 1 , January 1984 , pp. 36 - 41
Copyright
University of Washington

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Blinman, E., Mehringer, P.J. Jr., Sheppard, J.C. (1979). Pollen influx and the deposition of Mazama and Glacier Peak tephra Sheets, P.D., Grayson, D.K., Volcanic Activity and Human Ecology Academic Press New York 393–425 Google Scholar
Borchardt, G.A., Aruscavage, P.J., Millard, H.T. Jr., (1972). Correlation of the Bishop ash, a Pleistocene marker bed, using instrumental neutron activation analysis Journal of Sedimentary Petrology 42, 301–306 Google Scholar
Chatters, R.M. (1968). Washington State University natural radiocarbon measurements, I Radiocarbon 10, 479–498 CrossRefGoogle Scholar
Fryxell, R. (1965). Mazama and Glacier Peak volcanic ash layers: Relative ages Science 147, 1288–1290 Google Scholar
Lemke, R.W., Mudge, M.R., Wilcox, R.E., Powers, H.A. (1975). Geologic setting of the Glacier Peak and Mazama ash-bed markers in west-central Montana U.S. Geological Survey Bulletin 1395-H, Google Scholar
Mack, R.N., Rutter, N.W., Valastro, S. (1983). Holocene vegetational history of the Kootenai River Valley, Montana Quaternary Research 20, 177–193 CrossRefGoogle Scholar
Mehringer, P.J. Jr., Arno, S.E., Petersen, K.L. (1977a). Postglacial history of Lost Trail Pass Bog, Bitterroot Mountains, Montana Arctic and Alpine Research 9, 345–368 CrossRefGoogle Scholar
Mehringer, P.J. Jr., Blinman, E., Petersen, K.L. (1977b). Pollen influx and volcanic ash Science 198, 257–261 CrossRefGoogle ScholarPubMed
Porter, S.C. (1978). Glacier Peak tephra in the North Cascade Range, Washington: Stratigraphy, distribution, and relationship to late-glacial events Quaternary Research 10, 30–41 Google Scholar
Sarna-Wojcicki, A.M., Waitt, R.B. Jr., Woodward, M.J., Shipley, S., Rivera, J. (1981). Premagmatic ash erupted from March 27 through May 14, 1980—Extent, mass, volume, and composition Lipman, P.W., Mullineaux, D.R., The 1980 Eruptions of Mount St. Helens, Washington. U.S. Geological Survey Professional Paper 1250. 569–575 Google Scholar
Smith, H.W., Okazaki, R., Knowles, C.R. (1977). Electron microprobe data for tephra attributed to Glacier Peak, Washington Quaternary Research 7, 197–206 CrossRefGoogle Scholar
Waitt, R.B. Jr., Yount, J.C., Davis, P.T. (1982). Regional significance of an early Holocene moraine in Enchantment Lakes Basin, North Cascade Range, Washington Quaternary Research 17, 191–210 Google Scholar
Westgate, J.A., Evans, M.E. (1978). Compositional variability of Glacier Peak tephra and its stratigraphic significance Canadian Journal of Earth Sciences 15, 1554–1567 CrossRefGoogle Scholar
Westgate, J.A., Gorton, M.P. (1980). Correlation techniques in tephra studies Self, S., Sparks, R.S.J., Tephra Studies D. Reidel Publ Boston 73–94 Google Scholar
Westgate, J.A., Smith, D.G.W., Tomlinson, M. (1970). Late Quaternary tephra layers in south-western Canada Smith, R.A., Smith, J.W., Early Man and Environments in Northwest North America Students Press, University of Calgary 13–34 Google Scholar