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Ore - Wikipedia An ore is an occurrence of rock or sediment that contains sufficient minerals with economically important elements, typically metals, that can be ... CaliforniaPrehistory -- Articles on . A website dedicated to California prehistory, including news of the profession as well as research papers and other information. FAQ's - First Transcontinental Railroad Frequently asked questions about the transcontinental railroad. Central Pacific Railroad Photographic History Museum.    Read More

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