The Silurian Rocks of Britain

The Silurian Rocks of Britain

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1899 edition. Excerpt: ...associated with greywackes and shales. On the west bank of the Deugh, at a point about 300 yards from the foot of Pulwhanity Burn, fine specimens of C'lz'mac0g'ra1tus caudutus have been obtained. The black shales occur on the grassy slope about fif feet above the level of the Deugh, and are so completely iso ated that their relations to the surrounding strata. cannot be ascertained. They have supplied the following fossils: Black shales are again exposed on the banks of the Deugh about 200 yards further to the north-east. Small outcrops of the Moifat series come to the smface further to the south-west, in certain tributaries of the river Ken, that drain the lofty watershed of the Kells. These sections will now be described. P u l m a d d y B u r n.----In this stream, about a mile above its junction with the Water of Deugh (Sheet 8 of the Surve Mapl), black shales, visible on the left bank near Largerie, an on t e hill slope to the north-east, are corrugated and crushed and have supplied no graptolites. P u 1 h a r r o w B u rn.--In a small tributary of the Pulharrow Burn, about 550 yards V.N.W. of Nether Forrest, near an old fence, a small outcrop of black shales has yielded Caenogmptus gracilis. Dipl/gm/_ptu-s foliaceus, Cr_1/pfog"/'r.11ius t'r1'c0'r'nis, and Dicell0_r/'rapt'u.s. In the Pulharrow Burn, about half a mile to the west of Net-her Forrest and north of the Bush Cottage, another outcrop of the Moffat series, though not continuous, is interesting on account of the presence of a thin zone of volcanic rocks which seems to occupy a higher horizon than that of the Arenig series. The following ground-plan shows the disposition of the rocks at this place. At the western limit of this section, on the north bank of the stream, ...
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Product details

  • Paperback | 284 pages
  • 189 x 246 x 15mm | 513g
  • United States
  • English
  • black & white illustrations
  • 1236888472
  • 9781236888471