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The Bluffs of the river rise to the hight of from 2 to 300 feet and in most places nearly perpendicular; they are formed of remarkable white Sandstone which is Sufficiently Soft to give way readily to the impression of water; two or three thin horizontal Stratas of white free Stone, on which the rains or water make no impression, lie imbeded in those clifts of Soft Stone near the upper part of them; the earth on the top of these clifts is a dark rich loam, which forming a gradual ascending plain extend back from 1/2 a mile to a mile where the hills commence and rise abruptly to the hight of about 300 feet more.
We Set Sail under a gentle Breeze from the S. E. at 7 miles passed a white Clay marl or Chalk Bluff under this Bluff is extensive I discovered large Stone much like lime incrusted with a Clear Substance which I believe to be Cabalt, also ore is imbeded in the Dark earth, resembling Slate much Softer- above this Bluff we had the Prarie Set on fire to let the Souix See that we were on the river, & as a Signal for them to Come to it.
The wind blew so hard this morning that we did not sent out untill 10 A.M. we employed the chord most of the day; the river becomes more rappid and is intercepted by shoals and a greater number of rocky points at the mouths of the little gulies than we experienced yesterday. the bluffs are very high steep rugged, containing considerable quantities of stone and border the river closely on both sides; once perhaps in the course of several miles there will be a few acres of tolerably level land in which two or thre impoverished cottonwood trees will be seen. great quantities of stone also lye in the river and garnish it's borders, which appears to have tumbled from the bluffs where the rains had washed away the sand and clay in which they were imbeded. the bluffs are composed of irregular tho horizontal stratas of yellow and brown or black clay, brown and yellowish white sand, of soft yellowish white sand stone and a hard dark brown free stone, also of large round kidneyformed and irregular seperate masses of a hard black Iron stone, which is imbeded in the Clay and sand. some little pine spruce and dwarf cedar on the hills. some coal or carbonated wood still makes it's appearance in these bluffs, pumicestone and birnt hills it's concommutants also are seen. the salts and quarts are seen but not in such abundance. the country more broken and barren than yesterday if possible. about midday it was very warm to this the high bluffs and narrow channel of the river no doubt contributed greatly. we passed a small untimbered Island this morning on the Lard. side of the river just above our encampment of last evening. saw a few small herds of the Bighorned anamals and two Elk only, of the last we killed one, the river is generally about 200 yds. wide, very rappid and has a perceptable fall or declination through it's whole course.
The country which borders the river is high broken and rocky, generally imbeded with a Soft Sand Stone higher up the hill the Stone is of a brownish yellow hard and gritty those Stones wash down from the hills into the river and cause the Shore to be rocky &c. which we find troublesom to assend there is Scerce any bottom between the Hills & river and but a fiew trees to be Seen on either Side except Scattering pine on the Sides of the emence hills; we passed 2 Creeks on the Stard Side both of them had running water in one of those Creek Capt Lewis tells me he saw Soft Shell Turtle Capt Lewis in his walk killed a fat Buffalow which we were in want of our hunters killed 2 Mountain rams or bighorns in the evening late we passed a rapid which extended quite across the river we assended it by the assistance of a Cord & poles on the Lard.
The bluffs of the river rise to the hight of from 2 to 300 feet and in most places nearly perpendicular; they are formed of remarkable white sandstone which is sufficiently soft to give way readily to the impression of water; two or thre thin horizontal stratas of white free-stone, on which the rains or water make no impression, lie imbeded in these clifts of soft stone near the upper part of them; the earth on the top of these Clifts is a dark rich loam, which forming a graduly ascending plain extends back from 1/2 a mile to a mile where the hills commence and rise abruptly to a hight of about 300 feet more.
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