California's Geology & Plate Tectonics | California Geography with Professor Jeremy Patrich

This video introduces the basic geology of California's dynamic past and future. We learn that the geology of California is highly complex, with numerous mountain ranges, substantial faulting, and tectonic activity, rich natural resources, and a history of both ancient and comparatively recent intense geological activity. Other topics include the San Andreas Fault, Geologic history and timelines, and volcanoes.

#California, #Geology, #SanAndreas

🧭 Find Jeremy here:
📸 Instagram: https://www.instagram.com/calgeog/?hl=en
📧 E-mail: CaliforniaGeographer@gmail.com

---------------Content In This Video---------------
00:00​ - Introduction - The Geology of California
01:54​ - Geologic Complexity - California
04:57 - Physiographic Provinces of California
14:59 - Faulting & Deformation
18:15 - The Farallon Plate
22:34 - Surface Processes
24:31 - Geologic Time - Introduction
28:35 - Geologic Time - Californias Tectonic Past
33:20 - California's Oldest Rocks - Recap of Geologic Time
35.12 - Geologic Time- Glaciers
The oldest rocks in California date back 1.8 billion years to the Proterozoic and are found in the San Gabriel Mountains, San Bernardino Mountains, and Mojave Desert. The rocks of eastern California formed a shallow continental shelf, with massive deposition of limestone during the Paleozoic, and sediments from this time are common in the Sierra Nevadas, Klamath Mountains and eastern Transverse Range.

Active subduction began in the Triassic during the Mesozoic, producing large granite intrusions and the beginning of the Nevadan Orogeny as well as more dryland conditions and the retreat of the ocean to the west. Throughout the Jurassic the Nevadan Orogeny accelerated with large-scale granitic intrusions and erosion into deep marine basins. These basins steadily filled with sediment, with one famous example preserved as the Great Valley beds in the Coast Ranges. Simultaneously island arcs and small sections of continental crust rafted onto the edge of North America, building out the continent.

During the Cenozoic, the volcanic and deep water sedimentary Franciscan rocks were accreted to the edge of California and vast areas of marine sedimentary rocks deposited in the Central Valley and what would become the Transverse and Coast Ranges. Examples of filled basins included the Los Angeles Basin, the Eel River Basin around Eureka or the 50,000 foot thick sedimentary sequences of the Ventura Basin. The San Andreas Fault became perhaps most active after the Miocene, potentially resulting in up to 350 miles of offset in some locations.

Видео California's Geology & Plate Tectonics | California Geography with Professor Jeremy Patrich канала Prof. Jeremy Patrich