VIRTUAL TOUR OF NEHALEM BAY
Twin Rocks Up Close, Rockaway Beach
Here's one of the Twin Rocks up close - now
an arch after perhaps millions of years of oceanic wear and tear. Geologically
speaking, twin sea stacks like these were usually connected at one point,
and usually part of some larger basalt structure before that, which has
been worn away. There was likely enough erosion to make an arch out of
the larger structure, which eventually crumbled away to create two such
sea stacks.
One day, there will probably be three stacks when this arch crumbles.