Basal conglomerate of the upper Miocene Calabasas Formation. Pebbles and cobbles in the conglomerate consist of sandstone (S) and mudstone (M) fragments eroded from the underlying Chatsworth Formation and quartzite (Q), granite (G), basalt (B), and other rock types eroded and reworked from conglomerate beds in the Chatsworth Formation and other older rock units.
| |
Go to the next photo.
| Return to the GeoTrek IV-A page. | |