DOCSLIB.ORG

The Use of Mt. Mazama Volcanic Ash As Natural Pozzolans for Sustainable Soil and Unpaved Road Improvement

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
The Use of Mt. Mazama Volcanic Ash As Natural Pozzolans for Sustainable Soil and Unpaved Road Improvement Portland State University PDXScholar Transportation Research and Education Center TREC Final Reports (TREC) 6-2018 The Use of Mt. Mazama Volcanic Ash as Natural Pozzolans for Sustainable Soil and Unpaved Road Improvement Matthew D. Sleep Oregon Institute of Technology Morgan B. Masley Oregon Institute of Technology Follow this and additional works at: https://pdxscholar.library.pdx.edu/trec_reports Part of the Transportation Commons, and the Urban Studies Commons Let us know how access to this document benefits ou.y Recommended Citation Sleep, Matthew and Masley, Morgan. The use of Mt. Mazama volcanic ash as natural pozzolans for sustainable soil and unpaved road improvement. NITC-RR-1075. Portland, OR: Transportation Research and Education Center (TREC), 2018. https://www.doi.org/10.15760/trec.202 This Report is brought to you for free and open access. It has been accepted for inclusion in TREC Final Reports by an authorized administrator of PDXScholar. Please contact us if we can make this document more accessible: [email protected]. FINAL REPORT The Use of Mt. Mazama Volcanic Ash as Natural Pozzolans for Sustainable Soil and Unpaved Road Improvement NITC-RR-1075 June 2018 NITC is a U.S. Department of Transportation national university transportation center. THE USE OF MT. MAZAMA VOLCANIC ASH AS NATURAL POZZOLANS FOR SUSTAINABLE SOIL AND UNPAVED ROAD IMPROVEMENT Final Report NITC-RR-1075 by Dr. Matthew D. Sleep Morgan B. Masley Oregon Institute of Technology for National Institute for Transportation and Communities (NITC) P.O. Box 751 Portland, OR 97207 June 2018 ii Technical Report Documentation Page 1. Report No. 2. Government Accession No. 3. Recipient’s Catalog No. NITC-RR-1075 4. Title and Subtitle 5. Report Date The Use of Mt. Mazama Volcanic Ash as Natural Pozzolans for Sustainable Soil and Unpaved June 2018 Road Improvement 6. Performing Organization Code 7. Author(s) 8. Performing Organization Report No. Dr. Matthew Sleep Morgan Masley 9. Performing Organization Name and Address 10. Work Unit No. (TRAIS) Oregon Institute of Technology 3201 Campus Drive 11. Contract or Grant No. Klamath Falls, OR 97601 12. Sponsoring Agency Name and Address 13. Type of Report and Period Covered National Institute for Transportation and Communities (NITC) 14. Sponsoring Agency Code P.O. Box 751 Portland, OR 97207 15. Supplementary Notes 16. Abstract This report investigates the viability of using volcanic ash deposited from the eruption of Mt. Mazama as a natural pozzolan and substitute for the more conventional methods of soil stabilization and unpaved roadway improvement, including dust abatement. Chemical analyses show that Mt. Mazama volcanic ash has similar chemistry to that found in many pozzolanic materials. Standard and modified ASTM strength activity index (SAI) testing was performed on a variety of mixtures containing volcanic ash, hydrated lime, crushed volcanic ash and portland cement at different percentages. A gravel wash sieve test and a slurry mix test were devised in order to determine how the ash could be used to both penetrate into compacted gravel layers and bind material together for the prevention of dust mitigation as defined by the EPA. These new procedures indicate that Mt. Mazama ash can be effective as a supplement to portland cement for binding compacted gravel layers and reducing the dust particulate percentage. Mt. Mazama ash, mixed with highly compressible and organic soil, does not increase unconfined compressive strength. Sustainability studies show that any replacement of portland cement with volcanic ash reduces carbon dioxide emissions and embodied energy. 17. Key Words 18. Distribution Statement No restrictions. Copies available from NITC: www.nitc-utc.net 19. Security Classification (of this report) 20. Security Classification (of this page) 21. No. of Pages 22. Price Unclassified Unclassified 76 iii ACKNOWLEDGEMENTS Matthew Sleep would like to acknowledge support from the National Institute for Transportation and Communities (NITC) under grant number (1075). DISCLAIMER The contents of this report reflect the views of the authors, who are solely responsible for the facts and the accuracy of the material and information presented herein. This document is disseminated under the sponsorship of the U.S. Department of Transportation University Transportation Centers Program in the interest of information exchange. The U.S. Government assumes no liability for the contents or use thereof. The contents do not necessarily reflect the official views of the U.S. Government This report does not constitute a standard, specification, or regulation. RECOMMENDED CITATION Sleep, Matthew and Masley, Morgan. The use of Mt. Mazama volcanic ash as natural pozzolans for sustainable soil and unpaved road improvement. NITC-RR-1075. Portland, OR: Transportation Research and Education Center (TREC), 2018. iv TABLE OF CONTENTS EXECUTIVE SUMMARY .......................................................................................................... 9 1.0 INTRODUCTION........................................................................................................... 10 2.0 THE PROBLEM ............................................................................................................. 10 3.0 METHODOLOGY ......................................................................................................... 11 4.0 VOLCANIC MATERIAL STUDY AND COLLECTION ......................................... 12 5.0 LITERATURE REVIEW .............................................................................................. 15 5.1 POZZOLANS ................................................................................................................... 15 5.1.1 Pozzolan Classification ............................................................................................. 16 5.1.2 Chemical Composition.............................................................................................. 16 5.1.3 Use in Concrete ......................................................................................................... 17 5.1.3.1 Water demand ....................................................................................................... 17 5.1.3.2 Setting time............................................................................................................ 17 5.1.3.3 Heat of hydration .................................................................................................. 18 5.1.3.4 Strength ................................................................................................................. 18 5.1.3.5 Durability .............................................................................................................. 19 5.2 UNPAVED ROAD DUST MITIGATION ....................................................................... 20 5.3 TRAIL IMPROVEMENT METHODS ............................................................................ 21 5.4 SOIL IMPROVEMENT ................................................................................................... 21 5.5 VOLCANIC ASH TESTING ........................................................................................... 22 6.0 METHODOLOGY AND RESULTS............................................................................. 23 6.1 CLASSIFICATION OF MT. MAZAMA VOLCANIC ASH AS A NATURAL POZZOLAN ..................................................................................................................... 23 6.1.1 Moisture Percentage.................................................................................................. 23 6.1.2 Loss on Ignition ........................................................................................................ 24 6.1.3 Fineness..................................................................................................................... 25 6.1.4 Chemical Analysis .................................................................................................... 25 6.1.5 Dynamic Chemical Analysis..................................................................................... 26 6.2 MODIFIED SAI TESTING .............................................................................................. 30 6.3 UNPAVED ROAD IMPROVEMENT ............................................................................. 37 6.3.1 Cylinder Slurry Mix Testing ..................................................................................... 37 6.3.2 Dust/Gravel Wash Sieve Test ................................................................................... 42 6.4 ORGANIC SOIL IMPROVEMENT ................................................................................ 45 6.5 SUSTAINABILITY ANALYSIS OF MT. MAZAMA VOLCANIC ASH ..................... 53 7.0 CONCLUSIONS AND RECOMMENDATIONS ........................................................ 58 8.0 RECOMMENDATIONS FOR FUTURE WORK ....................................................... 59 9.0 REFERENCES ................................................................................................................ 60 10.0 APPENDIX ...................................................................................................................... 63 10.1 SAI TESTING TRIAL 1 ................................................................................................... 63 10.2 SAI TESTING TRIAL 2 ................................................................................................... 65 10.3 SAI
Load more

Recommended publications
  • Washington Division of Geology and Earth Resources Open File Report 74-1
    TEPHRA OF SALMON SPRINGS AGE FROM THE SOUTHEASTERN OLYMPIC PENINSULA, WASHINGTON by R. U. BIRDSEYE and R. J. CARSON North Carolina State University WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES OPEN FILE REPORT 74-1 1974 This report has not been edited or reviewed for conformity with Division of Geology and Earth Resources standards and nomenclature Revised October, 1989 CONTENTS Page Abstract •.•................••......••........•.......•............• 1 Introduction ....................................................... 1 Acknowledgments •••••••••••••••••••••••••••••••••••••••••••••••••••• 1 Pleistocene climate, glaciation, and volcanism ••••••••••••••••••••• 2 The ashes: Their thickness, distribution, and stratigraphic position •••••••••••••••••••••••••••••••••••••••••• 7 Color and texture of the ash ••••••••••••••••••••••••••••••••••••••• 14 Deposition of the ash •••••••••••••••••••••••••••••••••••••••••••••• 14 Atmospheric conditions during deposition of the ash •••••••••••••••• 20 Usefulness of volcanic ash in stratigraphic determination •••••••••• 21 Canel us ion ....•••.•..••••.••..••......•.••••••.••••....•••••...••.. 21 References cited ••••••••••••••••••••••••••••••••••••••••••••••••••• 23 ILLUSTRATIONS Figure 1 - Maximum extent of the Cordilleran ice sheet •••••••••••• 3 Figure 2 - Summary of late Pleistocene events in western Washington ••••••••••••••••••••••••••••••••••••• 4 Figure 3 - Location map showing inferred extent of minimum areas of fallout of volcanic ash from eruptions of Mount Mazama and Glacier Peak •••••••••••••••••••••••
    [Show full text]
  • Geology of the Northern Part of the Southeast Three Sisters
    AN ABSTRACT OF THE THESIS OF Karl C. Wozniak for the degree of Master of Science the Department cf Geology presented on February 8, 1982 Title: Geology of the Northern Part of the Southeast Three Sisters Quadrangle, Oregon Redacted for Privacy Abstract approved: E. M. Taylorc--_, The northern part of the Southeast Three Sisters quadrangle strad- dles the crest of the central High Cascades of Oregon. The area is covered by Pleistocene and Holocene volcanic and volcaniclastic rocks that were extruded from a number of composite cones, shield volcanoes, and cinder cones. The principal eruptive centers include Sphinx Butte, The Wife, The Husband, and South Sister volcanoes. Sphinx Butte, The Wife, and The Husband are typical High Cascade shield and composite vol- canoes whose compositions are limited to basalt and basaltic andesite. South Sister is a complex composite volcano composed of a diverse assem- blage of rocks. In contrast with earlier studies, the present investi- gation finds that South Sister is not a simple accumulation of andesite and dacite lavas; nor does the eruptive sequence display obvious evolu- tionary trends or late stage divergence to basalt and rhyolite. Rather, the field relations indicate that magmas of diverse composition have been extruded from South Sister vents throughout the lifespan of this volcano. The compositional variation at South Sister is. atypical of the Oregon High Cascade platform. This variation, however, represents part of a continued pattern of late Pliocene and Pleistocene magmatic diver- sity in a local region that includes Middle Sister, South Sister, and Broken Top volcanoes. Regional and local geologic constraints combined with chemical and petrographic criteria indicate that a local subcrustal process probably produced the magmas extruded fromSouth Sister, whereas a regional subcrustal process probably producedthe magmas extruded from Sphinx Butte, The Wife, and The Husband.
    [Show full text]
  • A Tale of Three Sisters: Reconstructing the Holocene Glacial History and Paleoclimate Record at Three Sisters Volcanoes, Oregon, United States
    Portland State University PDXScholar Dissertations and Theses Dissertations and Theses 2005 A Tale of Three Sisters: Reconstructing the Holocene glacial history and paleoclimate record at Three Sisters Volcanoes, Oregon, United States Shaun Andrew Marcott Portland State University Follow this and additional works at: https://pdxscholar.library.pdx.edu/open_access_etds Part of the Geology Commons, and the Glaciology Commons Let us know how access to this document benefits ou.y Recommended Citation Marcott, Shaun Andrew, "A Tale of Three Sisters: Reconstructing the Holocene glacial history and paleoclimate record at Three Sisters Volcanoes, Oregon, United States" (2005). Dissertations and Theses. Paper 3386. https://doi.org/10.15760/etd.5275 This Thesis is brought to you for free and open access. It has been accepted for inclusion in Dissertations and Theses by an authorized administrator of PDXScholar. Please contact us if we can make this document more accessible: [email protected]. THESIS APPROVAL The abstract and thesis of Shaun Andrew Marcott for the Master of Science in Geology were presented August II, 2005, and accepted by the thesis committee and the department. COMMITTEE APPROVALS: (Z}) Representative of the Office of Graduate Studies DEPARTMENT APPROVAL: MIchael L. Cummings, Chair Department of Geology ( ABSTRACT An abstract of the thesis of Shaun Andrew Marcott for the Master of Science in Geology presented August II, 2005. Title: A Tale of Three Sisters: Reconstructing the Holocene glacial history and paleoclimate record at Three Sisters Volcanoes, Oregon, United States. At least four glacial stands occurred since 6.5 ka B.P. based on moraines located on the eastern flanks of the Three Sisters Volcanoes and the northern flanks of Broken Top Mountain in the Central Oregon Cascades.
    [Show full text]
  • Mineralogy and Trace Element Chemistry of Mazama Ash Soils
    AN ABSTRACT OF THE THESIS OF MAR VIN JOSEPH DUDASfor the DOCTOR OF PHILOSOPHY (Name of student) (Degree) inSOIL SCIENCE presented on August 11, 1972 (Major) (Date) Title: MINERALOGY AND TRACE ELEMENT CHEMISTRY OF MAZAMA ASH SOILS Abstract approved: Redacted for Privacy / M. E. Harward Investigations were conducted to (1) determine the origin of crystalline 2:1 and 2:2 type phyllosilicates in Mazama ash soils, (2) evaluate amount of contamination of ash with non-ash material for fine ash soils in Oregon and to compare the effects of contamination to effects of weathering, (3)evaluate authigenic clay mineral forma- tion in selected Mazama ash soils, and (4) determine petrological and chemical nature of the pyroclastic deposit in order to interpret the layers within the deposit and their implication to the eruptive history of Mount Mazama. Origin of 2:1 and 2:2 type phyllosilicates in soils of the coarse Mazama pumice was traced to the accidental lithic fragments in the deposit.Clay minerals in the < 2p, fraction separated from lithic fragments included chlorite, chloritic intergrades, mica, smectites, and possibly vermiculite.This inherited origin of crystalline clays is in contrast to the previously suggestedorigin which involved weathering of ash.For volcanic ash soils in forested areas located at distances farther than 100 km from the source(Crater Lake), 2:1 and 2:2 type clay minerals separatedfrom ash horizons were shown to have originated primarily from underlyingpaleosols. Crystalline clay suites in different ashy profilesexhibited greater similarity to their respective paleosol clay fractionsthan to each other.Once incorporated into ashy horizons, paleosol clayhigh in montmorillonite exhibited a slight tendency towards chloritization and samples high in mica exhibited some loss of interlayerK.
    [Show full text]
  • Istics Op Pumice from Glacier Peak, Washington and Mt
    A STUDY OF THE CHEMICAL AND PHYSICAL CHARACTER- ISTICS OP PUMICE FROM GLACIER PEAK, WASHINGTON AND MT. MAZAMA (CRATER LAKE), OREGON: REPORT OF PROGRESS, JUNE 16-SEPTEMBER 7, 1963 Research supported by the National Science Foundation through summer fellowships for Graduate Teaching Assistants by Virginia C. Steen LABORATORY OF ANTHROPOLOGY Division of Archaeology and Geochronology Washington State University Pullman, Washington INTRODUCTION In March of this year, the writer was awarded a twelve- week summer fellowship for the period June 16-September 7, 1963. At the time of application, it was proposed that much of the summer would be spent in on-campus research, with a small per- centage of time allotted for field work to supplement data al- ready collected. Subsequent investigations showed, however, that much valuable information could be obtained by extending the proposed field investigation. Accordingly, the summer work schedule was rearranged to include 30 full days of field work. A full breakdown of the summer work schedule is given in Table 1, TABLE 1 DISTRIBUTION OF WORKING TIME* FOR PERIOD JUNE 16 TO SEPTEMBER 7, 1963 Type of Research Days Total Time Field Includes: sample collecting, on-site soil «, topographic, and vegetation descriptions; travel to and from field area 30 4-5 Laboratory Includes: cleaning^ sorting, and de- scribing samples; crushing samples, performing heavy liquid and magnetic separations; developing and cultivating techniques; gathering equipment 18 27 Library Includes: bibliography search, and reading of pertinent
    [Show full text]
  • Neutron Activation Analysis for Correlating Volcanic Ash Soils
    AN ABSTRACT OF THE THESIS OF GLENN ARNOLD BORCHARDT for the Ph. D. (Name) (Degree) in SOILS presented on August 15, 1969 (Major) (Date) Title: NEUTRON ACTIVATION ANALYSIS FOR CORRELATING VOLCANIC ASH SOILS Redacted for Privacy Abstract approved: E, Harward The objectives of this study were:1)To determine the trace element differences between sample sites and between deposits of Mazama, Newberry, Glacier Peak, and St. Helens volcanic ash in the Pacific Northwest,2)To correlate volcanic ash in peat bogs with volcanic ash from upland sites,3)To verify Mazama ash as parent material of soils occurring along a 450 km transect inOregon, and 4)To determine the trace element composition of clays derived from volcanic ash. Samples were irradiated in a TRIGA Reactor, followed by detection of elements with a high resolution 30cc Ge(Li) semi- conductor detector and a 4096 multichannel analyzer. Gamma- ray spectra were analyzed with a computer program to determine the following average composition in Mazama volcanic glass: Ele- Ele- Ele- ment ppm s mentppm ±5 mentppm ±S Na 3.44% .16% Sm5.0 .4 Hf 6.4 .4 Rb 50, 8. Eu0.89 .08 Ta 0.23 .08 Cs 3.9 .7 Tb 0.83 .14 Co 2,6 .3 Ba 660. 70. Yb 3,5 .7 Fe1.48%.09% La 22. 2, Lu 0.56 .07 Sc 6.4 .4 Ce 44. 3, Th 6,5 .3 Cr 1.6 .6 Field variability of Mazama and Newberry ash deposits in Oregon was about 5%, whereas the variability of the crystal-rich Glacier Peak and St.
    [Show full text]
  • Mount Mazama and Crater Lake: a Study of the Botanical and Human Responses to a Geologic Event
    AN ABSTRACT OF THE THESIS OF Robyn A. Green for the degree of Master of Arts in Interdisciplinary Studies in Geology. Botany and Plant Pathology. and Anthropology presented on June 3. 1998. Title: Mount Mazama and Crater Lake: A Study of the Botanical and Human Responses to a Geologic Event Abstract approved: / Robert J. Lillie Crater Lake, located in the southern Cascade mountains of Oregon, is the seventh deepest lake in the world. Unlike a majority of the deepest lakes in the world, found in continental rift valleys, Crater Lake is in the caldera of a volcano. For the young at heart and mind, those willing to descend (and ascend) about 700 feet to Cleetwood Cove can undertake a boat tour of Crater Lake. From the boat, Crater Lake is more than just a beautiful blue lake; it becomes the inside of a volcano, where the response of people and plants to a geologic event can be investigated. The catastrophic eruption of Mount Mazama 7,700 years ago affected both plant and human populations. Before pumice and ash from the volcano blanketed the landscape like freshly fallen snow, the forests to the east of Mount Mazama were dominated by ponderosa and lodgepole pine. Within the immediate vicinity of the volcano all life was obliterated; the force of the eruptive material toppled vegetation and buried it with ash and pumice. Through the recovery process of succession, life has slowly returned to Crater Lake. Forests surrounding the lake are now dominated by mountain hemlock, whitebark pine, and lodgepole pine. These plants not only depict the process of succession, but also of adaptation to a volcanic environment.
    [Show full text]
  • The Neoglacial History of Mt. Thielsen, Southern Oregon Cascades
    Portland State University PDXScholar Dissertations and Theses Dissertations and Theses 6-8-2001 The Neoglacial History of Mt. Thielsen, Southern Oregon Cascades Martin Dietrich Lafrenz Portland State University Follow this and additional works at: https://pdxscholar.library.pdx.edu/open_access_etds Part of the Geography Commons Let us know how access to this document benefits ou.y Recommended Citation Lafrenz, Martin Dietrich, "The Neoglacial History of Mt. Thielsen, Southern Oregon Cascades" (2001). Dissertations and Theses. Paper 2429. https://doi.org/10.15760/etd.2426 This Thesis is brought to you for free and open access. It has been accepted for inclusion in Dissertations and Theses by an authorized administrator of PDXScholar. For more information, please contact [email protected]. THESIS APPROVAL The abstract and thesis of Martin Dietrich Lafrenz for the Master of Science in Geography were presented June 8, 2001, and accepted by the thesis committee and the department. COMMITIEE APPROVALS: Teresa L. Bulman Scott Burns Representative of the Office of Graduate Studies DEPARTMENT APPROVAL: Teresa Bulman, Chair Department of Geography ABSTRACT An abstract of the thesis of Martin Dietrich Lafrenz for the Master of Science in Geography presented June 8, 2001. Title: The Neoglacial History of Mt. Tbielsen, Southern Oregon Cascades. Little Ice Age (LIA) deposits are recognized on Mt. Tbielsen, southern Oregon Cascades (43° 9' N, 122° 3' W), based on particle morphology and relative position. The initial advance, Lathrop 1, created a sharp-crested moraine and a protalus rampart within 200 m of the headwall. The retreat of the glacier and recent ice movement, Lathrop 2, is recognized by the deformation of the moraine and a mantle of "protalus till" creating a polygenetic "push-deformation'' moraine.
    [Show full text]
  • Volcanic-Ash-Derived Forest Soils of the Inland Northwest: Properties and Implications for Management and Restoration
    Volcanic-Ash-Derived Forest United States Department Soils of the Inland Northwest: of Agriculture Properties and Implications for Forest Service Rocky Mountain Management and Restoration Research Station Proceedings RMRS-P-44 9-10 November 2005 March 2007 Coeur d’Alene, ID Page-Dumroese, Deborah; Miller, Richard; Mital, Jim; McDaniel, Paul; Miller, Dan, tech. eds. 2007. Volcanic-Ash-Derived Forest Soils of the Inland Northwest: Properties and Implications for Management and Restoration. 9-10 November 2005; Coeur d’Alene, ID. Proceedings RMRS-P-44; Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 220 p. Abstract ________________________________________ Volcanic ash from the eruption of Mt. Mazama ~7,700 years ago has a strong influ- ence on many forested landscapes of the Pacific Northwest and Intermountain regions of the USA and Canada. Because of the unique biological, physical and chemical properties of the ash, it is closely tied to plant communities and forest productivity, and should therefore be considered as a resource to protect when harvesting, burning, or site preparation activities occur on it. How did this symposium get started? There has been a steady stream of questions, problems, and research on volcanic ash-cap soils for many decades. This symposium was designed to assemble experts to discuss our state-of-knowledge about volcanic ash-cap soil management and restoration. About 200 scientists and natural resource managers participated in this conference, which was held at the Coeur d’Alene Resort, Coeur d’Alene, ID in November 2005. The Technical Committee __________________________ Deborah S. Page-Dumroese is a Research Soil Scientist and Project Leader, Rocky Mountain Research Station.
    [Show full text]
  • Andesite Conference Guidebook
    ANDESITE CONFERENCE GUIDEBOOK I NTERNATI 0 NAL UPPER MANTLE PROJECT Sci enti fi c Report 16-S Published by: State of Oregon, Department of Geology and Mineral Industries, as Bulletin 62 International UPPER MANTLE COMMITTEE Prof. V. V. BELOUSSOV, Chairman (Moscow) Dr. Luis R. A. CAPURRO (Buenos Aires) Prof. A. E. RINGWOOD (Canberra) Dr. J. M. HARRISON (Ottawa) Prof. S. K. RUNCORN (Newcastle-upon-Tyne) Prot. Leon KNOPOFF, Secretary-General (Los Angeles) Dr. Klyoo \,VADATI (Tokyo) ANDESITE CONFERENCE July 1 to 6, 1968 Eugene and Bend, Oregon U. S. A. Sponsored by: University of Oregon Center for Volcanology A. R. McBirney, Director International Upper Mantle Committee Prof. Hisashi Kuno, Chairman Working Group on Petrology and Volcanism State of Oregon Department of Geology and Mineral Industries H. M. Dole, State Geologist Financial assistance for the Andesite Conference was provided by the International Union of Geodesy and Geophysics and by the International Union of Geological Sciences. The Upper Mantle Project is an international program of research on the solid earth sponsored by the International Counci I of Scientific Unions; the program is coordinated by the International Upper Mantle Committee, an IUGG committee set up jointly by the International Union of Geodesy and Geophysics and the International Union of Geological Sciences, with rules providing for the active participation of all interested ICSU Unions and Committees. Cover Picture: Andesite Thin Section Cover design is a microdrawing of the hypersthene-augite andesite at the highest peak of Mount jefferson. The rock is typical of the andesites of the Oregon Cascades in both its petrographic features and chemical composition.
    [Show full text]
  • Volcanic Ash Identification at Saltese Flats, Eastern Spokane County, Washington
    Volcanic Ash Identification at Saltese Flats, Eastern Spokane County, Washington Andrew Buddington Alan Belasco Katlin Gamache Jalyn Osgood Science Department, Spokane Community College, Spokane, Washington Corresponding author E-mail address: [email protected] Image courtesy of Spokane County June 2021 PROJECT OVERVIEW Saltese Flats, in eastern Spokane County, is a wetland marsh area underlain by extensive peat deposits. In 1958, a study evaluating peat resources in Washington State reported a significant buried tephra horizon from a series of soil bore holes (Rigg, 1958). The tephra was not described in detail, and a volcanic source was not correlated. In 2019, the Spokane County wetlands restoration project at the site afforded direct examination of the tephra (ash), via excavation. This study presents the results of trench mapping, sampling, and tephra characterization from the Saltese site along with the volcanic source identification and correlation using glass shard geochemistry. INTRODUCTION The Cascade Range consists of nearly twenty active or recently dormant volcanoes along the western portions of California, Oregon, Washington, and British Columbia. The modern Cascade volcanoes, known as the “High Cascades”, are dominated by composite volcanoes and have been erupting for at least the last 1 million years. In the last 4,000 years alone, the United States Geological Survey (USGS) has identified multiple major eruptions from 13 separate Cascade volcanoes (Myers and Driedger, 2008). Volcanic ash from Alaskan volcanoes and the Yellowstone caldera have also been identified. Needless to say, significant amounts of volcanic ash from multiple sources and different dates have been deposited over the western United States and Canada.
    [Show full text]
  • Map of Distribution of Ash from Mt. St. Helens, 916-917
    CS_Ch14_Volcanoes 3/1/2005 5:57 PM Page 916 Volcanoes Investigate 1. Look at the map of the 1980 a) How many states showed at least eruption of Mt. St. Helens. It shows a trace of volcanic ash? the pattern of ash. Use the map to b) In what direction did the ash move? answer the following questions: c) Was Canada affected by ash from Spokane Mt. St. Helens? Why or why not? Ritzville d) Would you consider this a small, Mount Yakima St. Helens medium, large, or gigantic eruption? Explain your choice. 2. Make a bar graph of the data shown in the table. a) Plot the name of each volcano on the horizontal axis. 2 to 5 inches b) Plot the volume of volcanic 1/2 to 2 inches Mount St. Helens' eruption on the vertical axis. Trace to 1/2 inch May 18, 1980 ash fallout distribution within the U.S. Arrange the volumes in order Distribution of ash from Mt. St. Helens eruption. from least to greatest. Volumes of Volcanic Eruptions Volume Volcano Date (cubic kilometers) Ilopango, El Salvador 300 40 Krakatoa, Indonesia 1883–84 2.4 Long Valley, California 740,000 years ago 500 (Bishop Tuff) Mazama, Oregon 4000 B.C.75 Mt. Pelée, Martinique 1902 0.5 Mt. St. Helens,Washington 1980 1.25 Nevado del Ruiz, Colombia 1985 0.025 Pinatubo, Philippines 1991 10 Santorini, Greece 1450 B.C.60 Tambora, Indonesia 1815 150 Valles, New Mexico 1.4 million years ago 300 Vesuvius, Italy 79 3 Yellowstone,Wyoming 600,000 years ago 1000 (Lava Creek Ash) Note:Volumes are approximate.
    [Show full text]