Formation names that are highlighted in blue are linked to a more
detailed description of the formation. Unfortunately the stratigraphy
of the San Joaquin Valley is rather complicated, and it can be quite
confusing. The stratigraphy shown here is greatly simplified.
SJV Strat Section.xls
Lithostratigraphic Column
Below is Geologic Time Chart, but due to space considerations it is not
drawn to scale. However, the link below does lead to a more detailed
Time Chart that is specific to California.
California Geologic Time Scale
Geologic Time Chart