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  • Thumbnail for File:BaileyHistory FIG 19.jpg
    ...nd Shales. Llandovery: 4III? and 4III', Upper Birkhill Shales.4III , Lower Birkhill Shales. Caradoc 3II', Barren Mudstones of Hgrtfell Shales. The letters i-n denote ...
    (3,128 × 1,636 (747 KB)) - 21:53, 19 June 2020
  • Thumbnail for File:SWScotlandGraptolitesSuccessionMoffatShales.jpg
    ...ies the highest Birkhill Shales, units I-G are laterally equivalent to the Birkhill Shales; The Leadhills Group is laterally equivalent to the Hanfell and Glenkiln sh ...
    (1,101 × 1,069 (170 KB)) - 13:12, 4 April 2015
  • ...f a trial for copper minerals, associated with an outcrop of green-stained Birkhill Shales. After a further half km Auchencat Burn swings away to the right, but the p ...ed; at Hartfell this side is composed, at least partly, of Lower and Upper Birkhill Shales, but it is very difficult to interpret the stratigraphy in detail. The nort ...
    9 KB (1,417 words) - 22:25, 6 November 2015
  • ...enkiln Shales, the Lower Hartfell Shales and Upper Hartfell Shales and the Birkhill Shales. The latter are abruptly but conformably overlain by greywackes of the Gala ...pworth). It is still worth noting that to the east of this line the rocks (Birkhill shales) are intensely crushed and folded, and little of stratigraphical value can ...
    23 KB (3,378 words) - 11:40, 9 December 2015
  • ...come thicker and more numerous in the succeeding Upper Hartfell Shales and Birkhill Shales ([[Media:P220194.jpg|P220194]]). ...
    14 KB (2,005 words) - 15:09, 1 February 2018
  • ...north from the grey mud-stones, the first black beds encountered are basal Birkhill Shales (4b). Here you can collect fossils of the ''persculptus ''Biozone. Further Gillespie Burn exposes an interesting succession of Upper Hartfell and Birkhill Shales. The Upper Hartfell 'Barren Mudstones' include richly fossiliferous black m ...
    26 KB (3,868 words) - 13:27, 14 March 2024
  • ...t 37 and part of sheet 38 (Northern Ireland).</ref>. In the same area, the Birkhill Shales occur in a number of inliers, notably at Yates Corner, Cunning Burn [J 537 ...
    22 KB (3,276 words) - 13:05, 25 September 2017
  • TOGHILL, P. 1968. The graptolite assemblages and zones of the Birkhill Shales (Lower Silurian) at Dobb's Linn. Palaeontology, 11, 654–668. ...
    37 KB (5,530 words) - 23:26, 11 February 2019
  • ...ng into the overlying Grennan Point Formation to the NW. The black fissile Birkhill Shales contain numerous pale bentonite layers (originally volcanic ash), one of wh ...Biozone have been identified in the Birkhill Shales here. A synform in the Birkhill Shales south of the fault is compatible with the regional stratigraphy in suggesti ...
    56 KB (8,984 words) - 23:08, 13 March 2024
  • ...a on a small scale. A fine example of a strike-slip duplex imbricating the Birkhill Shales occurs below and some 3m north of the low cliff on the southern edge of Coa ...
    17 KB (2,455 words) - 13:06, 25 September 2017
  • ...”</sup> and 4<sup>III’</sup>, Upper Birkhill Shales.<sup>4III</sup>, Lower Birkhill Shales. Caradoc 3II', Barren Mudstones of Hgrtfell Shales. The letters i-n denote ...
    85 KB (13,853 words) - 08:41, 20 June 2020