Portland State University. Department of Geology
Michael L. Cummings
Date of Award
Master of Science (M.S.) in Geology
1 online resource (126 p.)
Geophysical well logging -- Data processing, Stratigraphic Geology -- Statistical methods, Stratigraphic Geology -- Tertiary, Coal -- Geology -- Oregon -- Coos County
A computer technique for interpreting geophysical logs of drill-holes in quantitative lithologic terms has been developed and tested on the deposits of the late Eocene Coaledo Formation, a well-studied fluvio-deltaic complex in southwestern Oregon. The technique involves the use of induced and natural gamma logs for separation of coal and claystone from coarse-grained detrital rocks and the use of the ratio of resistivity and natural gamma responses (defined here as the "grain size index") to divide the coarse elastic rocks into a series of textural classes corresponding to the Wentworth-Odden particle size scale.
Titus, Willard Sidney III, "Development and application of some quantitative stratigraphic techniques to the Coos Bay coalfield, a Tertiary fluvio-deltaic complex in southwestern Oregon" (1987). Dissertations and Theses. Paper 3730.