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The Rock Creek Wilderness is a wilderness area comprising 7,486 acres (3,029 ha) within the Siuslaw National Forest on the Oregon Coast. It was created in 1984, along with the Drift Creek Wilderness and Cummins Creek Wilderness . [ 1 ]
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]
Southward view from Ecola State Park, Northern Oregon Coast Map of the Oregon Coast. The Oregon Coast is a coastal region of the U.S. state of Oregon.It is bordered by the Pacific Ocean to its west and the Oregon Coast Range to the east, and stretches approximately 362 miles (583 km) from the California state border in the south to the Columbia River in the north.
The underlying rock of the Central Coast Range are the igneous rocks from the Siletz River Volcanics of the Paleocene age. [3] It is estimated that this rock formation is up to 16 miles (26 km) thick. [3] These formations consist mainly of pillow basalt, large lava flows, tuff breccia, and sills. [3]
Fig. 1. Map of Heceta Bank. Heceta Bank is a rocky bank located 55 kilometers (km) off the Oregon coast near Florence, centered on approximately 44°N, 125°W, and is roughly 29 km long and upwards of 13 km wide. [1] [2] Heceta Bank is an area of ecological and oceanographic importance.
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The Oregon Coast National Wildlife Refuge Complex consists of six National Wildlife Refuges along the Oregon Coast. It provides wilderness protection to thousands of small islands, rocks, reefs , headlands , marshes , and bays totaling 371 acres (150 ha) spanning 320 miles (515 km) of Oregon 's coastline. [ 1 ]