The physical geography of New York state . rt 2, IMit, (ill-71. 2Uphiirn, 1roc. Host,,n Soc. \;it. Hist., XX. 1878-80; 220-234; XXIV, 1888-89,127-141 ; XXIV, 1888-8!), 228-212: rpham, Amer. Journ. Sci. Ser. Ill, XXXVII. 188!),:f.~i!l-:i7_>; Croshy and Pollard, Amer. Jourii. Sci. SIT. Ill, XLVIII. 1S!U. 1st, ,;Martmt and Wood wort li. Seventeenth Annual Kept. I. S. : rphain, AniiT. (ieol. XX. 3s3-.!s7. (ii-ol. Survey, \Vi-consin. I, 1873-7!). 28.:. •Kinahan and Close. (Jeneral (ilaciatimi of lar-(onnaiitrlil, Dublin, 1872. 148 The Physical Geography of New York Sta
The physical geography of New York state . rt 2, IMit, (ill-71. 2Uphiirn, 1roc. Host,,n Soc. \;it. Hist., XX. 1878-80; 220-234; XXIV, 1888-89,127-141 ; XXIV, 1888-8!), 228-212: rpham, Amer. Journ. Sci. Ser. Ill, XXXVII. 188!),:f.~i!l-:i7_>; Croshy and Pollard, Amer. Jourii. Sci. SIT. Ill, XLVIII. 1S!U. 1st, ,;Martmt and Wood wort li. Seventeenth Annual Kept. I. S. : rphain, AniiT. (ieol. XX. 3s3-.!s7. (ii-ol. Survey, \Vi-consin. I, 1873-7!). 28.:. •Kinahan and Close. (Jeneral (ilaciatimi of lar-(onnaiitrlil, Dublin, 1872. 148 The Physical Geography of New York State close to the northern end. Some ridges, perhaps three-quarters of a mile long, are not more than forty feet highat the highest point. In fact, these low druinlins simulatethe esker in form. Even many of the higher drumlins ofthis section change to low and long ridges in the southernpart, and their exact southern terminus is often incapableof location, for it flattens out into the undulating till sheet. Flu. 77. Low drumlin ridge iiear southern margin of New York drumlin area,just east of Cayuga (photograph by W. B. Greenlee). very gradually. Sometimes this terminus is in the irregularmorainic topography. In all cases the northern end iswell defined and relatively steep. While some of the drumlins are long and low, with aneven-topped crest line, sloping gradully southward, othershave an undulating crest, giving a very ragged sky this undulating crest is a part of the originalform of the drumlin, or whether it has been caused bylater denudation has not been determined, though there aresome reasons for supposing that the latter is true. Between the long and low type at the southern mar-gin of the belt, and the shorter type of the central partthere is a gradational form to which a student of CornellUniversity applied the descriptive name of tadpoledrumlin. The northern end of such a drumlin resemblesthe central type quite closely, while the southern end is a Influ
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