Geological magazine . witli CJwnetes striatella and minima and—R. nucula. L. lata, Holopella ohsoleta, Orhiculoidea ruc/ata, Serpuliteslonqissimus, Cormdites serpularis, etc., also occur. For 5h- feet below the Ludlow Bone-bed occur shales, calcareoussandstones, and flags, with a inore calcareous sandstone at the base,which is lithologically like a zone of D at Downtou Castle Bridge,namely, a white calcareous sandstone in the centre which weatliers toa peculiar and distinctive reddish-brown sandstone, with Chonetesstriatella and minima, R. nucula (all very common), Orthonotasemisulcata, etc. T
Geological magazine . witli CJwnetes striatella and minima and—R. nucula. L. lata, Holopella ohsoleta, Orhiculoidea ruc/ata, Serpuliteslonqissimus, Cormdites serpularis, etc., also occur. For 5h- feet below the Ludlow Bone-bed occur shales, calcareoussandstones, and flags, with a inore calcareous sandstone at the base,which is lithologically like a zone of D at Downtou Castle Bridge,namely, a white calcareous sandstone in the centre which weatliers toa peculiar and distinctive reddish-brown sandstone, with Chonetesstriatella and minima, R. nucula (all very common), Orthonotasemisulcata, etc. The Bone-bed (D^) varies from being 23 inches thick, most ofwhich is an impure limestone, to Bone-bed 4 inches, calcareous sand-stone full of black material 9i inches, Bone-bed 1^ inclies. U. Silurian and OM Med in S. Staffonhhire. 443 Itcontains Chonetes striatella^ , R. nucula, Linfftdasj).(?),fragments of fish scales and bones, Onchus, Thelodus, Holopellaolsoleta, Pachytheca. Rusty-red marly sandstones,. passing into Olive shales with L. minima. Eb One band of massive yellow sandstones, with L. minimaand Orbiculoidea rucjata (36feet thick). Dark-green shale.^Yellow sandstone. [Lingula band.) Green and some yellow grittysandstones with L. Lewisii. Flaggy green sandstones. Green sandstones with throughout. Dolerite. Fig. 3. Section of Downton Sandstones in the lower part of Brewins Tunneland at the Basin Section . Scale 8 feet = 1 inch. ^ This is the lowest bed seen on south side of Brewins Tunnel. {To be concluded in our next Number.) 444 JR. IF. Hoolei/—Ljucuwdon manfelli— IV.—On the Discovery of Eemains of Iguakodon hiantelli inTHE Wealden Eeds OF Brighstonk Bay, Isle of Wight. By Eeginald W. Hooley, rilHE Iguanodon, as is well known, was discovered by jMantell, whoL in 1825 named it from odd teeth which had a resemblance totlie teeth of the recent Iguana. Many isolated teeth and bones weresubsequently found in th
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectgeology, bookyear1864
