{"id":1704,"date":"2016-11-13T11:51:47","date_gmt":"2016-11-13T11:51:47","guid":{"rendered":"https:\/\/bcgs.info\/pub\/?page_id=1704"},"modified":"2021-11-11T15:37:32","modified_gmt":"2021-11-11T15:37:32","slug":"birmingham-trail-14","status":"publish","type":"page","link":"https:\/\/bcgs.info\/pub\/local-geology\/building-stone-trails\/birmingham-trail-14\/","title":{"rendered":"Birmingham Trail 1.4"},"content":{"rendered":"<h3>Birmingham Building Stones Trails<\/h3>\n<p>&nbsp;<\/p>\n<div class=\"center\">\n<ul class=\"pagination\">\n<li><a href=\"https:\/\/bcgs.info\/pub\/birmingham-trail-13\">\u276e Previous<\/a><\/li>\n<li><a href=\"https:\/\/bcgs.info\/pub\/birmingham-trail-11\">1.1<\/a><\/li>\n<li><a href=\"https:\/\/bcgs.info\/pub\/birmingham-trail-12\">1.2<\/a><\/li>\n<li><a href=\"https:\/\/bcgs.info\/pub\/birmingham-trail-13\">1.3<\/a><\/li>\n<li><a class=\"active\" href=\"https:\/\/bcgs.info\/pub\/birmingham-trail-14\">1.4<\/a><\/li>\n<li><a class=\"disabled\" href=\"#\">Next \u276f<\/a><\/li>\n<\/ul>\n<ul class=\"pagination\">\n<li><a href=\"https:\/\/bcgs.info\/pub\/birmingham-trail-21\">Trail 2<\/a><\/li>\n<li><a href=\"https:\/\/bcgs.info\/pub\/birmingham-trail-31\">Trail 3<\/a><\/li>\n<\/ul>\n<\/div>\n<h4>Trail 1: From the Town Hall to the Cathedral <em>continued<\/em><\/h4>\n<div style=\"margin:0 auto; width:700px;\">\n<p><div class=\"leaflet-map WPLeafletMap\" style=\"height:500px; width:700px;\"><\/div><script>\nwindow.WPLeafletMapPlugin = window.WPLeafletMapPlugin || [];\nwindow.WPLeafletMapPlugin.push(function WPLeafletMapShortcode() {\/*<script>*\/\nvar baseUrl = atob('aHR0cHM6Ly97c30udGlsZS5vcGVuc3RyZWV0bWFwLm9yZy97en0ve3h9L3t5fS5wbmc=');\nvar base = (!baseUrl && window.MQ) ?\n    window.MQ.mapLayer() : L.tileLayer(baseUrl,\n        L.Util.extend({}, {\n            detectRetina: 0,\n        },\n        {\"subdomains\":\"abc\",\"noWrap\":false,\"maxZoom\":20}        )\n    );\n    var options = L.Util.extend({}, {\n        layers: [base],\n        attributionControl: false\n    },\n    {\"zoomControl\":true,\"scrollWheelZoom\":false,\"doubleClickZoom\":false,\"fitBounds\":false,\"minZoom\":0,\"maxZoom\":20,\"maxBounds\":null,\"attribution\":\"<a href=\\\"http:\\\/\\\/leafletjs.com\\\" title=\\\"A JS library for interactive maps\\\">Leaflet<\\\/a>; \\u00a9 <a href=\\\"http:\\\/\\\/www.openstreetmap.org\\\/copyright\\\">OpenStreetMap<\\\/a> contributors\"},\n    {});\nwindow.WPLeafletMapPlugin.createMap(options).setView([52.48138,-1.8993],18);});<\/script><script>\nwindow.WPLeafletMapPlugin = window.WPLeafletMapPlugin || [];\nwindow.WPLeafletMapPlugin.push(function WPLeafletScaleShortcode() {window.WPLeafletMapPlugin.createScale({});});<\/script><\/p>\n<script>\nwindow.WPLeafletMapPlugin = window.WPLeafletMapPlugin || [];\nwindow.WPLeafletMapPlugin.push(function WPLeafletMarkerShortcode() {\/*<script>*\/\nvar map = window.WPLeafletMapPlugin.getCurrentMap();\nvar group = window.WPLeafletMapPlugin.getCurrentGroup();\nvar marker_options = window.WPLeafletMapPlugin.getIconOptions({\"title\":\"1. 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Monument to John Heap and William Badger&lt;\/a&gt;'));window.WPLeafletMapPlugin.markers.push( marker );\n        });<\/script>\n<\/div>\n<p>&nbsp;<br \/>\n<em>Cross over Colmore Row and continue to No. 57, at the junction with Church Street.<\/em> <\/p>\n<p><div id=\"attachment_3834\" style=\"width: 298px\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3834\" src=\"https:\/\/bcgs.info\/pub\/wp-content\/uploads\/20210221_114859small-576x1024.jpg\" alt=\"57 Colmore Row\" width=\"288\" height=\"512\" class=\"size-large wp-image-3834\" srcset=\"https:\/\/bcgs.info\/pub\/wp-content\/uploads\/20210221_114859small-576x1024.jpg 576w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/20210221_114859small-169x300.jpg 169w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/20210221_114859small-84x150.jpg 84w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/20210221_114859small-768x1366.jpg 768w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/20210221_114859small-864x1536.jpg 864w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/20210221_114859small-1152x2048.jpg 1152w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/20210221_114859small-scaled.jpg 1440w\" sizes=\"auto, (max-width: 288px) 100vw, 288px\" \/><p id=\"caption-attachment-3834\" class=\"wp-caption-text\">57 Colmore Row<\/p><\/div><strong id=\"16\">16. 57 Colmore Row<\/strong><br \/>\nThe entrance porch to No. 57 is immediately striking for its colourful pillars. These are examples of <strong style=\"color:darkgreen\">Shap Granite<\/strong> which comes from Shap Fell in the Lake District. This is the &#8216;dark&#8217; variety with a rich red-brown matrix and prominent, euhedral <span title=\"A phenocryst is a relatively large and usually conspicuous crystal distinctly larger than the grains of the rock groundmass of an igneous rock.\" rel=\"tooltip\" class=\"tooltipred\">phenocrysts<\/span> of pink, potassic feldspar. It is a late Caledonian granite, intruded around 397Ma into the Borrowdale Volcanics Group and the overlying Windermere Group. The quarry has recently reopened (November 2014) after a long period of inactivity and is currently being worked by the Armstrongs Group. The quarry has a reserve of 20 million tonnes of stone and valid planning permission for mineral extraction until 2042, so this famous decorative stone is once more available to the market.<\/p>\n<p>The plinths supporting the Shap granite columns on either side of the porch are made of <strong style=\"color:darkgreen\">Cairngall Granite<\/strong> quarried near Peterhead in Aberdeenshire. This dark grey granite, like the Rubislaw granite at No. 84, dates from the early part of the Caledonian orogeny around 470Ma. It is famous as the source of the largest flawless block of worked granite ever produced in Britain. This was extracted and fashioned in the construction of the double sarcophagus for Queen Victoria and Prince Albert at the Royal Mausoleum in Windsor. The main fabric of the building is another example of <strong style=\"color:darkgreen\">Bath Stone<\/strong>, and the balustrade is made of <strong style=\"color:darkgreen\">Portland Whitbed<\/strong>. Both are oolitic Jurassic limestones, here showing to good effect the contrasted colour of the two stones. <\/p>\n<p><em>Cross over Church Street to Gusto restaurant (below the Grand Hotel complex)<\/em><\/p>\n<div id=\"attachment_3756\" style=\"width: 867px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3756\" src=\"https:\/\/bcgs.info\/pub\/wp-content\/uploads\/09plus.jpg\" alt=\"Shap Granite at Gusto Restaurant\" width=\"857\" height=\"308\" class=\"size-full wp-image-3756\" srcset=\"https:\/\/bcgs.info\/pub\/wp-content\/uploads\/09plus.jpg 857w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/09plus-300x108.jpg 300w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/09plus-150x54.jpg 150w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/09plus-768x276.jpg 768w\" sizes=\"auto, (max-width: 857px) 100vw, 857px\" \/><p id=\"caption-attachment-3756\" class=\"wp-caption-text\">Shap Granite at Gusto Restaurant &#8211; note the xenolith in the right-hand photo<\/p><\/div>\n<p><strong id=\"17\">17. Gusto Restaurant (below the Grand Hotel)<\/strong><\/p>\n<p>The Grand Hotel was built in 1878 by architect Thomas Plevins. The lower storey is rendered, and it is probably <strong style=\"color:darkgreen\">Portland Stone Whitbed<\/strong> above and around the doorway. Of greatest interest, however, are the granite columns supporting the porch. These are further splendid examples of <strong style=\"color:darkgreen\">Shap Granite<\/strong>. On each side there are twin columns standing on a single plinth with an ovoid section. These were probably added to the fa\u00e7ade in 1890 during a refurbishment by Martin &#038; Chamberlain. There are some spectacular inclusions which, at first sight, appear to be examples of &#8216;xenoliths&#8217;. These are fragments of rock which fall into granite magma and stay intact as it solidifies. However, closer inspection reveals that some of these contain phenocrysts of the pink feldspar, showing that the inclusions are in fact &#8216;enclaves&#8217;. These are patches of mafic magma which, in this case, have captured some lone feldspar phenocrysts but have remained unmixed with the dominant granite mix as it cooled. Xenoliths or enclaves were known as &#8216;heathens&#8217; to the quarrymen and stonemasons.<div id=\"attachment_2202\" style=\"width: 310px\" class=\"wp-caption alignright\"><a href=\"https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/P1160455small.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-2202\" src=\"https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/P1160455small-300x292.jpg\" alt=\"Barclays, 15 Colmore Row\" width=\"300\" height=\"292\" class=\"size-medium wp-image-2202\" srcset=\"https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/P1160455small.jpg 300w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/P1160455small-150x146.jpg 150w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-2202\" class=\"wp-caption-text\">Barclays, 15 Colmore Row<\/p><\/div><em>Walk to the end of the block, at the corner of Colmore Row with Livery Street. Another modern building is occupied by Barclays Bank.<\/em><br \/>\n&nbsp;<br \/>\n<strong id=\"18\">18. Barclays, 15 Colmore Row<\/strong><br \/>\nA yellow, calcarenitic facies of <strong style=\"color:darkgreen\">Bath Stone<\/strong> is also used to clad this building. Close inspection with a hand lens shows the rock to be composed of finely comminuted shell fragments as well as ooids. However the steps are of a pink granite, possibly a variety from Sardinia or from north-western Spain. Further research would be required to confirm the origin of this stone. It is composed of pink-orange potassic feldspars, white plagioclase, greyish quartz and black biotite. <\/p>\n<p>&nbsp;<br \/>\n<strong id=\"19\">19. Cathedral Church of Saint Philip<\/strong><br \/>\nThe Church was designed and built by Thomas Archer, a rare and well-executed example of \u2018English Baroque\u2019. Initial building works were completed in 1715, with the tower added in 1725. Thomas Archer and his brother Andrew were local gentry and landowners who initially supplied the stone from quarries on their own land. This was <strong style=\"color:darkgreen\">Arden Sandstone<\/strong> from Rowington Quarries which decayed rapidly. Refacing the Cathedral began in 1859, and now all the exterior stone was put in place in the 19th and 20th Centuries. The stone used is a variety of buff to white-coloured sandstones from Derbyshire and the Midlands; these include <strong style=\"color:darkgreen\">Darley Dale Sandstone<\/strong> as described above, <strong style=\"color:darkgreen\">White Mansfield Stone<\/strong>, <strong style=\"color:darkgreen\">White Hollington Stone<\/strong> and <strong style=\"color:darkgreen\">Dunhouse Stone<\/strong> (Jones, 2011). However, as at the Council House, distinguishing these stones on the building is no easy task. White Hollington Stone is a buff coloured sandstone from the Triassic strata of Staffordshire, part of the Sherwood Sandstone Group. It is still produced from Tearne\u2019s Quarry near the village of Hollington. Dunhouse Sandstone is another buff sandstone from the Millstone Grit Group, but this time from Cleatlam, County Durham. Both these sandstones are quartz <span title=\"Arenite is a sedimentary clastic rock with sand grain size between 0.0625 mm and 2 mm and contain less than 15% matrix.\" rel=\"tooltip\" class=\"tooltipred\">arenites<\/span> with flecks of mica.<div id=\"attachment_1832\" style=\"width: 634px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/10.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-1832\" src=\"https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/10.jpg\" alt=\"Cathedral Church of Saint Philip\" width=\"624\" height=\"453\" class=\"size-full wp-image-1832\" srcset=\"https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/10.jpg 624w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/10-150x109.jpg 150w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/10-300x218.jpg 300w\" sizes=\"auto, (max-width: 624px) 100vw, 624px\" \/><\/a><p id=\"caption-attachment-1832\" class=\"wp-caption-text\">Cathedral Church of Saint Philip<\/p><\/div>White Mansfield Stone from the Permian Magnesian Limestone should be more recognisable, being an oolitic limestone, but nevertheless a calcarenite with cross-bedding, which can be indistinguishable from a sandstone at distance. However, it should weather a pale yellow or grey. The stone is no longer quarried. The unit from which it came, the Cadeby Formation, outcrops from the East Midlands up through Yorkshire to the coast of County Durham. It has been quarried all along the <span title=\"The strike line of a bed, fault, or other planar feature, is a line representing the intersection of that feature with a horizontal plane.\" rel=\"tooltip\" class=\"tooltipred\">strike<\/span>. The quarries in Mansfield, which produced a fine variety of this stone, were in the town centre, on Quarry Lane.<\/p>\n<p><div id=\"attachment_3835\" style=\"width: 280px\" class=\"wp-caption alignleft\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3835\" src=\"https:\/\/bcgs.info\/pub\/wp-content\/uploads\/20181018_153557small-541x1024.jpg\" alt=\"Henry Buck Memorial\" width=\"270\" height=\"512\" class=\"size-large wp-image-3835\" srcset=\"https:\/\/bcgs.info\/pub\/wp-content\/uploads\/20181018_153557small-541x1024.jpg 541w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/20181018_153557small-158x300.jpg 158w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/20181018_153557small-79x150.jpg 79w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/20181018_153557small-768x1454.jpg 768w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/20181018_153557small-812x1536.jpg 812w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/20181018_153557small.jpg 998w\" sizes=\"auto, (max-width: 270px) 100vw, 270px\" \/><p id=\"caption-attachment-3835\" class=\"wp-caption-text\">Henry Buck Memorial<\/p><\/div><em>Much of the Cathedral Churchyard ceased taking burials in 1848 and became a park. Four prominent memorials are of geological interest, described here in an anti-clockwise direction and starting with the obelisk commemorating Henry Buck at the eastern end of the Cathedral.<\/em><\/p>\n<p><strong id=\"20\">20. Henry Buck Memorial<\/strong><br \/>\nThough it may seem out of proportion for such a grand memorial to be erected in honour of the &#8216;Grand Master of the Manchester Order of Odd Fellows&#8217;, our purpose is to examine the attractive salmon-pink granite used to construct this obelisk. This is <strong style=\"color:darkgreen\">Corrennie Granite<\/strong>, a medium grained biotite granite from the district of Tillyfourie in Aberdeenshire.  It is around 450Ma and another example of the wide range of Scottish granites emplaced during the Caledonian orogeny.  The obelisk rests on an unspecified sandstone base.<\/p>\n<p><em>Proceed round the east end of the Cathedral, noting the colourful patterns in the paving as you go.  This is York Stone showing some spectacular liesegang banding (as described at Stop 2). This machine-cut paving was laid during refurbishment of the Cathedral church yard in 1999, replacing the previous York stone paving slabs which had a more uneven texture.  Head diagonally across the Square towards the red granite obelisk to the south of the Cathedral.<\/em><\/p>\n<div id=\"attachment_1836\" style=\"width: 259px\" class=\"wp-caption alignright\"><a href=\"https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/P1140331small.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-1836\" src=\"https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/P1140331small.jpg\" alt=\"Crimean War Memorial Obelisk\" width=\"249\" height=\"400\" class=\"size-full wp-image-1836\" srcset=\"https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/P1140331small.jpg 249w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/P1140331small-93x150.jpg 93w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/P1140331small-187x300.jpg 187w\" sizes=\"auto, (max-width: 249px) 100vw, 249px\" \/><\/a><p id=\"caption-attachment-1836\" class=\"wp-caption-text\">Crimean War Memorial Obelisk<\/p><\/div>\n<p><strong id=\"21\">21. Crimean War Memorial Obelisk<\/strong><br \/>\nThis red granite obelisk was designed to commemorate the Crimean War and also Lieutenant Colonel Unett who was killed at Sebastopol. Thomas Unett was born in Handsworth and christened in St Philip\u2019s. The monument was probably installed soon after Unett\u2019s death in 1856. The Memorial is constructed of <strong style=\"color:darkgreen\">Peterhead Granite<\/strong>, quite possibly the most popular stone for monuments used in the Victorian Period. It is a distinctive medium to coarse-grained, pink granite with grey, smoky quartz, pink feldspars, hornblende and biotite. It commonly contains rounded <span title=\"An enclave is an aggregate of minerals or rock observed inside a larger rock body\" rel=\"tooltip\" class=\"tooltipred\">enclaves<\/span> of a dioritic, mafic igneous rock, and several are present in this monument. Peterhead Granite is quarried from Stirlinghill to the north of Aberdeen, on the coast. The quarries were in operation for around two hundred years, finally closing in 1956. The Peterhead Pluton was intruded in the Devonian period towards the end of the Caledonian Orogeny at around 406Ma.<\/p>\n<p>&nbsp;<br \/>\n<strong id=\"22\">22. Burnaby Obelisk<\/strong><br \/>\n<div id=\"attachment_1839\" style=\"width: 310px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/11.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-1839\" src=\"https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/11-300x247.jpg\" alt=\"Portrait of Frederick Burnaby\" width=\"300\" height=\"247\" class=\"size-medium wp-image-1839\" srcset=\"https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/11-300x247.jpg 300w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/11-150x124.jpg 150w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/11.jpg 624w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-1839\" class=\"wp-caption-text\">Portrait of Frederick Burnaby<br \/>by James Jacques Tissot<\/p><\/div>An obelisk stands in the Cathedral graveyard, inscribed only with the name Burnaby, Khiva 1876 and Abu Klea 1885. There are few clues as to who Burnaby was for the modern viewer, but he was famous in his day as a soldier, adventurer and general all-round hero. Frederick Gustavus Burnaby (1842-1885) was born the son of a Bedfordshire parson but went on to be the stuff that Victorian adventure stories were made of. His links to Birmingham are somewhat tenuous. He stood unsuccessfully for a seat in Parliament in the 1880s. His most famous exploit was a trip on horseback over 3000 miles of Central Asia to Khiva. He later served in the Desert Column sent to relieve General Gordon at Khartoum and died fighting the forces of the Mahdi at Abu Klea in 1885. The portrait in marble set on the south side of the obelisk makes him look far more like Joe Stalin than the young officer in James Tissot&#8217;s portrait painted in 1970 which is the epitome of &#8216;dashing&#8217;. It is in the National Portrait Gallery (NPG 2642). <div id=\"attachment_1841\" style=\"width: 310px\" class=\"wp-caption alignright\"><a href=\"https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/12.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-1841\" src=\"https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/12-300x230.jpg\" alt=\"Burnaby\u2019s portrait roundel\" width=\"300\" height=\"230\" class=\"size-medium wp-image-1841\" srcset=\"https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/12-300x230.jpg 300w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/12-150x115.jpg 150w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/12.jpg 624w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-1841\" class=\"wp-caption-text\">Burnaby\u2019s portrait roundel<\/p><\/div>This monument was erected following Burnaby&#8217;s death in 1885 and designed by Robert Bridgeman of Lichfield. The obelisk and plinth block with the inscriptions and portrait roundel are in <strong style=\"color:darkgreen\">Portland Stone<\/strong>, with oyster shell fragments weathering out. The lower part of the plinth and steps are in a grey crinoidal limestone. Close inspection shows it to be packed with crinoid fragments, but there are also some nice examples of corals and brachiopod shell fragments too. This is probably one of the crinoidal <strong style=\"color:darkgreen\">Bird\u2019s Eye Marble<\/strong> limestones from Derbyshire (as seen at Stop 7) but these stones are notoriously difficult to source. Nevertheless the Lower Carboniferous Eyam Limestones were widely quarried in places including the quarries around Wirksworth (i.e. Cromford and Middleton) and around Monyash. These were formed as predominantly crinoid reefs on the Derbyshire Carbonate Platform. <strong style=\"color:darkgreen\">Carrara Marble<\/strong> has been used for Burnaby\u2019s portrait roundel. The stone is slightly streaked with grey suggesting that it is Carrara Sicilian Marble, one of the huge varieties of stones available in the Carrara region of Tuscany (note that there are no links with this stone to the Island of Sicily!). Sicilian and similar varieties were excellent for sculpture, not having a strong schistosity. The marbles are sourced from the Alpi Apuane of the Northern Appenines. This unit is a tectonic window revealing Triassic-Jurassic limestones which underwent metamorphism at <span title=\"Greenschists are metamorphic rocks that formed under the lowest temperatures and pressures usually produced by regional metamorphism, typically 300\u2013450 \u00b0C and 2\u201310 kilobars.\" rel=\"tooltip\" class=\"tooltipred\">greenschist<\/span> facies during the formation of the Alps (and the Appenines) during the Oligocene to early Miocene (c.30-23Ma). <\/p>\n<p><div id=\"attachment_1926\" style=\"width: 321px\" class=\"wp-caption alignright\"><a href=\"https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/P1150251small.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-1926\" src=\"https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/P1150251small.jpg\" alt=\"Monument to John Heap and William Badger\" width=\"311\" height=\"400\" class=\"size-full wp-image-1926\" srcset=\"https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/P1150251small.jpg 311w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/P1150251small-117x150.jpg 117w, https:\/\/bcgs.info\/pub\/wp-content\/uploads\/2016\/11\/P1150251small-233x300.jpg 233w\" sizes=\"auto, (max-width: 311px) 100vw, 311px\" \/><\/a><p id=\"caption-attachment-1926\" class=\"wp-caption-text\">Monument to John Heap and William Badger<\/p><\/div><em>Walk towards the eastern end of the Cathedral Churchyard and a small monument in the form of a column drum. <\/em><\/p>\n<p><strong id=\"23\">23. Monument to John Heap and William Badger<\/strong><br \/>\nHeap and Badger were builders working on the construction of Birmingham Town Hall and they were both killed by a falling pedestal whilst working on the construction in 1833. Their monument here is the curtailed shaft of a fluted column, modelled on those used at the Town Hall, and the memorial contains the stone which killed them. Like the Town Hall itself this monument is constructed from <strong style=\"color:darkgreen\">Penmon Marble<\/strong> from Anglesey, poignantly linking together the start and finish of this trail. Fittingly, this monument is the focus for International Workers Day on 1st May each year.<\/p>\n<p><em>The Cathedral churchyard is the final stop on this walking tour. The southern side of Cathedral Yard, Temple Row, is covered in the third and final trail in this series of geological walking tours of Birmingham\u2019s city centre: &#8216;Around the Shops&#8217;.<\/em><\/p>\n<p><em>This is the last page of Trail 1.<\/em><\/p>\n<p>&nbsp;<\/p>\n<div class=\"center\">\n<ul class=\"pagination\">\n<li><a href=\"https:\/\/bcgs.info\/pub\/birmingham-trail-13\">\u276e Previous<\/a><\/li>\n<li><a href=\"https:\/\/bcgs.info\/pub\/birmingham-trail-11\">1.1<\/a><\/li>\n<li><a href=\"https:\/\/bcgs.info\/pub\/birmingham-trail-12\">1.2<\/a><\/li>\n<li><a href=\"https:\/\/bcgs.info\/pub\/birmingham-trail-13\">1.3<\/a><\/li>\n<li><a class=\"active\" href=\"https:\/\/bcgs.info\/pub\/birmingham-trail-14\">1.4<\/a><\/li>\n<li><a class=\"disabled\" href=\"#\">Next \u276f<\/a><\/li>\n<\/ul>\n<ul class=\"pagination\">\n<li><a href=\"https:\/\/bcgs.info\/pub\/birmingham-trail-21\">Trail 2<\/a><\/li>\n<li><a href=\"https:\/\/bcgs.info\/pub\/birmingham-trail-31\">Trail 3<\/a><\/li>\n<\/ul>\n<\/div>\n<p>&nbsp;<\/p>\n<p><strong>References:<\/strong><\/p>\n<ul>\n<li>Foster, A. (2007), Birmingham. Pevsner Architectural Guides. Yale University Press, Newhaven &#038; London. 326 pp.<\/li>\n<li>Noszlopy, G. T. &#038; Waterhouse, F. (2007), Birmingham: Public Sculpture Trails. Liverpool University Press, Liverpool. 191 pp.<\/li>\n<li>Schroder, J.K., Schroder, J. &#038; Robinson, E. (2015) Building Stones Detective Trail. University of Birmingham Lapworth Museum of Geology. 2 pp.<\/li>\n<li>Shilston, P. (1994), Building Stones of Birmingham City Centre, ESTA conference Field Workshop Handbook, Birmingham University, Black Country Geological Society; Revised by Julie Schroder 2016. 7 pp.<\/li>\n<li>Walkden, G. (2015a), Devonshire Marbles: their geology, history and uses. Volume 1. Understanding the marbles. Geologists\u2019 Association Guide no. 72. The Geologists\u2019 Association, London. 1-232.<\/li>\n<li>Walkden, G. (2015b), Devonshire Marbles: their geology, history and uses. Volume 2. Recognising the marbles. Geologists\u2019 Association Guide no. 72. The Geologists\u2019 Association, London. 233-484.<\/li>\n<li>National Portrait Gallery: <a href=\"http:\/\/www.npg.org.uk\/collections\/search\/portrait\/mw00932\/Frederick-Burnaby\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/www.npg.org.uk\/collections\/search\/portrait\/mw00932\/Frederick-Burnaby<\/a><\/li>\n<\/ul>\n<p>&nbsp;<br \/>\nThe reproduction of the portrait of Frederick Burnaby by James Jacques Tissot, NPG 2642, was made available for use here by the National Portrait Gallery via a creative commons licence <a href=\"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/3.0\/\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/creativecommons.org\/licenses\/by-nc-nd\/3.0\/<\/a><\/p>\n<p>The maps are taken from <a href=\"http:\/\/www.openstreetmap.org\" target=\"_blank\" rel=\"noopener noreferrer\">OpenStreetMap<\/a>. OpenStreetMap\u00ae is open data, licensed under the Open Data Commons Open Database License (ODbL) by the OpenStreetMap Foundation (OSMF). For further copyright details see <a href=\"http:\/\/www.openstreetmap.org\/copyright\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/www.openstreetmap.org\/copyright<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Birmingham Building Stones Trails &nbsp; \u276e Previous 1.1 1.2 1.3 1.4 Next \u276f Trail 2 Trail 3 Trail 1: From the Town Hall to the Cathedral continued &nbsp; Cross over Colmore Row and continue to No. 57, at the junction <span class=\"excerpt-dots\">&hellip;<\/span> <a class=\"more-link\" href=\"https:\/\/bcgs.info\/pub\/local-geology\/building-stone-trails\/birmingham-trail-14\/\"><span class=\"more-msg\">Continue reading &rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1713,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_mc_calendar":[],"footnotes":""},"class_list":["post-1704","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/bcgs.info\/pub\/wp-json\/wp\/v2\/pages\/1704","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bcgs.info\/pub\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/bcgs.info\/pub\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/bcgs.info\/pub\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bcgs.info\/pub\/wp-json\/wp\/v2\/comments?post=1704"}],"version-history":[{"count":71,"href":"https:\/\/bcgs.info\/pub\/wp-json\/wp\/v2\/pages\/1704\/revisions"}],"predecessor-version":[{"id":3903,"href":"https:\/\/bcgs.info\/pub\/wp-json\/wp\/v2\/pages\/1704\/revisions\/3903"}],"up":[{"embeddable":true,"href":"https:\/\/bcgs.info\/pub\/wp-json\/wp\/v2\/pages\/1713"}],"wp:attachment":[{"href":"https:\/\/bcgs.info\/pub\/wp-json\/wp\/v2\/media?parent=1704"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}