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Measuring 235 feet (72 m) tall, [3] Haystack Rock is composed of basalt and was formed by lava flows emanating from the Blue Mountains and Columbia basin about 15-17 million years ago. [5] The lava flows came from massive eruptions from a source believed to be what is now the Yellowstone volcanic hotspot, and created many of the Oregon coast's ...
Oregon's oldest known rock formations are found in the Blue Mountains and the Klamath Mountains. [2] [3] The state's oldest individual rock is a limestone near Suplee dated to nearly 400 million years ago, during the Devonian period of the Paleozoic era.
Landforms near the cape include beaches, bluffs, and reefs. Visible to the south are Needle Rock, Blanco Reef, and Humbug Mountain. To the north are Gull Rock, Castle Rock, and Blacklock Point. [3] Blanco Reef is a group of irregular rocks and ledges that are from 2 to 5 miles (3 to 8 km) offshore and are up to 149 feet (45 m) high. [7]
In 1986, California named benitoite as its state gemstone, a form of the mineral barium titanium silicate that is unique to the Golden State and only found in gem quality in San Benito County. [ 80 ] ^ Colorado is the only state whose geological symbols reflect the national flag's colors: red (rhodochrosite), white (yule marble), and blue ...
Cannon Beach is a city in Clatsop County, Oregon, United States. Its population was 1,690 at the 2010 census . It is a popular coastal Oregon tourist destination, famous for Haystack Rock , a 235 ft (72 m) sea stack that juts out along the coast. [ 6 ]
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Orford Reef is a reef located off Cape Blanco on the southern coast of Oregon in the United States. The reef is situated around eight small rock islands: Best Rock, Long Brown Rock, Unnamed Rock, Square White Rock, Seal Rock, Conical White Rock, West Conical Rock, and Arch Rock. [1] [2]
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