アメリカ内務省のインスタグラム(usinterior) - 11月9日 01時21分

Over 1.25 million years ago, a massive volcanic eruption created a 13-mile wide dimple in northern #NewMexico. Hot springs, fumaroles and Redondo Peak, a 11,00-foot tall lava dome, reveal the caldera’s geologic past. Most of the area is now part of #VallesCaldera National Preserve. Native Americans in the area used volcanic obsidian for arrowheads and spear points, starting a hunting tradition that lives on in the park today. Photo @vallescaldera by Andrew Gordon (www.sharetheexperience.org). #FindYourPark #usinterior

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