The American journal of science and arts . h, which isevidently encroaching rapidly at this time in consequence of astrong current setting against the bank at this point, situated as itis in the lower part of a considerable bend, which the river makeshere. I will now proceed to give, in a manner as condensed as pos-sible, a statement of the result of a more thorough examin-ation. Figure 2, represents a section of the bluff. No. 1. A layer of reddish sandy clay which forms the sub-soilin this region. No 2. A bed of sand of variable thickness, in which water isobtained, by sinking wells to it in
The American journal of science and arts . h, which isevidently encroaching rapidly at this time in consequence of astrong current setting against the bank at this point, situated as itis in the lower part of a considerable bend, which the river makeshere. I will now proceed to give, in a manner as condensed as pos-sible, a statement of the result of a more thorough examin-ation. Figure 2, represents a section of the bluff. No. 1. A layer of reddish sandy clay which forms the sub-soilin this region. No 2. A bed of sand of variable thickness, in which water isobtained, by sinking wells to it in various parts of the adjoiningcounty. It often contains, and sometimes lies between beds of 120 Bituminization of Wood. quartz pebbles, which bear the marks of shells, encrinites, favos-ites, asterias, &c. ; and there are often associated with it, lumpsor sometimes large masses of soft and bright red clay, withoutgrit, of the kind usually found accompanying veins of lead ore,in the western country; thickness 10 feet. Figure 2. 12 No. 3. A bed of bluish clay intermixed with a little sand, 22 ft. No. 4. A very thin layer of vegetable matter, consisting ofsmall sticks, some of which are flattened and bitumanized. Thisbed sometimes vanishes and re-appears at short intervals. Itsthickness though varying, may be set down at one inch. No. 5. A bed of fine-grained aluminous clay, of a deep bluecolor, which seems to have a tendency to break into blocks of ir-regular cubic or prismatic forms, on account of thin septse or lam-inae of a ferruginous brown color, which traverse it in various di-rections. Reniform concretions are also formed in this clay,which, when they first fall out, have the color of the clay, andseem to differ from it only by being a little harder. After beingexposed for some time, they present the appearance of beingworn by running water; their surface becomes of a deep browncolor, but if broken, they will be found as light colored within,as the clay in which they
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Keywords: ., bo, bookcentury1800, bookpublishernewhavensconverse, bookyear1820
