INDEX 



119 



Map illustrating the recession, opp. 120; 

 explanation, 104 



Marine clays, 3 



Mascoma River, 29, 58 



Mather, W. W., vii 



Mathews, E. B., xii 



Measuring clay layers (ill.), opp. 5 



Merrimac Valley, 82; correspondences 

 of varve curves with Connecticut 

 and Hudson Valleys, 67; localities 

 studied, 23; map of localities 

 studied, 45; reliability of varves, 56 



Middletown, Conn., 52 



Mink Brook, N. H., 29 



Mohawk River, 46 



Mohawk Valley, 83, 95. 99. 100 



Montague City, Mass., brickyards, 18, 

 19 



Moraines, Berkshires, 92; Great Lakes 

 region, 96; sources of information, 

 105 



Narrows, the, 7 



National Research Council, xii 



Nevel's Brickyard, 12 



New England, abundance and quality 

 of material, 65; conditions during 

 deposition of the varve clay, 7; 

 southern, higher elevation in late 

 glacial time, 7 



New Haven, Conn., 7, 8 



New York (city) , 7 



New York (state), 95, 96 



Newbury, Vt., clay pits, 31 



Newington moraine, 106 



Niagara Falls, 97. 99 



Normal curve, opp. 120; absolute time 

 and, 48; method of construction, 47; 

 symbols explained, 48 



North Charlestown, N. H., 22 



Northampton, Mass., 66, 95; brick- 

 yards, 16, 17; flora in varve clay, 89; 

 part of curves (diagr.) 78; reliability 

 of varves, 53. See also Amherst- 

 Northampton region 



Northboro station, N. H., clay pit, 30 



Northeastern States, previous knowl- 

 edge of ice retreat, 94 



Oden, Sven, 103 

 Ontario, Lake, 100 

 Ontario, Lake, basin, 95 



Oscillations of ice border, Amherst- 

 Northampton region, 77; Lake 

 Winnepesaukee region, 81 



Oxbow of Connecticut River, 17 



Park Brickyard, 11 



Passumpsic, Vt., slide, 36 



Passumpsic River, junction with Con- 

 necticut River, 34, 35, 61, 66 



Passumpsic Valley, 66, 83 



Pecowsic Brook, 13 



Peet, C. E., 107 



Pembroke, N. H., 23 



Penacook station, N. H., 26 



Periodicity, climatic, 91 



Peripheral land, rising of, 8 



Plants, pollen in clays, 103. See also 

 Flora 



Podunk River, 12 



Port Huron morainic system, 97 



Post, Lennart von, 103 



Post-glacial time, definition, xi 



Precipitation, 85, 86, 87 



Previous knowledge of ice retreat, 94 



Problems to be studied, 100 



Putney, Vt., brickyard, 19 



Ragunda, xi, 90; flora and climate, 103 



Rainfall, 85, 86, 87 



Rate of recession, 74, 90 



Recession, conditions controlling, 85; 

 previous knowledge, 94; rate, 74. 90; 

 rate in middle zone, 81; rate in 

 northern zone, 83; rate in southern 

 zone, 76; rate of retreat and type of 

 clay, 84 



References, 108 



Rich, J. L., 95, 104, 107 



Rome, N. Y., 100 



St. Johnsbury, Vt., 83, 100; slide near, 



36 

 St. Lawrence Valley, 100 

 Salpausselka, 87, 93 

 Sandegren, R., 103 

 Sauramo, Matti, 79, 88, 92, 93 

 Sayles, R. W., xii, xiii, 90 

 Schenectady, N. Y., 99 

 Sedimentation problems, 10 1, 103 

 Sediments, 9 

 Simon Lake, Quebec, varve clay (ill.), 



opp. 4 



