Forest physiography; physiography of the United States and principles of soils in relation to forestry . ct The northern district of the Newer Appalachians consists of a numberof well-defined valleys and ridges whose structural features are morecomplex than those of the central district. The topography is notcapable of an analysis as simple as in the case of either the Pennsyl-vania zigzags or the ridges and valleys of the Chattanooga district;the ridges and valleys are here less regular both in general and in respect of border features the northern district is unlike either of theot
Forest physiography; physiography of the United States and principles of soils in relation to forestry . ct The northern district of the Newer Appalachians consists of a numberof well-defined valleys and ridges whose structural features are morecomplex than those of the central district. The topography is notcapable of an analysis as simple as in the case of either the Pennsyl-vania zigzags or the ridges and valleys of the Chattanooga district;the ridges and valleys are here less regular both in general and in respect of border features the northern district is unlike either of theother districts of the Newer Appalachians. On the west the province isterminated not by a single plateau but by an outlier of the great Lauren- For an excellent description of the features of northern Pennsylvania and New Jerseywith respect to drainage, see Davis and Wood, The Geographic Development of North-ern New Jersey, Boston Soc. Nat. Hist. Proc, vol. 24, i8go, pp. 365-423, and W. M. Davis,The Rivers and Valleys of Pennsylvania, Nat. Geog. Mag., vol. i, 1889, pp. 183-253. 68o FOREST PHYSIOGRAPHY. NEWER APPALACHIANS 681 tian area of Canada, the Adirondacks, and by an exceptionally high andrugged portion of the Appalachian Plateaus, the Catskill northern district of the Newer Appalachians is also unlike theother districts in that the mountains upon its eastern border consistpartly of metamorphosed rock, the schists of the Taconic and MoimtGreylock ranges. The Newer Appalachians have a very restricted development innorthwestern New Jersey, but shortly after entering New York stateand specifically in the Walkill and Middle Hudson valleys the HudsonRiver shales thicken greatly and the whole belt has a notably broaderdevelopment. Between the Highlands of the Hudson and the Catskillsa broad valley lowland has been formed which continues northwardalong the eastern border of the state to a point between Hudson andRenssela-er, where the southern outliers of the Taconic
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectforestsandforestry
