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| Keywords: The Quarterly journal of the Geological Society of London (13889134969).jpg 12 <br> PEOF T G BONNET ON THE GEOLOGY <br> sea in the face of a precipitous headland difficult of approach and im- <br> possible to descend The two rocks strike a little S of E and the <br> mica-schist so far as can be seen from above appears to plunge at a <br> very high angle beneath the chloritic rock but not more than would be <br> perfectly consistent with a slight overthrow in the folding As we <br> proceed towards the Tail the strike becomes E and W and about <br> a furlong from the junction the dip is distinctly about 60° N We <br> see no more of the mica-schist until as we proceed from the Tail to <br> Hope village by the path along the northern margin of the headland <br> we note some outcropping beds of it in a cove below ; and then beyond <br> another little cove where the coast-line bends sharply to the north <br> we find in the crags of a headland first mica- schist then chloritic <br> schist and lastly mica-schist all seemingly dipping at a high angle <br> to the south The last-named mica-schist also forms the little look- <br> out headland which divides the two coves between which extends <br> the village of Hope It is rather dark in colour and marvellously <br> gnarled and broken but the foliation-planes are often vertical <br> We have only to traverse the rocky shore in the northern cove <br> at Hope for a very short distance to be convinced that as is <br> indicated in the map we have returned to the slaty series Here <br> again the mimicry of foliation and the other results of the tre- <br> mendous pressure which the beds have undergone make it difficult <br> to fix the exact position of the junction but after repeated exami- <br> nation on more than one occasion I came to the conclusion fully <br> confirmed by subsequent microscopic examination that the beds <br> outcropping on the shore were never more than schistose while <br> those in the headland itself wherever I could get at the crag ren- <br> dered difficult each time by the state of tide were true schists so <br> that the fault has probably determined the northern face of the <br> headland <br> Fig 6 ” Diagrammatic Section near Bolt Tail Horizontal scale <br> 3 inches to 1 mile <br> Headland of <br> Eolt Tail Lifeboat Hope village <br> a Slaty rock <br> b Mica- schist <br> Fault <br> c Chloritic schist <br> In the floor of the cove the newer series exhibits considerable <br> variety of mineral character; but in the crags beyond dark slaty rocks <br> predominate bearing a general resemblance to the series in the <br> headland between Hall Sands and Bossons Sands In the distance <br> beyond Avonmouth the peculiar sheen of the cliffs recalls to mind the <br> satiny slates seen at Slapton on the east coast and at Kingsbridge <br> at the head of the estuary 36940731 113697 51125 Page 12 Text 40 http //www biodiversitylibrary org/page/36940731 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 36940731 dc identifier http //biodiversitylibrary org/page/36940731 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 N02/13889134969 2015-08-26 05 51 18 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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