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TiO2 and Geophysical Logging Criteria for Yakima Basalt Correlation, Columbia Plateau

1974; Geological Society of America; Volume: 85; Issue: 7 Linguagem: Inglês

10.1130/0016-7606(1974)85 2.0.co;2

1943-2674

BARBARA A. SIEMS, John H. Bush, James W. Crosby,

Geology and Paleoclimatology Research

Research Article| July 01, 1974 TiO2 and Geophysical Logging Criteria for Yakima Basalt Correlation, Columbia Plateau BARBARA A. SIEMS; BARBARA A. SIEMS 1Geohydrology Section, College of Engineering, Washington State University, Pullman, Washington 99163 Search for other works by this author on: GSW Google Scholar JOHN H. BUSH; JOHN H. BUSH 1Geohydrology Section, College of Engineering, Washington State University, Pullman, Washington 99163 Search for other works by this author on: GSW Google Scholar JAMES W. CROSBY, III JAMES W. CROSBY, III 2Geohydrology Section and Department of Geology, Washington State University, Pullman, Washington 99163 Search for other works by this author on: GSW Google Scholar Author and Article Information BARBARA A. SIEMS 1Geohydrology Section, College of Engineering, Washington State University, Pullman, Washington 99163 JOHN H. BUSH 1Geohydrology Section, College of Engineering, Washington State University, Pullman, Washington 99163 JAMES W. CROSBY, III 2Geohydrology Section and Department of Geology, Washington State University, Pullman, Washington 99163 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1974) 85 (7): 1061–1068. https://doi.org/10.1130/0016-7606(1974)85 2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation BARBARA A. SIEMS, JOHN H. BUSH, JAMES W. CROSBY; TiO2 and Geophysical Logging Criteria for Yakima Basalt Correlation, Columbia Plateau. GSA Bulletin 1974;; 85 (7): 1061–1068. doi: https://doi.org/10.1130/0016-7606(1974)85 2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Correlation of Yakima Basalt flows across areas of poor exposure can be facilitated by use of TiO2 analyses combined with geophysical borehole logging procedures. Previous workers have noted a change in the TiO2 content between the lower and middle Yakima Basalt. This investigation shows that the TiO2 discontinuity is coincident with an erosional and nondepositional hiatus which is widespread in central and southeastern Washington. TiO2 values below the discontinuity characteristically range from 1.7 to 2.0 percent whereas those above range from 2.5 to >3.5 percent.Gamma photon emission associated with the 40K content of certain flows and flow sequences can be used in correlating the basalts with natural gamma logs. Physical characteristics of individual flows and flow? units can generally be distinguished on the neutron-epithermal neutron log. By combining a knowledge of the position of the TiO2 discontinuity with the information afforded by the geophysical logs, it is frequently possible to correlate the section in a well or borehole with nearby described stratigraphic sections or similarly studied sections in other boreholes. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.