Title: Anza-Borrego Desert State Park - Wikipedia
Headings: Anza-Borrego Desert State Park
Anza-Borrego Desert State Park
Contents
Geography
Blair Valley
Visiting
Flora and fauna
Desert bighorn sheep
Climate
Geology and paleontology
Geology
Fossils
Marine period
Terrestrial period
Native Americans
Park interpretive associations
Gallery
See also
References
Specific
Further reading
External links

Content: The Anza-Borrego region gradually changed from a predominantly marine environment into a system of interrelated terrestrial habitats. North of the Colorado River Delta and intermittently fed by the river, a sequence of lakes and dry lakes has persisted for over three million years. At the same time, sediments eroded from the growing Santa Rosa Mountains and other Peninsular Ranges to spread east into the trough. These sediments provide an almost unbroken terrestrial fossil record, ending only a half million years ago. Here, the deposits of ancient streams and rivers trapped the remains of wildlife that inhabited a vast brushland savannah laced with riparian woodlands . Fossils
This record of changing environments and habitats includes over 550 types of fossil plants and animals, ranging from preserved microscopic plant pollen and algal spores to baleen whale bones and mammoth skeletons. Many of the species ar