During the prehistoric periods, California was covered by a warm shallow sea. This sea was mostly inhabited by various marine invertebrates, for instance, corals and brachiopods. Later on especially during the perminian periods, California began to exhibit a variety of habitats. This was characterized by both deep and shallow marine deposits. Swamps and estuaries would also be found in some parts of the land. California could also be described as a region of geologic upheaval which included volcanism and the formation of mountains. The local flora involved plants like ginkgoes and conifers.
The land during this time was also home to various creatures including horses, mastordonts, oreodonts, horses and camels. The ground