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Precambrian fossils are present but rare in California. [2] During the early Paleozoic, California was covered by a warm shallow sea inhabited by marine invertebrates such as ammonites, brachiopods, and corals. [2] At least two different genera of trilobites lived in San Bernardino County during the Early Cambrian. [3]
The Marble Mountains Fossil Beds are the site of 550-million-year-old fossils of trilobites, which were among the first animals on earth with eyes and skeletons. In all, roughly 21 species of Cambrian invertebrates have been discovered in the area. [ 4 ]
Older fossils lay even deeper beneath the bone bed. These 8.9-million-year-old rocks included fossilized bones of fish and marine mammals. Experts also found teeth from juvenile megalodons and ...
The Barstow Formation is a series of limestones, conglomerates, sandstones, siltstones and shales exposed in the Mojave Desert near Barstow in San Bernardino County, California. [1] [2] It is of the early to middle Miocene epoch, (19.3 - 13.4 million years ago) in age, in the Neogene Period. [3]
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Ranger Greg Francek found a trove of fossilized animals and petrified trees more than 5 million years old in an area east of Oakland, California.
Millions of prehistoric marine fossils were discovered beneath a California high school over the course of a multi-year construction project. The relics recovered at San Pedro High School included ...
The Chatsworth Formation is a Cretaceous period sandstone geologic formation in the Simi Hills and western Santa Susana Mountains of southern California. [1] [2] It is found in western Los Angeles County and eastern Ventura County. The formation's thickness can be more than 610 metres (2,000 ft). [3]