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| Keywords: The Quarterly journal of the Geological Society of London (13071211583).jpg MOOEE ABNORMAL SECO DART DEPOSITS <br> 521 <br> 8 Section at Brocastle On taking the road from Bridgend to <br> Cowbridge numerous small Liassic sections are passed in which Ain- <br> monites Sauzianus and other remains show that they represent the <br> higher members of the Bridgend section After passing these quar- <br> ries and finding them all of the same general character it was my <br> intention to proceed direct to Cowbridge ; but when midway at <br> Brocastle at the mouth of the Liassic inlet previously indicated I <br> observed a limekiln some way up an arable field on the right of the <br> roadway and thinking the beds there might occupy a difi'erent horizon <br> I determined to give them an examination Instead of a Liassic it <br> proved to be a Carboniferous Limestone quarry very full of encri- <br> nital and other remains of that age A shallow cartway from the <br> field led into the northern face of the limestone On leaving the <br> quarry a thin deposit of conglomerate resting on the limestone <br> immediately under the soil attracted my attention and was at once <br> seen to contain many beautifal corals and univalves the age of which <br> could not then be recognized but the Liassic character of which sub- <br> sequent examinations revealed <br> The section itself given below rendered at first but little assist- <br> ance in determining the age of the deposit <br> Fig 6 Section at Brocastle <br> a Lower Lias <br> b Conglomerate <br> c Carboniferous Limestone <br> d Lead-vein <br> d A vertical fissure about 3 feet wide formerly sunk about 50 feet in depth <br> for lead-ore <br> c Eastern face of nearly horizontal Carboniferous Limestone 12 feet thick <br> leading in from the field to the quarry <br> b Capping of Liassic conglomerate accommodating itself to the edges of <br> the beds or to the surface of the Carboniferous Limestone when it formed the <br> base of the Liassic sea averaging about 1 foot in thickness <br> a Dense irregularly bedded Pentacrinital Liassic limestones with Rhyncho- <br> nella variabilis and corals exposed for about 5 feet in height but the thickness <br> of which is unknown dipping slightly towards the centre of the Bx'idgend basin <br> abutting against and gradually passing into the conglomerate <br> The very interesting fossiliferous deposit No 3 is in part com- <br> posed of angular blocks of Carboniferous Limestone united by a very <br> dense variegated yellow grey or bluish Liassic limestone and en- <br> closing also small pockets of Carboniferous Limestone sand with <br> organic remains of that age and into which colonies of Liassic Litho- <br> domi have penetrated <br> The bivalves of this deposit are usually so surrounded by its dense <br> matrix as to be difficult of extraction and for this reason are as yet <br> but imperfectly represented in my collection Some of the corals 36345276 112028 51125 Page 521 Text v 23 http //www biodiversitylibrary org/page/36345276 1867 Geological Society of London NameFound Sauzianus Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 23 1867 Geology Periodicals Smithsonian Libraries bhl page 36345276 dc identifier http //biodiversitylibrary org/page/36345276 smithsonian libraries Information field Flickr posted date ISOdate 2014-03-10 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/13071211583 2015-08-26 13 53 09 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1867 Photos uploaded from Flickr by FĂŚ using a script | ||||
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