Philip Thomas Tyson (1799–1877) toured privately through central California, from San Francisco through the Sierra Nevada foothills gold prospects in 1849, to assess their potential and the general geology of the region. He produced the first regional map with geologic notations and several rough topographic/geologic cross-sections. He described Coast Range basement rocks, now described as Franciscan Complex mélange and broken formation, the stratigraphic configuration of the Great Valley, and general geology of the Sierra Nevada foothills. He recognized that the older Coast Range and Sierran basement were deformed prior to recent volcanism and extensive terrestrial fluvial sedimentation, likely Neogene in age.
Skip Nav Destination
Research Article| January 01 2017
Philip Tyson's 1849 study of California gold prospects
Earth Sciences History (2017) 36 (1): 30–40.
- Views Icon Views
- Share Icon Share
- Search Site
K. R. Aalto; Philip Tyson's 1849 study of California gold prospects. Earth Sciences History 1 January 2017; 36 (1): 30–40. doi: https://doi.org/10.17704/1944-6178-36.1.30
Download citation file:
Citing articles via
MAGMATOLOGICAL TECTONICS: ALFRED RITTMANN’S PARADIGM
DANIELE MUSUMECI, STEFANO BRANCA, LUIGI INGALISO
MORE THAN JUST A ROCK COLLECTION. THE METEORITE COLLECTION OF THE ITALIAN GEOLOGIST TEODORO MONTICELLI (1759–1845)
ANNARITA FRANZA, CARMELA PETTI, GIOVANNI PRATESI
TRANSFORMING THE CHARACTER OF THE UPPER MISSISSIPPI RIVER