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Books Books 1 - 1 of 1 on ... each converge with different ridges in the opposite direction, there will result....
" ... each converge with different ridges in the opposite direction, there will result a continuous ridge looping back and forth, first in one direction, then in the other, the alternate reaches of which are roughly parallel. (Fig. 2.) To this type of ridge... "
Regional and Economic Geography of Pennsylvania: Physiography - Page 34
by Walter Sheldon Tower - 1906 - 69 pages
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The Bulletin of the Geographical Society of Philadelphia, Volume 4

Geography - 1907
...end of Kishicoquillis Valley, in Center County, on 14 Regional and Economic Geography of Pennsylvania Short, Brush and Nittany Mountains, in Center and...western end of the anthracite coal region (Map, Fig. i), where the ridge crests run west and loop back to the east successively, as Catawissa and Line,...
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