Flaser bedding commonly occurs in association with lenticular and wavy bedding. All three sedimentary structures and their interrelationships are hence discussed in this section.
Definitions
Quoting Reineck and Wunderlich (1968), the Glossary of Geology (Bates and Jackson, 1987, 3rd edn.) defines the term “flaser structure” as “ripple cross-lamination in which mud streaks are preserved in the troughs but incompletely or not at all on the crests” (p. 246). The term “lenticular bedding” is defined as “a form of interbedded mud and ripple cross-laminated sand, in which the ripples or lenses are discontinuous not only in the vertical but also more or less in the horizontal direction” (p. 376), and the term “wavy bedding” as “a form of interbedded mud and ripple-cross-laminated sand, in which the mud layers overlie ripple crests and more or less fill the ripple troughs, so that the surface of the mud layer only slightly follows the concave or convex curvature of the underlying ripples (p....
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Bibliography
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© 1978 Dowden, Hutchinson & Ross, Inc.
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Flemming, B.W. (1978). Flaser. In: Middleton, G.V., Church, M.J., Coniglio, M., Hardie, L.A., Longstaffe, F.J. (eds) Encyclopedia of Sediments and Sedimentary Rocks. Encyclopedia of Earth Sciences Series. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-3609-5_86
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