The physical geography of New York state . FIG. 63. Nearly boulder-free moraine in Pennsylvania (Lewis). the moraine forms a very striking feature of the land-scape. This is particularly true of many parts of theso-called terminal moraine of the Second Glacial 1 Since this was first written studies by tlir author in the Adirondacks haveverified this statement of probability. 2Chambcrlin, M Annual Kept. U. S. Geol. Survey, 1883, 291. 120 The Physical Geography of New York State Among some of the moraines of recession to the north ofthis, as well as in the earlier Pennsylvania moraine to
The physical geography of New York state . FIG. 63. Nearly boulder-free moraine in Pennsylvania (Lewis). the moraine forms a very striking feature of the land-scape. This is particularly true of many parts of theso-called terminal moraine of the Second Glacial 1 Since this was first written studies by tlir author in the Adirondacks haveverified this statement of probability. 2Chambcrlin, M Annual Kept. U. S. Geol. Survey, 1883, 291. 120 The Physical Geography of New York State Among some of the moraines of recession to the north ofthis, as well as in the earlier Pennsylvania moraine to thesouth of it, the morainic topography is often stronglydeveloped. A terminal moraine is essentially complex, and thisapplies to both form and structure. In form, or topo-graphic detail, it is typically a system of hummocky knolls,. FIG. 64. Lake in kettle holes in moraine of Colorado Rockies (photograph by Jackson, Denver, Colorado). with intermediate valleys, often saucer- and kettle-shaped,forming distinct closed basins. The hummocks may reachto the dignity of good-sized hills, perhaps 200 or 300 feethigh, though commonly not more than half this. Theirform is often quite circular, sometimes elliptical, and againridge-like. The hummocky hills are put together in sucha confused manner that there seems to be no order what-soever, the form being, on a much larger scale, somewhatthe same as that produced when many loads of sand aredumped near together without any attempt at order. Someof the hummocks are steep, others gently sloping, somesymmetrical, and others distinctly unsymmetrical. Iknow of no type of topography which closely simulatesthat of the moraine with the exception of the wind-blownsand deposits in a sand-dune region. In such places,judging from the form alone, one might often imagine Influence of tin
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