The book Report On Governmental Maps for Use in Schools; was written by author Davis, William Morris, 1850-1934 Here you can read free online of Report On Governmental Maps for Use in Schools; book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Report On Governmental Maps for Use in Schools; a good or bad book?
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Between the sandstone mountain ridges lie longi- tudinal valleys of greater or less breadth, eroded on weaker shales and limestones, and sometimes containing coal, which is 28 Governmental maps for use in schools extensively mined at Pottsville, Port Carbon, etc. All the settlements are in the valleys and valley lowlands, except occasional mining towns on the ridges. The course of roads is sharply defined by the course of the narrow valleys. The ridges are as a rule forested. The inner longitud...inal valleys are drained by transverse valleys or watergaps (the gaps of the Susquehanna, Harris- burg sheet ; Manada, Indiantown, Swatara gaps, Hummels- town sheet). The even crests of the ridges are thus explained : The ancient crushing by which the folded mountain structure was produced, uplifted the surface of that remote time to a moun- tainous altitude. Since then the region has been greatly denuded and reduced even to a lowland of faint relief. The lowland was then evenly uplifted with a gentle inclination to the southeast ; and all its streams, thereby revived, proceeded again to deepen their valleys toward the new sea-level.
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