| OCR Text |
Show 178 Section 12. This section is located - Duma Point #2 approximately 750 m east of Duma Point section #1 (UTM coordinates 0588841E, 4292686N; SE 114 NW 114 and NE T. 23 S., R. 18 E., Grand Duma Point area, and a County, Utah). second section variations in the Tidwell Member over 114 SW 114 The Tidwell Member is well was measured here to relatively sec. in the exposed identify potential 30, lateral short distances. The section is measured from the upper Summerville Formation to the basal Salt Wash Member of the Morrison Formation (Figure 50). The upper Summerville Formation shows a weak to moderate reaction with HCL and may stain red (calcite and dolomite cement). Morrison Formation sediments measurements from Bed A column calcareous (Table 7) are (calcite-cemented). Twenty paleocurrent plotted on diagram a rose on the stratigraphic (Figure 50). Morrison Formation (part): Salt Wash Member 10. are Ledge to Thickness (m) (part): cliff-forming unit. Gray medium- to coarse-grained or pebbly bedding with trough cross-beds and pebble sandstone. Medium to thick lags. Vertical to horizontal trace fossils occurring as float. Calcite cement. Total measured thickness (incomplete), are common in boulders 2.0 . Salt Wash Member 2.0 Tidwell Member: 9. Slope-forming unit is mostly covered. Uppermost 2 to 3 m may protected by the overlying Salt Wash Member cliff. Purple to gray calcareous mudstone and siltstone. Thin lenses of sandy Unit 4. crop out where siltstone and limestone 8. are common. Mudstone facies. . 5.4 . Unit 3. Unit may form a thin, discontinuous ledge. White to gray very fine-grained sandstone weathers tan to brown. Bedding is not apparent. Calcite cement. Thin-bedded sandstone facies. . . 0.35 |
