Thirteen peaks within the San Jacinto Mountains rise above the 10,000-foot level, including Jean Peak (10,570 feet), Miller Peak (10,400 feet) and Marion Mountain (10,362 feet).

Geology: Aftermath of a Cataclysm. 3 minute read. TIME. May 12, 1967 12:00 AM GMT-4. Nine times in the past 4,000,000 years or so, the earth’s magnetic field has completely reversed.

The Earth's crust comprises complex environments and geology; mountains, rivers, lakes, deserts and oceans. However, what we can see on the surface is only a small part of what makes up our planet ...