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https://www.usgs.gov/media/images/sunset-crater-youngest-cinder-cone-san-francisco-volcanic-field-northern-arizona
Sunset Crater is the youngest cinder cone of the San Francisco Volcanic Field in Northern Arizona....
Eruptions between 1064 and 1067 AD produced three lava flows that covered 8 km2 (3 mi2) and a field of scoria and spatter that covers 2300 km2 (890 mi2)....
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https://www.nps.gov/sucr/getinvolved/workwithus.htm
Work With Us - Sunset Crater Volcano National Monument (U.S. National Park Service)
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https://www.nps.gov/sucr/learn/news/index.htm
News - Sunset Crater Volcano National Monument (U.S. National Park Service)
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https://www.nps.gov/sucr/planyourvisit/hikes-and-trails.htm
Hikes and Trails - Sunset Crater Volcano National Monument (U.S. National Park Service)
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