Rivers of Molten Rock
Lava began spewing from deep cracks
in the earth some 2,000 years ago.
Rivers of molten, red hot rock crawled
northward 16 miles, covering the
floor of Hat Creek Valley.
While the top crust cooled and
hardened, rivers of red-hot lava
insulated by the newly formed
rock above, continued to flow.
Eventually, the lava drained away,
leaving tube-like caves. Subway
Cave is the largest accessible tube
in the flow....