San Diego Spanish Bight, hard layer fossiliferous Pleistocene forms beach at foot of bluff. Pacific Beach, slightly tilted San Diego Pliocene sandstone capped by horizontal upper San Pedro gravels. San Diego formation rests on massive gravels and conglomerates at Pacific Beach. Here San Diego has a Pecten expansus and a Opalia varicostata horizon. Foot of 26th st., upper San Pedro formation in lower half of bluff, with Anomia limatula horizon at base and forming low reef on beach. Pliocene, 2 faunal horizons, but one stratigraphic unit.
((I have asked Shi-Kuei Wu to go over this list of taxa and he has made some corrections which I have included if they pertain to spelling. If the taxon has changed because of later revisions, corrections, or synonomies that is noted after the original reference.))
Mollusca Cowries. Cypraea spadicea- brown cowry Erato vitellina, 1/2 in., heavy, smooth, aperture toothed Erato columbella, much smaller, delicate Ovula deflexa, slender- var. barbareuse
{added:} Trivia dolandri, large coffee bean with dorsal caudal in californica, small, no caudal
