Agate Fossil Beds National Monument

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Volcanic Ash, Tephra Fall, and Fallout Deposits

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Volcanic ash, pumice, and tephra ejected in volcanic eruptions ultimately falls back to Earth where it covers the ground. These deposits may be the thin dustings or may be many tens of feet (meters) thick near an eruptive vent. Volcanic ash and tephra can present geohazards that are present great di

Updated Species Database Will Help Boost Amphibian Conservation Across the National Park Service

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Project Profile: Manage Invasive Plants in Northern Great Plains

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Agate Fossil Beds: The Geology Behind Nebraska's Miocene Bonebeds

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Managing Invasive Grasses at Northern Great Plains Parks

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