Mulholland Formation

It overlies the Bald Peak Basalt formation, and underlies the Pleistocene epoch Leona Rhyolite formation.^[1] It is composed of siltstone, sandstone, and conglomerates. It has fluviatile and lacustrine deposits.^[1]

Descending under the Bald Peak Basalt formation are the Pliocene epoch units of the Siesta Formation, Moraga Formation, and Orinda Formation.^[1] Below the Orinda are the local Miocene epoch units of the Monterey Formation Group: Tice Shale, Oursan Sandstone, Claremont Shale, and Sobrante Sandstone.^[1]

The Mulholland Formation preserves fossils dating back to the Neogene period.^[2]

• Units of other local formations in the Berkeley and San Leandro Hills, in descending geologic column order from higher/younger to lower/older, include:^[1]

• Local Late/Upper Cretaceous−Pliocene units of the Chico Formation:

• Redwood Canyon Formation — sandstone, shale, and conglomerate.
• Shephard Creek Formation — shale and sandstone.
• Oakland Conglomerate — conglomerate, exposed on Skyline Boulevard.
• Joaquin Miller Formation — sandstone, shale, and conglomerate.
• Knoxville Conglomerate

• Pliocene geology in California
• List of fossiliferous stratigraphic units in California
• Paleontology in California