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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 ]
The Delmar Formation is a geologic formation best exposed in seashore cliffs at Del Mar and Solana Beach in California, overlayed by Torrey Sandstone. [1] The formation rocks comprise the barrier bar [1] for Los Peñasquitos Lagoon [2] and have three sub-facies that can be classified as ancient oyster reefs (Ostrea idrianensis), tidal flats and sublittoral channels and ponds [1] The formation ...
The Santa Margarita Formation is a Neogene Period geologic formation in the San Joaquin Valley of central California. It preserves fossils dating back to the Miocene epoch . See also
Toggle the table of contents. ... Location; Region: California: ... The Ono Formation is a geologic formation in California. It preserves fossils dating back to the ...
Vertebrate fossils in the Franciscan are extremely rare, but include three Mesozoic marine reptiles that are shown in the table below. [21] Again, these indicate an open-water, and therefore deep-marine setting. Although rare, a few shallow-marine fossils have been found as well, and include extinct oysters (Inoceramus) and clams (Buchia). [20]
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]
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This geologic formation was initially described in 1921 by paleontologist Childs Frick, [3] who considered the San Timoteo Badlands to be split into three lithologic parts: (1) the Potrero Creek deposits, (2) the San Timoteo Formation, and (3) the Eden beds. [4]