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- W2803199440 abstract "[Major Thesis Abstract] Arrival times, amplitudes, and periods of the seismic phases SKS and SKKS have been investigated for normal, intermediate, and deep earthquakes recorded at Pasadena and Huancayo, Peru. New observed time-distance curves are constructed for depths of Energy parameters determined from observed amplitude/period ratios are found in only fair agreement with those calculated from theory. Observed energies are too large for most of the phase components and depths considered. The horizontal components of SKKS over the whole distance range, and of SKS at Δ Anomalous observed energies, as a function of epicentral location, can also be accounted for by the proposed non-spherical distribution of energy. A similar regional phase-period dependence is considered in terms of finite faulting velocities. Times, energies, and periods of multiple SKS phases for the depths studied are presented. No single hypothesis commensurate with all observed conditions is found, but the phases pSKS and sSKS for normal shocks are probably represented. [Minor Thesis Abstract] On the west flank of the Sawatch Range, Colorado, evidence is found for six distinct glacial advances. One glaciation is pre-Wisconsin, four are Wisconsin, and one post-Wisconsin in age. In addition to end and lateral moraines of each advance, terrace remnants of six valley trains were identified and studied for a distance of 25 miles along Frying Pan River and its major tributaries. Elevations above stream level of these outwash terraces are 400±50, 90-120, 40-50, 20-30, 12-17, and 6-8 feet. Five of the tributary valleys contained ice streams which did not join the trunk Frying Pan glacier during the Wisconsin stage. An extensive review and testing of the numerous criteria used to distinguish deposits of multiple glaciations shows that nine of these criteria can conveniently be expressed in parameters indicative of relative age. Estimates based on these criteria, coupled with a recent radiocarbon dating of late Mankato till in the Midwest, yield the following approximate ages for deposits of the six glaciations in FryingPan Valley: 230,000, 63,000, 46,000, 17,000, 11,500, and 5,750 years. The accuracy and reliability of the procedure used cannot be evaluated without further absolute Carbon-14 age determination." @default.
- W2803199440 created "2018-06-01" @default.
- W2803199440 creator A5025312201 @default.
- W2803199440 date "1952-01-01" @default.
- W2803199440 modified "2023-09-23" @default.
- W2803199440 title "A Study of the Seismic Waves SKS and SKKS. Glacial Geology of the Frying Pan River Drainage, Colorado" @default.
- W2803199440 doi "https://doi.org/10.7907/wwwd-0t60." @default.
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