Spilites and spilitic rocks: G.C. Amstutz et al. (Editors). (Int. Union Geol. Sci., Ser. A, 4), Springer,Berlin, 1974, 482 pp. DM. 66.00 |
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| Authors: | M Schidlowski |
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| Institution: | Mainz Germany |
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| Abstract: | A methodical gravel-fabric analysis has been made based upon the measurement of orientation and form of 3,300 pebbles. The study was carried out in glaciofluvial deposits in the Randers-Djursland area, Denmark.It is demonstrated that particles with axial ratios less than 0.8 are usable in gravel-fabric analysis and that shape does not essentially affect the orientation. The fabric pattern is found to be independent of particle size but an upper size limit exists above which the particles cannot obtain a preferred orientation. Further it is shown that a significant preferred orientation of the a/b planes occurs only when the particle dip is greater than about 20°. |
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