Basic subsurface geology of the south-central Sacramento Valley
Conference
·
· Am. Assoc. Pet. Geol., Soc. Eng. Geol., Pac. Sect., Annu. Meet., Tech. Program Prepr.; (United States)
OSTI ID:6603077
The generalized east-west cross section of the south-central Sacramento Valley shows the subsurface geology underlying the 27 miles long Interstate Highway 5 and State Highway 16 from the Yuba City turnoff I-5 to Esparto on Highway 16. The uppermost 2,000 to 3,000 ft of section consists of the Mid-Miocene Valley Springs, Upper Miocene Mehrten and Pliocene Upper Mehrten, and Tehama and the Pleistocene Red Bluff gravels. These formations are not differentiated on the section. A westward thickening wedge of Upper Cretaceous to Oligocene marine units underlies the continental deposits. Basement complexes are Sierran on the east and Coast Range on the west. The boundary between these basement assemblages probably underlies the area just to the east of Woodland. The east-west portion of I-5 parallels a break in the geology of the Sacramento Valley. To the north, the Martinez, H and T, Starkey sands, and Winters Formation are soon truncated by the unconformity at the base of the Capay Shale. These units are important gas reservoirs adjacent to the south of the highway. To the north, most production is from the Cretaceous F Zone.
- Research Organization:
- Tri Valley Oil and Gas Co
- OSTI ID:
- 6603077
- Report Number(s):
- CONF-7804201-
- Conference Information:
- Journal Name: Am. Assoc. Pet. Geol., Soc. Eng. Geol., Pac. Sect., Annu. Meet., Tech. Program Prepr.; (United States)
- Country of Publication:
- United States
- Language:
- English
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