Mike and I have fallen in love with the Oregon coast and the Samuel H. Boardman State Scenic Corridor is one of the most rugged sections of the coastline. The particular geology of this coastline creates the sheer cliffs, sea stacks, and natural arches. Eons of erosion from winds and waves grinds down the rocks and forms these beautiful features. The natural arches, as seen here at Natural Bridges Viewpoint, form from cracks and crevices weakening and cracking off to form notches.
These notches grow into sea caves in the cliffs, and they sometimes collapse to form blowholes. After thousands of years, only the strongest parts of the rock remain. At Natural Bridges Viewpoint you will see the strong and resistant rock arches have outlasted the rock of the cove, which may have been a blowhole at one time.
Over eons the cove was continually weakened by rain, waves, and wind, leaving what is seen today. Over several thousand more years these natural arches may collapse, it may even happen in our lifetime. These geological forces are always occurring, changing the Oregon coast constantly little by little.
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