Terracing of farm lands . portion in the yellow clays in the beeswax and InSSwSad^oS) 11 extremely fine grained or colloidal In texture. This clay is soS?SSit settles with the greatest slowness even from perfectly quiet water. It isZ;• cause of t£^haVacteristfc turbidity of Piedmont streams even during dry seasons nS^*2y?SJ^« ^S« areas of unconsolidated silts which erodew,tn even greater facility than these soils. Since they are subject, however to only nf ,,,Tn r n thev are not affected by surface erosion. They are easily underminedinfrequent *»™^™£ rf dniwbnck to the maintenance of Irrigatio
Terracing of farm lands . portion in the yellow clays in the beeswax and InSSwSad^oS) 11 extremely fine grained or colloidal In texture. This clay is soS?SSit settles with the greatest slowness even from perfectly quiet water. It isZ;• cause of t£^haVacteristfc turbidity of Piedmont streams even during dry seasons nS^*2y?SJ^« ^S« areas of unconsolidated silts which erodew,tn even greater facility than these soils. Since they are subject, however to only nf ,,,Tn r n thev are not affected by surface erosion. They are easily underminedinfrequent *»™^™£ rf dniwbnck to the maintenance of Irrigation «tcS A iSTJS of the excessive turbidity of western streams during high water I,;,,, such soils, the silt burden In these streams at times -»£*?» umuctL as r, per cent, Only in Mississippi and western Tennessee are, then to beSund in the east silt soils more disastrously affected by surface erosion than the mica-clays of the Carolina piedmont. N. C. GEOLOGICAL AND ECONOMIC SURVEY BULLETIN NO. \J. PLATE V. ?j*r *&+ Jm V: ::\ CHARACTERISTIC EROSION OF THE MICA RED CLAYS AND SILT SOILS. VERTICALLY WALLED GORGESARE QUICKLY FORMED IN THESE LOOSE SOILS WHEN UNDERMINING ONCE BEGINS, RESULTING IN THECOMPLETE DESTRUCTION OF THE SOIL FOR FARMING PURPOSES. ABSORPTION OF WATER BY SOILS. 25 there are extensive areas of such soils. Similar areas, but smaller, occurlocally eastward to the very edge of the coastal plain. While usually notdistinguished from the other red clays, the presence of the mica or thesmall particles of sericite or talc, the sparkle of which is very noticeablein the soils when dry and reduced to dust, and the slightly greasy feelwhich is also due to the mica or talc schist, will serve to identify soils are very friable and far easier to cultivate than the heavyclays. They drain more freely and puddle more lightly, but form a heavysticky mud when wet; become dry relatively more quickly after heavyrains; and crumble rather easily when dry; are wa
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectsoils, bookyear1908
