Abstract

Experimental evidence and studies of several naturally occurring minerals suggest that displacive growth of crystals by the force of crystallization occurs. Although displacive calcite has been frequently described and discussed, its implications have been largely ignored. Evidence of displacive micrite and fibrous spar in calcretes was found through the use of macromorphologic and micromorphologic features, fabrics, and textures. The implications of this expansive growth are important in the identification and interpretation of cements and neomorphic calcite. The recognition of displacive calcite provides evidence of supersaturated precipitating solutions that could be of use in detailed facies analyses and diagenetic studies.

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