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by shagie
463 days ago
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When you're driving through North Dakota and see the red clinker in the cliffs along the highway... https://www.dmr.nd.gov/ndgs/ndnotes/ndn13_h.htm and https://www.dmr.nd.gov/ndgs/documents/newsletter/2013Winter/... > Several early explorers reported coal fires in the northern Great Plains region. Over the years, range fires have ignited lignite beds many times. In two places in western North Dakota, in Theodore Roosevelt National Park and near Amidon, lignite seams were recently burning for many years. A seam of lignite at Buck Hill in the park burned from 1951-1977. And that's the modern history. > Years ago, during fieldwork on the major buttes of western North Dakota, John Hoganson and I discovered clinker pebbles in the Arikaree Formation indicating that coals had been burning prior to when these rocks were deposited some 25 million years ago. Probably as far back as 40 million years ago, when grasslands were first established, fires have swept across the plains of North Dakota igniting coal seams. |
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