Thesis (M.S.)--Oregon State University, 1992. / Typescript (photocopy). Includes bibliographical references (leaves 109-124). Also available via the World Wide Web.

Thesis (MS)--Montana State University--Bozeman, 2009. / Typescript. Chairperson, Graduate Committee: David R. Lageson. Includes bibliographical references (leaves 81-88).

Thesis (M.Sc.)--Memorial University of Newfoundland, 2002. / One folded map in pocket. Bibliography: leaves R-1-R-15. Also available online.

Thesis (Ph.D.)--Memorial University of Newfoundland, 1993. / Bibliography: leaves 288-303. Also available online.

Thesis (Ph. D.)--University of California, Santa Cruz, 1987. / Typescript. "These papers describe faulting and folding observed on the seafloor using SeaMARC II side-scan sonar, seismic reflection, and 3.5 kHz data"--P. 1. Includes bibliographical references.

Mylonitic rocks of the Shoo Fly Complex form a region of epidote-amphibolite grade quartzose and granitoid gneiss, subordinate schist and calcareous rocks, and rare amphibolite in the foothills of the Sierra Nevada range in central California. The Shoo Fly has endured a complicated Phanerozoic structural development involving seven superposed deformations at variable crustal depths. The first four of these (D1-D4) involved tight to isoclinal folding and shearing under medium grade metamorphic conditions. The last three (D5-D7) are marked by open folding and retrograde metamorphism of older fabric elements. The Shoo Fly is in ductile fault contact with east-dipping argillite, chert, and marble of the Calaveras Complex. The Calaveras-Shoo Fly thrust formed during D3 and is a 1-2 km wide syn-metamorphic ductile shear zone. Recognition of D3 overprinting of older Dl+D2 fabrics along the thrust zone indicates that upper plate Shoo Fly rocks record an earlier and more complex structural history than the lower plate Calaveras rocks. Paleozoic gneissic granitoids, an important lithologic component of the Shoo Fly, were intruded as a series of plutons ranging from calc-alkaline gabbro to granitoid (predominate) to syenite. They truncated the early S1 foliation in the Shoo Fly and were folded during regional D2 and D3 events when they were penetratively deformed into augen gneiss, blastomylonite, and ultramylonite. The Sonora dike swarm occurs as an areally extensive (> 1500 km2) subvertical consanguineous suite of andesite, lamprophyre, and basalt dikes that trend east-west across the Calaveras and Shoo Fly Complexes. The metamorphic complexes form the basement to a middle Jurassic calc-alkaline plutonic arc (Jawbone granitoid sequence). A middle Jurassic K-Ar age on the dikes (157-159 m.y.) together with the data of this report indicate that they are petrogenetically related to the Jawbone granitoid sequence and that the dikes probably formed during subduction beneath a continental arc. The dikes provide an important structural marker in the Shoo Fly and Calaveras Complexes. Intrusion of the dike swarm was sensitive to a structural anisotropy in the basement complexes. Since they intruded east-west along a spaced regional schistosity developed during folding of the Calaveras-Shoo Fly thrust, thrusting and subsequent folding were clearly pre-middle Jurassic events. Available geochronologic data sets middle Ordovician to late Devonian intrusive ages for the gneissic granitoids, establishing a pre-late Devonian depositional age for the Shoo Fly. D1 and intrusion of the orthogneiss protoliths may have been precursors of the Late Devonian to Early Mississippian Antler orogeny or, alternatively, may have occurred significantly earlier than the Antler orogeny. Based on cross-cutting relations, D2 formed during the Antler orogeny, D3 and possibly D4 during the Sonoma orogeny, and D5 and D6 during the Nevadan orogeny.

No description available.

M. S.

Folding prior to thrust-sheet emplacement is proposed to explain presence of overturned synclines in the footwalls of many thrust-faults in the Appalachian foreland fold- and thrust-belt of southwest Virginia. Investigation of relations in the footwalls of the Saltville and St. Clair thrust-sheets near the Southern-Central Appalachian juncture indicates presence of at least two distinct types of footwall structures: 1)isolated forelimbs of thrust-truncated asymmetric ramp-generated anticlines, and 2)areally extensive overturned subthrust synclines. Mesoscopic fabric data and strain states indicate rotation of bedding by folding prior to thrust-sheet emplacement rather than drag folding during thrusting. Low angles between bedding and cleavage planes and low strain values on the back limbs of folds at thrust terminations (Sinking Creek anticline) and in hangingwall strata seems to indicate folding was largely accomplished by flexural flow in units of relatively low mechanical strength. / M.S.

Reprocessing of Appalachian Ultradeep Core Hole (ADCOH) southern Appalachian seismic reflection data was focused on improving the reflection imaging and hence interpretability of seismic signatures previously interpreted as duplexes created by thrust stacking of thin beds of Paleozoic shelf strata. The reprocessed data are used to determine a more unique depth domain geometry for one of the proposed duplexes. Reprocessed data are partially improved through an increase in both stacking velocity coverage and datum statics velocity coverage as well as an appropriate use of residual statics. Interpretability increases from the improvement in resolution and the consideration of geologic strike direction relative to profile direction. Initial shotpoint ray trace modeling shows the chaotic nature of raypaths and some of the problems associated with the imaging of reflections when complex geology is involved. Data reprocessing and two-dimensional ray trace modeling yield results which suggest that the studied seismic signature is part of a broad hinterland-dipping duplex. At the trailing edge of the duplex itself beds appear to be successively fault truncated, perhaps explaining the increased amplitude and reflectivity in this zone. The truncations result in a wedge-shaped geometry that resembles the trailing edge of an antiformal stack duplex. The improved data also show 1) a shallow band of reflections that correlate with the Shope Fork and Chunky Gal Mountain faults within the Blue Ridge allochthon, 2) thrust ramping initiated by basement faulting that extends only a short distance into the overlying sedimentary strata, 3) a more highly faulted Grenville basement surface and, 4) almost intact Paleozoic shelf strata (?) being carried along the thrust surface serving and bounding the hinterland-dipping duplex. / M.S.