Excerpt from Relations of Geology to Agriculture in North-Eastern AmericaOf course, among the vast number of beds of varied thickness which come to the surface in different parts of this large area, there are many to which the above general description will not apply - some which contain more clay and form stiffer soils and some which, though green or gray internally, weather of a red colour, and form reddish soils: but lightness in texture an...
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