Shale
Shale, foliated, and bearing organic matter, from the interbeds between sandstone layers. Fine grained laminated sands between shales were uncollectible, but present. Friable and fragile.
Thin Section:
Very fine to fine grain, poorly sorted quartz, feldspar, and pyroxene varying from sub rounded to angular.
Oct., 11, 2013
Western Minerals, lnc.
FM-9
Shale
Organic rich to moderate black to light grey shale. Some parts of FM-4 are silty shale. Minor rust stains are present on lighter samples. Representative of upper portion of a turbidite sequence.
Thin Section
Very fine (<.1 mm) grains are present in this sample, along with staining bands. Note the fair sorting, this sample is better sorted than the others of this suite, but not as well sorted as a typical shale.
Oct., 11, 2013
Western Minerals, lnc.
FM-4