306 LIFE OF THE PLEISTOCENE 



Record of Drake Well near La Grange 



Till, sandy, yellow 10 feet 



Till, blue 41 



Gravel, with inflammable gas 3 



Clay, blue (till?) 46 



Muck, black, with leaves and gas 6 



Clay, soft, blue; no pebbles noted 24 



Sand, water-bearing, coarse near bottom 10 



Total depth 140 feet 



Of the buried soils of Indiana, Leverett says, (p. 64) "The buried muck 

 beds are perhaps as conspicuous in these fiat areas among the hills of central 

 Indiana as are those found between the Illinoian and Kansan drift sheets of 

 southeastern Iowa, but they are not underlain by the highly weathered and 

 oxidized till sheet that characterizes the upper part of the Kansan drift in 

 Iowa. The results of the study, therefore, leave the occurrence of a long inter- 

 val of deglaciation in doubt. " 



b. Loess 

 |H Loess deposits extend up the Wabash and Ohio valleys for many miles 

 and cover, also, much of the intervening territory in southwestern Indiana. 

 Near the rivers a type of loess known as marl-loess occurs which is usually very 

 fossiliferous. The thickness above the Illinoian till or indigenous rock varies 

 from 10 to 30 or 40 feet. This deposit is said to be of aqueous origin, 103 but 

 the fossil species represented do not bear out such an origin. There is no 

 apparent reason for ascribing the deposits in which the land shells were found 

 to agencies other than aeolian. 



Organic remains are reported as follows: 104 



Pike County, 1^2 miles northwest of Petersburg. 



Zonitoides arborea Succinea lineala{ = grosvenori) 



Polygyra monodon Galba humilis modicella 



" midtilineata (reported as Succinea humilis) 



Gibson County, Hazelton, opposite the railroad station. 



Zonitoides arborea Polygyra albolabris 



Bijidaria armifera Succinea lineata ( = grosvenori) 



Pyramidida alternata Uelicina occulta 

 Polygyra hirsuta 



Shells were also found at Patoka, Posey County, V/2 miles east of New 

 Harmony. 



Euconulus fulvus Vallonia cyclophorella 



Bijidaria armifera Succinea lineata (= grosvenori) 



Vertigo tridentala Pomatiopsis lapidaria 



""Fuller and Clapp, Bull. Geol. Soc. Amer., XIV, pp. 166-168, et seq; see also Shaw 

 Science, N. S.,XLI,pp. 104-108, 1915. 

 1M Op. cit., pp. 161-162. 



