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About Twin Rocks

After millions of years of erosion, the twin sea stacks of Twin Rocks were connected at one point to form a single structure. Prior to 1925, the Twin Rocks were called the "Profile Rocks" until they changed names due to a conflict with another set of profile rocks in the region. If you look closely, you can see a sea dragon, Indian, princess or Lochness monster.The pinnacle is 88' high and the hole is 35' across. You can actually fly a helicopter between the two formations. When viewed from above, the rocks are in affect a narrow wedge-shape perched on top of a rocky island.
Did you ever wonder how the amazing Twin Rocks formation (and others like it along the Oregon coast) was created? According to George R. Priest, a geologist with Oregon Department of Geology and Mineral Industries coastal field office in Newport, Twin Rocks is composed of sandstone formed about 20-30 million years ago. At that time, the entire area, including what is now the Coast Range, was an under-sea marine environment and part of the continental shelf, just as the ocean floor off the coast is today.

Over time and under pressure, the sand in this sea bed consolidated into sandstone. Then, as the earth's tectonic plates crashed into each other, they pushed up the coastal mountains and fractured and tilted up a ridge of sandstone along the coastline. Over time, the tides and surf wore away the softer portions of this sandstone, leaving behind the massive rocks we see today.

If you'd like to know more about the geologic history of the Oregon Coast, Priest recommends the book Geology of Oregon by Elizabeth and William Orr, which can be found in most libraries around the state.
Adventurecation at the Ocean's Edge on the North Oregon Coast. We love Oregon Dreamers. The Peoples Coast.