Other terraces are visible at Fort Bragg in Mendocino County, at Duxbury Reef in Marin County, along the Santa Cruz coast, at Point Buchon in San Luis Obispo County and at Dana Point in Orange County. Submerged terraces to depths of 500 feet lie just offshore of the coast from Santa Barbara to San Diego. Less than 25,000 years old, these terraces are in the process of forming. Terrace soils are generally thin, commonly composed of rock debris, marine fossils fragments, and shells that were deposited on the once-submerged terrace. These marine sediments are often buried under thick alluvial deposits of sand and gravel from streams and rivers crossing the terraces after they emerged form the sea.
Grasses grow on many terraces.
In Northern California the terraces are covered by redwood and pine forests. On the Mendocino coast, a unique forest of pygmy cypress and pine trees has adapted to the sandy, nutrient-deficient soils on the upper marine terraces.