The Bay Point Formation (Hertlein and Grant, 1939) is widespread and well exposed in the area adjacent to the present-day coastline. It is composed mostly of marine and nonmarine, poorly consolidated, fine- and medium-grained, pale brown, foss iliferous sandstone. The fossils found occur between 0 and 30 m above mean high tide and include mollusks, Foraminifera, and os tracods. These together indicate a brackish water estuarine depositional environment and a late Pleistocene (Sangamon) age (Kern, 1971).
The marine part of the Bay Point Formation interfingers with unfossiliferous sandstone that lies generally more than 30 m but less than 40 m above has been reported to attain a sea level. This part of the Bay Point Formation is considered to be nonmarine slope wash.
The Bay Point Formation is considered the old paralic deposits (late to middle Pleistocene) that rest on the 22-23 m Nestor terrace — Mostly poorly sorted, moderately permeable, reddish-brown, interfingered strandline, beach, estuarine and colluvial deposits composed of siltstone, sandstone and conglomerate.

Source - Geology of the eastern San Diego metropolitan area, California (Del Mar, La Jolla, Point Loma, La Mesa, Poway, and SW 1/4 Escondido quadrangles), 1975, California Div. Mines and Geol. Bull. 200, Section A, by Michael P. Kennedy

Bay Point Formation fossil shell layer at Torrey Pines State Natural Reserve. These shells have been dated at 120 thousand years old. Source Torrey Pines State Natural Reserve	Partial lower jaw of a mammoth with a molar and unerupted molar visible on the left. This specimen is from the Middle Pleistocene Bay Point Formation in Point Loma and is approximately 220,000 years old. Source SDNHM: Fossil Mysteries
The scenic badlands of Torrey Pines State Natural Reserve is an example of the Bay Point Formation.

References

Hertlein, L.G., and Grant, U.S., IV, 1939, Geology and oil possibilities of southwestern San Diego County: California Jour. Mines and Geol., v. 35, p. 57-78.
Kern, J.P., 1971, Paleoenvironmental analysis of a late Pleistocene estuary in southern California: Journal Paleo., V. 45, p. 810-823.5