Structural Control on Distribution of Sedimentary Facies in the Pennsylvanian Minturn Formation of North-central Colorado


Book Description

Field study of the middle part of the Pennsylvanian Minturn Formation in the McCoy-Bond area of north-central Colorado has yielded evidence for structural influences on sedimentation. The McCoy-Bond area was probably located near an en echelon offset in the fault zone bounding the eastern margin of the basin. Paleocurrent measurements show that sediment transport in nonmarine drainages and in marine deltas and turbidites was consistently to the south during several transgressive-regressive intervals. These trends may have been controlled by a topographic low that extended south from the offset zone to a termination in the southern part of the area. Mapping of sediment packages shows that drainages and sites of delta and turbidite accumulation were repeatedly established near the traces of two north-south- oriented faults. The sediment packages also thicken and are more completely preserved closer to the fault traces. These trends suggest that these faults were active during middle Minturn deposition. Individual fault blocks delineated by facies and thickness changes are similar in structural style to the Vail-McCoy trough, the Avon-Edwards high, and the Eagle sub-basin defined by other workers and illustrate the control of structure on sedimentation in the central Colorado basin.










Masters Theses in the Pure and Applied Sciences


Book Description

Masters Theses in the Pure and Applied Sciences was first conceived, published, and dis seminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the ac tivity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volume were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 24 (thesis year 1979) a total of 10,033 theses titles from 26 Canadian and 215 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work. While Volume 24 reports these submitted in 1979, on occasion, certain universities do report theses submitted in previous years but not reported at the time.