Stadium Conglomerate

The Stadium Conglomerate is a geologic formation in San Diego County, California. It is found at the northern end of Mission Valley near San Diego Stadium.

Geology
The formation consists of a massive cobble conglomerate with a dark yellowish-brown coarse-grained sandstone matrix. The conglomerate has dispersed lenses of fossiliferous crossbedded sandstone.

It overlies the Friars Formation, and underlies the sandstone Mission Valley Formation.

Fossil content
It preserves fossils dating back to the Eocene epoch of the Paleogene period, during the Cenozoic Era. The fossils include calcareous nanoplankton.