where is morro bay california
Geologically, Morro Rock, located in San Luis Obispo County, in the town of Morro Bay, California, is one of 13 volcanic, intrusive units that form volcanic plugs (remnant volcanic necks of volcanoes), lava domes, and sheetlike intrusions from Morro Rock southeast 29 km or 18 mi to Islay Hill.orro Rock is the best known of the Nine Sisters of San Luis Obispo County, a series of ancient volcanic plugs that line the Los Osos Valley between the cities of Morro Bay and San Luis Obispo.