Fine Banded Sandstone
Very fine grained sandstone and silty shale noted between shale and dark, fine grained sandstone (sample 4 &5).
Thin Section:
Very fine sized sub rounded grains of pyroxene, quartz, and feldspar in a calcic matrix.
Oct., 11, 2013
Western Minerals, lnc.
FM-8
Calcareous Sandstone
Fine grained relatively soft calcareous sandstone.<br /><br /> Thin Section Fine angular grains with fairly close packing characterize this thin section, with unusually sharp angles. Sample is still clay dominated.
Oct., 11, 2013
Western Minerals, lnc.
FM-3
Conglomerate
Conglomerate, dominated by carbonate pebbles). Only a medium grained (1-10cm) facies collection of out of what was perhaps a 50ft exposure of coarse conglomerates. Light pink quartzite pebbles are interpreted to have been deposited during the Triassic. <br /><br />Poorly sorted mix of sedimentary and igneous clasts floating in a sand sized matrix of varying composition across the sample, with an argiliaceous smell and calcareous content in the cement Thin Section Small grains (1 mm) and small pebble sized granites cemented with mud dominate this thin section, with smaller, angular fragments present as well.
Oct., 11, 2013
Western Minerals, lnc.
FM-2
Fossiliferous Biofloatstone in a mud matrix
Fresh water marl with plant remains. Specimens selected to include leaf and or stem remains. Hand sample specimen is small and crumbly. <br /><br />Fossil bearing biofloatstone composed of soft silt, mud and limestone matrix, with carbon imprint and original material remains, mainly gastropods and plant remains. Both are visible in thin section, along with mineral evidence that the sediment was not transported very far. <br /><br />Thin Section XPL and PPL images exhibit phosphatized remains, clay particles, as well as some quartz and lithics are present.
Oct., 10, 2013
Western Minerals, lnc.
FM-1