Observations on the different strata of earths, and minerals. More particularly of such as are found in the coal-mines of Great Britain / By John Strachey.

  • Strachey, John
Date:
1727
Catalogue details

Licence: Public Domain Mark

Credit: Observations on the different strata of earths, and minerals. More particularly of such as are found in the coal-mines of Great Britain / By John Strachey. Source: Wellcome Collection.

    10/22 page 10
    c ’o ] r: fo if they fink on any of the lower Veins, they go more to the North-Weft ; Next, under this, is the TeauVein, fo denominated, becaufe it is figured with Eyes, refembling thofe in a Peacock’s Tail, which Bird, in Somerfetjhire Diale d, is called a Teaw. The Cliff lying between the former Vein, and this, is variegated with Cockle Shells and Fern Branches* and where they find thefe Variegations in the Cliff, Tis a certain Indication that they are coming to this Vein which is fearched after about 15 Fathom to the North-Weft of the former 5 under this, and between five and fix Fathom lower, lies the Smith Coal Vein7 about a Yard thick, and under that, about the fame Depth lower, is the Shelly-Vein, and as much lower again, lies a Vein of Ten Inches, which being little valued, I can give little Account of $ and fome fay there is another under this again, but it has not been wrought in the Memory of Man. At Farringdon they have the fame Veins with the foregoing, and, as 1 am informed, agree in every Part $ but as this is diftant four Miles South- Eaft, from thofe at Bijhop-Sutton, fo in their regular Courfe they would lie a Mile and one third deeper than thofe at Sutton, but they appear to be near the fame Depth, and therefore there muft be a Trap up, of a Mile and one third between the two Works. Between Farringdon and Lit¬ tleton they keep their regular Courfe, but at Littleton the deepeft Vein is the beft Coal, and is about a Yard thick* though the fame proves fmall at Farringdon-, which is but a Mile afunder. NOW between thefe Works there are Hills, the Tops whereof are a ftony-arable, mixed with a fpungy Earth and Clay, which being removed, there are Quarries of White Lyas of different Strata, or Beds, which keep a regular Courfe to about 10 or 12 Feet in Depth* then a Clay, and regularly at four Fathom under the loweft Bed of Lyas is found a Blue Marie about a Yard thick, then an infipid Earth of the fame Thicknefs, under which lies a black Marie fatter than the former, and under that a fpungy yellowifh Earth s all this lies above the Red Soil, which, 1 faid, is gene- - rally on the Surface of the Valleys, in which the Coal dug in
    digitised image 1
    digitised image 2
    digitised image 3