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The
Lower Locks of the Pawtucket Canal at Lowell NHP |
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June 5 |
| 1965 Located on the Niobrara River in northwestern Nebraska, the Agate Fossil Beds and its surrounding prairie are established as a 3,000-acre National Monument. Once part of "Captain" James H. Cook's Agate Springs Ranch, the nearby beds are an important source for 19.2 million year-old Miocene epoch mammal fossils. Cook's ranch also became a gathering place for Chief Red Cloud and other Oglala Lakota (Sioux) Indian people. 1978 |
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