Geology
The bed of Snowy River is covered with bright white calcite. Over time, ancient, slow moving ground water dissolved the limestone walls of the cave and, with the help of microorganisms, recrystallized limestone into the white-colored mineral. Since prehistoric times, ground water saturated with dissolved calcite has periodically flooded the cave, followed by extended periods of dryness, leaving behind coatings and deposits.
The Bureau of Land Management reports that Snowy River may be the largest continuous cave formation in America.
Read more about this topic: Snowy River Cave