The pictorial sketch-book of Pennsylvania : or, its scenery, internal improvements, resources, and agriculture, popularly described . fig. 25. fig. 26. the sides to pressure, upon which the curved appearance indicatedin fig. 26 was the result. It is thus that, by the chemical opera-tions within the interior of the earth, the strata have been contortedand thrown into every imaginable shape and position, while theunstratified rocks have, at the same time, been heaved up, and13 T 146 OFF-HAND SKETCHES. thrown around in irregular shapes and quantities. The unstratified,which are the oldest of all
The pictorial sketch-book of Pennsylvania : or, its scenery, internal improvements, resources, and agriculture, popularly described . fig. 25. fig. 26. the sides to pressure, upon which the curved appearance indicatedin fig. 26 was the result. It is thus that, by the chemical opera-tions within the interior of the earth, the strata have been contortedand thrown into every imaginable shape and position, while theunstratified rocks have, at the same time, been heaved up, and13 T 146 OFF-HAND SKETCHES. thrown around in irregular shapes and quantities. The unstratified,which are the oldest of all rocks, differ from the sedimentary prin-cipally in having no lines or parallel markings; but present a shape-less and irregular mass of mineral matter, similar to fig. 27. But
Size: 1438px × 1738px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade, booksubjectminesandmineralresources
