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| Keywords: The Quarterly journal of the Geological Society of London (14095804313).jpg 2 PEOF T G BONNET ON THE GEOLOGY <br> this district is described in the paper of Sedgwick and Murchison <br> ' On the Stratified Deposits of Devonshire Trans Geol Soc <br> ser ii vol v p 633 and in the Eeport of Sir H Dela Beche <br> In these two works which after the lapse of more than forty years <br> are still of the greatest value the stratigraphy of Sonth Devon is <br> excellently sketched and the main problems relating to it are <br> clearly enunciated Briefly stated the latter amount to this Does <br> this district indicate a progressive metamorphic action which in- <br> creases in intensity as we proceed southwards or do we find here <br> two distinct and independent series the southern a group of highly <br> metamorphosed rocks true schists the northern slates such as are <br> common elsewhere in Devonshire with no signs of a transition <br> from the one to the other Sedgwick and Murchison if I under- <br> stand them rightly incline to the latter view ; Sir Henry De la <br> Beche inclines though hesitatingly to the former which appears <br> generally to have found favour with later writers including Mr <br> Pengelly himself Accordingly the schists of the southern part of <br> this district are regarded simply as altered Palaeozoic rocks possibly <br> of Devonian age whose upheaval is connected with the series of <br> Pig 1 ” Shetcli-majp of the South Devon Coast from Torcross to <br> Ho;pe Cove Scale about 3 miles to 1 inch <br> a Slaty Series <br> b Mica-schist <br> c Chloritic schist <br> A A Bands of Mica-schist interstratified with <br> lower parts of Chloritic schist <br> a a Boundary in the Survey Map <br> B Axis of Chloritic schist <br> poet-Carboniferous disturbances which have affected the south-west <br> of England and whose metamorphism is probably due to some <br> proximate protrusions of igneous rock analogous to those yet visible <br> This opinion is also adopted with some hesitation by Dr H B Holl in <br> his invaluable paper On the Older Rocks of S Devon and Cornwall Quart <br> Journ Geol Soc vol xxiv p 400 36940771 113697 51125 Page 2 Text 40 http //www biodiversitylibrary org/page/36940771 1884 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 40 1884 Geology Periodicals Smithsonian Libraries bhl page 36940771 dc identifier http //biodiversitylibrary org/page/36940771 smithsonian libraries Information field Flickr posted date ISOdate 2014-04-30 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/14095804313 2015-08-26 05 52 17 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1884 Photos uploaded from Flickr by Fæ using a script | ||||
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