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The brand new seams otherwise pockets are known for their discontinuity (Julihn and you will Horton, 1940, p. 60). Possibly the basic significant possessions becoming created in which section are the fresh Harvard mine, discovered inside the 1850 (Julihn and Horton, 1940, p. 30). Another important number of mines, earliest operate from the 1860’s, is the brand new Golden Signal (Julihn and you may Horton, 1940, p.