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Landmark: Earth
Coconino County Landmarks
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Lowell Observatory is among the oldest observatories in the United States. It was founded in 1894 by astronomer Percival Lowell, and the Observatory's original 24-inch (0.61 m) Alvan Clark Telescope is still in use today for public education.
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SP Crater is a cinder cone volcano. The base of the cone is 3,900 feet (1,200 m) across and 820 feet (250 m) tall. It has a lava flow that extends for four miles to the north.
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Sunset Crater was named for its brilliantly colored scoria deposits mantling the cone. Having erupted sometime between 1080 and 1150 AD, it is the youngest of the more than 550 vents of the vast San Francisco volcanic field.
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