Faithin Omaha eBook Collection

Download or read book Quaternary Uplift and Deformation of the Western Transverse Ranges and Santa Maria Basin of South-central Coastal California Using Marine Terraces written by Eric Robert Tutterow (Graduate student) and published by . This book was released on 2021 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The western Transverse Ranges and southern Coast Ranges of California are adjacent to one another but experience different deformation styles and rates. We used marine terraces along the coast between these two areas as markers to see how the fast rates of uplift and deformation in the western Transverse Ranges transition to slower rates in the southern Coast Ranges. Recent improvements to sediment dating techniques, paleo sea-level curves, and remote imagery allowed for mapping of marine terraces from Point Conception to Point Sal in south-central coastal California to fill data gaps in coastal uplift rates and evaluate implications for existing data and models to better understand amount and timing of local and regional uplift. We used post infrared-infrared stimulated luminescence dating to determine ages of two flights of marine terraces at five locations. Refined terrace chronology indicates the lowest emergent marine terrace formed ~49.5 ka and the other, higher emergent marine terrace formed ~84 ka. Refined terrace ages suggest rock uplift rates ranging from 0.59 to 1.96 m/ka throughout the study area from 84 ka to present. Our data suggests the Santa Maria Basin, which is the transition zone between the rotating Transverse Ranges and non-rotating southern Coast Ranges, has coastal uplift rates more similar to the western Transverse Ranges than the southern Coast Ranges. Our data is consistent with models that attribute Quaternary shortening and uplift of the Santa Maria Basin to ongoing vertical axis rotation of the western Transverse Ranges, which is accommodated by an underlying detachment fault and ramp.