Abstract

Much work on nodular sulfate rocks has shown that they are formed by penecontemporaneous growth of gypsum and anhydrite often with a complex early diagenetic relationship within the host sediment, resulting in a wide variety of textures. The penemosaic structures noted by Rooney and French (ibid., v. 38, p. 755-765, 1968) were formed by such a process rather than by wave action and density settling.

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