. The soil, its nature, relations, and fundamental principles of management . Fig. 3. — Showing the conversion of rock into soil on a limestone hill. Whoever will visit an abandoned stone quarry wherethe rocks have lain undisturbed for ten or twenty years,will readily observe in the stained and altered surfaces,in the softer, more easily scratched outer layer, and in theslight accumulations of soil, which the rains and the. Fig. 4. — Showing the transition from rock to soil on a limestone plane. winds have swept into the small inequalities of the rock,the initial process of soil formation as i
. The soil, its nature, relations, and fundamental principles of management . Fig. 3. — Showing the conversion of rock into soil on a limestone hill. Whoever will visit an abandoned stone quarry wherethe rocks have lain undisturbed for ten or twenty years,will readily observe in the stained and altered surfaces,in the softer, more easily scratched outer layer, and in theslight accumulations of soil, which the rains and the. Fig. 4. — Showing the transition from rock to soil on a limestone plane. winds have swept into the small inequalities of the rock,the initial process of soil formation as it is still takingplace and has been throughout geologic ages. Passing from the abandoned quarry to some fresh cutalong the railway or roadside, where a hill has been Influence of Rock in Soil Formation. 41 graded down, there may be seen at the top the finishedsoil, and between it and the unaltered placnal p^ravel ororip^inal rock below, as the ease may be, every degree of))rogress from the one into the other, re})resented in and 4, where the first shows the stages of transition as . ._ --^—^-: ■ r^=^^-r,£^^^^-^^ __-_.^.^^^^::^^^^^ -^, =i^---,-^ - ^^. - ^W::y. ■ ^ - rft^^e^^v Fig. 5. — Showing advanced state of erosion. Giants Castle nearCamp Douglas, Wisconsin. they have taken place over the summit of a limestonehill, while the second shows the same facts for a morelevel limestone s
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectsoils, bookyear1895
