Further evidence is given in support of the conclusions reached in the paper of the same title by Hoy, Foose, and O'Neill in the above journal, v. 46, no. 8, p. 1444-1459, 1962. The presence of intrusives, inferred by CO 2 blowouts at Winnfield, is supported by Kuhuhn's description of similar explosions in potash mines in Germany. In the Werra region intrusives can be seen penetrating the salt, the mining of which has reduced rock pressure. Kuhn believes that rinneite, found at Winnfield, is further evidence of intrusive relations, as is also erythrosiderite which crystallizes in brine poole on the mine floor.--G.D.C

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