Segmentation, Slip Rate, and Uplift History of the Red Mountain-San Cayetano-Santa Susana-Sierra Madre-Cucamonga Reverse Fault System, California PDF Download
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Author: Robert S. Yeats
Publisher:
ISBN:
Category : Faults (Geology)
Languages : en
Pages :
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Book Description
Author: Robert S. Yeats
Publisher:
ISBN:
Category : Faults (Geology)
Languages : en
Pages :
Get Book Here
Book Description
Author: Robert S. Yeats
Publisher:
ISBN:
Category : Faults (Geology)
Languages : en
Pages :
Get Book Here
Book Description
Author: Robert S. Yeats
Publisher:
ISBN:
Category : Faults (Geology)
Languages : en
Pages :
Get Book Here
Book Description
Author: Robert S. Yeats
Publisher:
ISBN:
Category : Faults (Geology)
Languages : en
Pages :
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Book Description
Author: Jonathan J. Ingram
Publisher:
ISBN:
Category :
Languages : en
Pages : 484
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The Santa Susana fault (SSF) is the western extension of the Sierra Madre fault zone in southern California. It originated as a Miocene normal fault and reactivated as a reverse fault in the Quaternary, uplifting the Santa Susan Mountains. In the current seismic hazard model, the SSF has a poorly constrained slip rate. This study utilized U-Pb detrital zircon geochronology, modal compositions, clast counts, and balanced cross-sections to resolve the Quaternary slip history of the SST. Clast analyses in the footwall Saugus Formation show an upsection transition from dominantly crystalline basement rocks to sedimentary rocks. Modal composition data indicates each sampled sandstone formation is arkosic (>55% feldspar), with few lithic grains (5-15%), derived from a local basement uplift.
Author: Christian P. Walls
Publisher:
ISBN:
Category :
Languages : en
Pages : 262
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Author: Jacob Allen Horner
Publisher:
ISBN:
Category :
Languages : en
Pages : 130
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Publisher: Geological Society of America
ISBN: 0813724759
Category : Science
Languages : en
Pages : 56
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"The San Jacinto right-lateral strike-slip fault zone is crucial for understanding plate-boundary dynamics, regional slip partitioning, and seismic hazards within the San Andreas fault system of southern California, yet its age of initiation and long-term average slip rate are controversial. This synthesis of prior and new detailed studies in the western Salton Trough documents initiation of structural segments of the San Jacinto fault zone at or slightly before the 1.07 Ma base of the Jaramillo subchron. In Special Paper 475, five new estimates of displacement are developed using offset successions of crystalline rocks; distinctive marker beds in the late Cenozoic basin fill; analysis of strike-slip-related fault-bend folds; quantification of strain in folds at the tips of dextral faults; and gravity, magnetic, and geomorphic data sets."--Publisher's website.
Author: Austin M. Hanson
Publisher:
ISBN:
Category :
Languages : en
Pages : 382
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The Sierra Madre fault (SMF) is an east-west striking reverse fault system along the southern flank of the San Gabriel Mountains near Los Angeles, California. The 140 km-long SMF is separated into four segments; I focus on the multi-stranded, 55 km-long Central Sierra Madre fault (CSMF). The CSMF lacks a well-characterized geologic slip rate, and the goal of this study is to constrain the CSMF slip rate using offset alluvial fan terraces dated by terrestrial cosmogenic nuclide and infrared-stimulated luminescence, The study area includes three catchments along the western third of the CSMF, where I modify previous geologic mapping using field observations and analysis of lidar digital elevation models (DEMs) to delineate terrace flights in greater detail. Vertical separation estimates are derived from 12-44 m-wide topographic swath profiles that were extracted from 0.5-3.0 m-resolution lidar DEMs. Dip-slip displacements were calculated from observed vertical separations and fault geometry. Monte Carlo error propagation was used to estimate slip rates with uncertainties for the western CSMF of 0.96 +3.61/-0.61, 1.17 +3.27/-0.57, 0.70 +1.28/-0.33 and 1.19 +1.31/-0.48 mm/yr. The main source of uncertainty in these estimates is derived from poorly-constrained fault dips. This study indicates that in general, the surface age estimates are in agreement with other terrace age estimates in the region and that the CSMF is in the late stages of a strain accumulation cycle. My CSMF slip rate estimates relative to the other SMF segments suggest that slip rate partitioning along the SMF does not vary monotonically, which I attribute to interaction with other faults, such as the Puente Hills, within the structurally complex Los Angeles region.
Author:
Publisher:
ISBN:
Category : Faults (Geology)
Languages : en
Pages : 80
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