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Lava Rocks |
These smooth, shiny lava rocks were brought in from the Big Wood River below Magic Reservoir Dam (between Shoshone and Bellevue, Idaho). The volcanic basalt, originally sharp and abrasive, has been shaped and smoothed by flowing water and sand particles. The holes and depressions you see began as small air bubbles in the lava. Over time, these holes were enlarged by the erosive action of sand and water.
The petroglyphs (petro=stone, glyph=writing) you see here are replicas of those made by Native Americans many thousands of years ago.
