Exploratory Shaft at Fairfax Station

Excavations of an 18 ft. by 36 ft. shaft extended from the surface to 75 ft. down in order to determine the characteristics of the asphalt-rich sediments at depth to assist in planning and executing the construction of the subway station for the Purple Line Extension. Over 500 fossils were recovered. All except one of the fossils recovered came from the near-shore marine San Pedro Formation. The majority of fossils recovered were invertebrates, primarily clams, snails and tusk shells. Vertebrate remains were rare and consisted of ray teeth, a large marine mammal rib fragment, and a terrestrial mammal pelvis fragment. Some of the most unique fossils recovered were the plants. The presence of Monterey cypress, Monterey Pine, and Torrey pine allows for a climactic interpretation of the area. Invertebrates recovered included cniderians, annelid worm tubes, barnacles, crabs, snails, bivalves, tusk shells, sand dollars and bryozoans.