Mineral resources . of the lode, the massive sandstones under-lying the lode were observed to be strongly crumpled and puckered, but at aconsiderable distance along the crosscut the sandstones were found to alter-nate with black slates. Nevertheless, the apparent bedding planes of thesandstones were observed to be strongly inclined to the plane of contact ofsandstones with slates. The slates were highly cleaved, but their beddingplanes were obviously parallel to their planes of contact with the apparent bedding of the sandstones was thus seen to be only a false orcross-bedding.
Mineral resources . of the lode, the massive sandstones under-lying the lode were observed to be strongly crumpled and puckered, but at aconsiderable distance along the crosscut the sandstones were found to alter-nate with black slates. Nevertheless, the apparent bedding planes of thesandstones were observed to be strongly inclined to the plane of contact ofsandstones with slates. The slates were highly cleaved, but their beddingplanes were obviously parallel to their planes of contact with the apparent bedding of the sandstones was thus seen to be only a false orcross-bedding. This feature is well illustrated in the sketch sectionshown on page 75. The finest puckering of the cross-bedded sand-stones was obscured from 500 to 700 feet west of the shaft. Owing to thekindness of the management large specimens illustrative of these structureswere secured, which may now be seen in the Mining Museum at Millers-Point, the Technical College of Sydney, and the various State Universities- Plate Puckering of Cross-bedding Planes in Sandstone, Mount Boppy Crosscut, No. 3 Level, 500 feet in crosscut. Plate XXII.
Size: 1363px × 1833px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectminesandmineralresou
