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| Ape Cave Lava Tube, Mt. St. Helens |
No, I'm not really rockhounding here - I'm exploring this remarkable two-mile-long lava tube on the southern slope of Mt. St. Helens. Lava tubes are rare here in the Northwest, where the Cascade volcanoes tend to blow up, rather than extrude a lot of liquid lava. Still, this is one of the finest lava tubes in the US, a near-perfect tunnel that you could nearly drive a bus through.
Very cool.
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