The cave's rough volcanic walls curve to a fractured ceiling with dangling tree roots 10 feet above the sandy bottom, the ground littered with fallen, dinner table ... rock flow inside stops ...

“This is where the softer sediment is eroding from Lower Table Rock. It’s a really unique land form that’s so different from anything else around Southern Oregon.” ...

the lava tube drains of molten rock leaving a cave tunnel behind," the NPS adds. There are believed to be as many as 400 lava tubes in central Oregon, many of which are on public lands ...

“This is where the softer sediment is eroding from Lower Table Rock. It’s a really unique landform that’s so different from anything else around Southern Oregon.” Seven million years ...

said the field trip to Cascadia Cave is a chance to show festivalgoers a unique part of Oregon. ?(For) a lot of people, it’s the only time in their lives they’ll see rock art,” he said.

Courtesy of Matt Hill / Lone Rock Strategies via Underscore ... of privately owned land adjacent to the Table Rocks preserve, just north of Medford, Oregon. “It’s the most historic piece ...