evohr.org > trips > Lassen > Subway Cave

« previous | next » 2 of 12
 
...
The Formation of a Lava Tube
Cross Section View

  1. Cross section view of small area of Hat Creek Valley. (Valley floor has variations in height.)

  2. Lava flows from fissure vents into Hat Creek Valley. (As the hot molten lava flows into the valley, it flows in and around the land.)
...
 
© 2000-1, the evohrs