California was created by a very complex geological
evolution. It has all three types of rocks, igneous, sedimentary, and
metamorphic, in different combinations all around the state. Many of
these rocks are mined, either to extract their mineral wealth, or as
ingredients of building materials. On the map of California you can see
the areas and the overall rocks of these areas.
On the map provide in your worksheet, California
is divided into time areas. Quaternary is up to 10 thousand years ago;
Tertiary is up to 65 million years ago; Mesozoic is up to 225 million
years ago; Paleozoic is up to 600 million years ago; and Pre-Cambrian is
anything older than Paleozoic. The state can also be divided into
geomorphic provinces, which refer to areas that have a similar
landscape, representing different types of rocks.