Journal ArticleDOI
Strike-slip faulting terminates the Basin and Range province in Oregon
Reads0
Chats0
TLDR
In this article, the pattern of faulting in southeastern Oregon is interpreted in terms of four major zones of right-lateral strike-slip faulting that separate blocks broken by normal faulting.Abstract:
The pattern of faulting in southeastern Oregon is interpreted in terms of four major zones of right-lateral strike-slip faulting that separate blocks broken by normal faulting. The total amount of east-west extension is considered to decrease in the block north of each strike-slip fault zone. The right-lateral offset results from the decrease in extension. Extension essentially dies out across the northern two fault zones, which are thus considered the northern limit of the Basin and Range province. The greatest offset is apparently recorded on the next zone to the south by the displacement of the eastern edges of the Sierra Nevada and Idaho batholiths. The two southern zones offset the Pleistocene to Holocene trend of the High Cascades by 10 to 20 km in a right-lateral sense. The Brothers fault zone, one of the northern zones, is regarded as of special interest because both ends of the fault are interpreted to be exposed at the surface.read more
Citations
More filters
Journal ArticleDOI
Strike-Slip faults
TL;DR: The importance of strike-slip faulting was recognized near the turn of the century, mainly from investigations of surficial offsets associated with major earthquakes in New Zealand, Japan, and California.
Journal ArticleDOI
Cordilleran metamorphic core complexes: Cenozoic extensional relics of Mesozoic compression
Peter J. Coney,Tekla A. Harms +1 more
TL;DR: In this article, a model that unifies the age and tectonic significance of the Cordilleran metamorphic core complexes was proposed, which reconciles opposing views of the core complexes and places them in a more comprehensible setting with respect to Mesozoic-Cenozoic thermotectonic history.
Journal ArticleDOI
Eruptive history of Mount Mazama and Crater Lake Caldera, Cascade Range, U.S.A.
TL;DR: The history displayed in the caldera walls begins with construction of the andesitic Phantom Cone ∼ 400,000 yr B.P. as mentioned in this paper, which was probably active for a comparatively short interval.
Journal ArticleDOI
Geometry of Subducted Slabs Related to San Andreas Transform
TL;DR: In this paper, the San Andreas transform by rise-trench encounter in coastal California influenced the structural evolution of a large region within the adjacent continent, and the lack of subduction at the transform plate boundary along the California continental margin led to the growth of a slab-free region beneath the part of the continental block adjacent to the san Andreas transform.
Book
The Quaternary and Pliocene Yellowstone plateau volcanic field of Wyoming, Idaho, and Montana
TL;DR: Oversby and others as mentioned in this paper pointed out that these large linear blocks are not all necessarily related to specific eruptive events but are more complex synvolcanic subsided blocks, and they regarded the blocks as first-order volcano-tectonic subsidence features that include individual cauldrons, which they considered to be second-order volcanic subsidence structures.
References
More filters
Journal ArticleDOI
Similarities between Shear Zones of Different Magnitudes
TL;DR: In this article, an examination of the formation and development of shear zone structures on microscopic scale in the shear box test, intermediate scale in Riedel experiment, and regional scale in earthquake fault is made.
Journal ArticleDOI
Garlock Fault: An Intracontinental Transform Structure, Southern California
Gregory A. Davis,B. C. Burchfiel +1 more
TL;DR: In this paper, the authors interpret the Garlock fault as an intracontinental transform structure which separates a northern crustal block distended by late Cenozoic basin and range faulting from a southern, Mojave block much less affected by dilational tectonics.
Journal ArticleDOI
Basin and Range Structure: A System of Horsts and Grabens Produced by Deep-Seated Extension
TL;DR: Basin and Range structure can be interpreted as a system of horsts and grabens produced by the fragmentation of a crustal slab above a plastically extending substratum.
Journal ArticleDOI
Late Cenozoic Evolution of the Great Basin, Western United States, as an Ensialic Interarc Basin
TL;DR: In this article, the authors suggest that the spreading is caused by a mantle diapir mobilized by the descending lithospheric slab, and flattens and spreads out laterally as it rises.