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Imbricate refers to clastics sediments that are laid down with a preferential orientation of the composing grains.[1] This is most often applied to conglomerates and gravels. It is generally related to paleoflow direction.[2] Wadell[3] found the long axis aligned with paleocurrent, and dipping basinward in glacial sediments, whereas deltaic gravels may be oppositely inclined.[4]


  1. ^ Pettijohn, F. J., 1957, Sedimentary Rocks, Harper and Row, Second Edition p. 78
  2. ^ Becker, G.F., 1893, Finite homogenous strain, flow, and rupture of rock, Bull. Geol. Soc. of Amer., 4, pp. 13-90; cite in Pettijohn, 1957.
  3. ^ Wadell, H., 1936, Shape and position of rock fragments, Geografiska Annaler, pp. 74-92, cite in Pettijohh, 1957.
  4. ^ Krumbein, W. C., 1940, Flood gravel of San Gabriel Canyon, Bull. Geol. Soc. of Amer., vol. 51, pp. 636-676.
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Imbricated". A list of authors is available in Wikipedia.
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