Spelling suggestions: "subject:"volcanic ash, turf, etc."" "subject:"volcanic ash, cuff, etc.""
21 |
Clay mineral characterization of young cinder cone soilsAndrew, Allen David, 1945- January 1970 (has links)
No description available.
|
22 |
Volcanic cinder asphaltic concreteMassucco, Joseph, 1944- January 1968 (has links)
No description available.
|
23 |
Petrography and chemistry of the Key Tuffite at Bell Allard, Matagami, QuébecDavidson, Alex J. January 1977 (has links)
No description available.
|
24 |
Chemistry of the major minerals from the tephra, lava, volcanic breccia and tuff from Glacier Peak volcano, North Cascades, Washington StateCalderone, Gina Marie January 1986 (has links)
The purpose of this study was to provide both a detailed geochemical analysis of the lithologies that comprise the Glacier Peak volcanic terrain and to summarize the small amounts of past research which has been completed on this Cascade volcano. A broad and extensive literature search indicates this area was previously unstudied in modern petrochemical terms. This study is a detailed petrochemical description and analysis of the mineral phases and the textures present in the various units in the Glacier Peak area (tephra, lava, breccia, and tuff). A scanning electron microprobe study of the scoriaceous basaltic lapilli of the White Chuck cinder cone, indicates that the contemporaneous basaltic cone is comprised of two or more compositional groups. One group is higher in calcium and iron than the other group. These distinct groups, in the lapilli tephra, may imply that the recent cone was built by a multitude of eruptions which variedslightly in composition over time.Through microprobe techniques and computer point-counting methods, the petrochemistry of the Glacier Peak and Gamma Ridge lava flows and the modal distributions of minerals present were determined. The micropobe data was checked for stochiometry and plotted on triangular variation diagrams. Histograms show the distribution along plagioclase binary, solid-solution series (NaAlS13O8 - CaA1Si208). Standard triangular variation diagrams were used to show the composition of the pyroxenes present in the samples (othopyroxene or clinopyroxene). A bimodal distribution of both the pyroxene and the plagioclase exists.The data and observations made in this thesis study, (1) support the sequence of the Glacier Peak magmatic events (i.e., the late Miocene to Pliocene Gamma Ridge hypersthene-augite dacite flows, the Pleistocene Glacier Peak hypersthene dacite flows, and the recent, basaltic, White Chuck cinder cone tephra eruptions), and (2) suggests changing magmatic conditions which would result in the observed disequilibrium features common throughout the Glacier Peak volcanic series (i.e., resorbed and relict crystals, normal and reverse zoning features, cognate clotting and polymodal distribution of plagioclase compositions).Finally, from these observations made on the sequence of the magmatic events of the Glacier Peak series and the conclusions from the analyzed compositions of these volcanic rocks, which suggest changing magmatic conditions, a generalized magmatic model (introduced by Eichelberger, 1977) has been applied to the Glacier Peak series. This model involves injection of basaltic magma into a more silicic magma chamber and results in a hybridized magma. This would be the Glacier Peak magma and would result in the petrological characteristics which imply disequilibrium conditions.
|
25 |
Stable isotopes of authigenic minerals in variably-saturated fractured tuffWeber, Daniel Scott, January 1986 (has links) (PDF)
Thesis (M.S. - Hydrology and Water Resources)--University of Arizona, 1986. / Includes bibliographical references (leaves 122-128).
|
26 |
Rapid estimate of solid volume in large tuff cores using a gas pycnometerGeddis, A. M. January 1996 (has links) (PDF)
Thesis (M.S. - Hydrology and Water Resources)--University of Arizona. / Includes bibliographical references (leaves 115-118).
|
27 |
Aperture configuration of a natural fracture in welded tuffVickers, Brian Charles, January 1990 (has links) (PDF)
Thesis (M.S. - Hydrology and Water Resources)--University of Arizona. / Includes bibliographical references (leaves 129-132).
|
28 |
Dynamic and cyclic properties in shear of tuff specimens from Yucca Mountain, NevadaJeon, Seong Yeol, January 1900 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2008. / Vita. Includes bibliographical references.
|
29 |
Spatial and temporal distribution of a rhyolite compositional continuum from wet-oxidizing to dry-reducing types governed by lower-middle crustal P-T-fO₂-fH₂O conditions in the Taupo Volcanic Zone, New Zealand : a thesis submitted in fulfilment of the requirements for the degree of Doctor of Philosophy in Geology at the University of Canterbury /Deering, Chad D. January 2009 (has links)
Thesis (Ph. D.)--University of Canterbury, 2009. / Typescript (photocopy). Includes bibliographical references. Also available via the World Wide Web.
|
30 |
Volcanology and petrology of the Rattlesnake Ash-Flow Tuff, eastern Oregon /Streck, Martin J. January 1994 (has links)
Thesis (Ph. D.)--Oregon State University, 1995. / System requirements for computer disk: Macintosh. Typescript (photocopy) Includes bibliographical references (leaves 181-184). Also available online.
|
Page generated in 0.0691 seconds