 Mount Shasta remains a focus of "New Age" attention.About 593,000 years ago, andesitic lavas erupted in what is now Mount Shasta's western flank near McBride Spring.Over time, an ancestral Mount Shasta stratovolcano was built to a large but unknown height; sometime between 300,000 and 360,000 years ago the entire north side of the volcano collapsed, creating an enormous landslide or debris avalanche,  in volume.