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Show 17 does not constitue separate rock type. a Nomenclature of system discussed in extremely coarse Appendix "A". Fine accordance with the classification or that of Folk The rock proposed. by Picard in this section are characteristics of the important variations exist in the discussion. are common grained rocks named in a.re (1971a., p. 185) 124). p. descriptions to show the most if (1968, grained rocks, adheres to the Detailed field found in the measured. a general and are given types. given unit, they are designed However, included in of all units observed descriptions sections, Appendix "B", and in the traverses, Appendix "C". SILTSTONE Siltstone comprises Mineral Fork Forma. tiono in bedding (see unf ts more than 21 percent of the volume of the Specific 2-18, 2-10 t non-bedded. and thin-bedded. siltstone a.nd types usually d,lffer only 2-31), and are divided into' types in the following discussion. Non-bedded Siltstone Volumetrically, the 1-1inera.l Fork percent of Formation, comprising only about the total volume of the formation. one half of one, Gradational relation that. non-bedded siltstone is either reworked froM the that it is tilloid Typical impo:rta.nce in most non-bedded siltstone units and tilloid ships between , non-bedded siltstone is of minor lacldng large non-bedded siltstone mation has the clasts as suggest tilloid, or (see figure 5). found in the Mineral Fork For following characteristics: J |
