{"id":21585,"date":"2020-03-07T16:45:04","date_gmt":"2020-03-07T16:45:04","guid":{"rendered":"https:\/\/www.bgs.ac.uk\/geology-projects\/lambeth-group\/"},"modified":"2021-09-15T12:36:19","modified_gmt":"2021-09-15T12:36:19","slug":"lambeth-group","status":"publish","type":"research_project","link":"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/","title":{"rendered":"Lambeth Group"},"content":{"rendered":"\t\t\t<section class=\"hero-section hero-section-with-social\">\n\t\t\t\t\t\t\t\t<div class=\"hero-info-wrap\">\n\t\t\t\t\t<div class=\"container\">\n\t\t\t\t\t\t<div class=\"row\">\n\t\t\t\t\t\t\t<div class=\"col-12\">\n\t\t\t\t\t\t\t\t<div class=\"hero-info\">\n\t\t\t\t\t\t\t\t\t<h1>Lambeth Group<\/h1>\n\t\t\t\t\t\t\t\t\t<p>BGS Research &mdash; Engineering geology maps<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n\t\t\t<div class=\"social-wrap social-wrap-inline-them\">\n\t\t\t\t<div class=\"sea-background-f\">\n\t\t\t\t\t<span>Share this article<\/span><a target=\"_blank\"  href=\"https:\/\/www.facebook.com\/sharer\/sharer.php?u=https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/\"><span class=\"icon-facebook\"><span class=\"hidden\">Facebook<\/span><\/span><\/a><a target=\"_blank\"  href=\"https:\/\/twitter.com\/intent\/tweet?text=Lambeth%20Group&#038;url=https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/\"><span class=\"icon-twitter\"><span class=\"hidden\">Twitter<\/span><\/span><\/a><a   onclick=\"javascript:void( (function() {var e=document.createElement('script' );e.setAttribute('type','text\/javascript' );e.setAttribute('charset','UTF-8' );e.setAttribute('src','\/\/assets.pinterest.com\/js\/pinmarklet.js?r='+Math.random()*99999999);document.body.appendChild(e)})());\"  href=\"javascript:void(0);\"><span class=\"icon-pinterest\"><span class=\"hidden\">Pinterest<\/span><\/span><\/a><a target=\"_blank\"  href=\"https:\/\/wa.me?text=https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/\"><span class=\"icon-whatsapp\"><span class=\"hidden\">WhatsApp<\/span><\/span><\/a><a   href=\"mailto:?subject=Lambeth%20Group&#038;body=The%20Lambeth%20Group%20was%20deposited%20in%20the%20Palaeogene%20and%20underlies%20much%20of%20the%20city%20of%20London.%20(https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/)\"><span class=\"icon-mail\"><span class=\"hidden\">Email<\/span><\/span><\/a><a href=\"#\" data-copy=\"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/\" class=\"copy-url-on-click\"><span class=\"icon-link\"><span class=\"hidden\">Copy Link<\/span><\/span><\/a><\/div><\/div>\t\t\t\t\t\t\t<\/section>\n\t\t\t\n\n\n<section class=\"wp-block-bgs-blocks-content-container content-section\"><div class=\"container\"><div class=\"row\"><div class=\"col-12\">\n<p>The <a href=\"https:\/\/webapps.bgs.ac.uk\/lexicon\/lexicon.cfm?pub=LMBE\">Lambeth Group<\/a>, formerly known as the Woolwich and Reading Beds, occurs in the London and Hampshire basins, where it directly overlies the <a href=\"https:\/\/webapps.bgs.ac.uk\/lexicon\/lexicon.cfm?pub=CK\">Chalk Group<\/a> or <a href=\"https:\/\/webapps.bgs.ac.uk\/lexicon\/lexicon.cfm?pub=TAB\">Thanet Formation<\/a> and is succeeded by the <a href=\"https:\/\/webapps.bgs.ac.uk\/lexicon\/lexicon.cfm?pub=HWH\">Harwich<\/a> and <a href=\"https:\/\/webapps.bgs.ac.uk\/lexicon\/lexicon.cfm?pub=LC\">London Clay<\/a> formations.<\/p>\n\n\n\n<p>Although generally less than 50&nbsp;m thick, its lithological variability and position beneath much of London has concerned tunnelling engineers since the early nineteenth century.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Summary of engineering problems encountered with the Lambeth Group<\/h2>\n\n\n\n<ul><li>Rapid changes in lithology<\/li><li>Clay with irregular water-bearing sand bodies<\/li><li>Perched water tables<\/li><li>Hard bands that obstruct boring, drilling, excavations and piling<\/li><li>Flint-gravel beds, which are water bearing and may restrict boring progress and increase wear of cutting equipment<\/li><li>Lignite, which may provide differential settlement<\/li><li>Deposits infilling dissolution features in underlying chalk<\/li><li>Fissuring of clay, potentially leading to instability in cuts<\/li><li>De-oxygenation of atmosphere in tunnels cut into <a href=\"https:\/\/webapps.bgs.ac.uk\/lexicon\/lexicon.cfm?pub=UPR\">Upnor Formation<\/a> sandstones<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Geotechnical properties<\/h2>\n\n\n\n<p>Geotechnical data from over 50 ground investigations, held in the <a href=\"https:\/\/www.bgs.ac.uk\/geological-research\/science-facilities\/engineering-geotechnical-capability\/national-geotechnical-properties-database\/\">National Geotechnical Properties Database<\/a>, have been analysed to assess the spatial variation in geotechnical properties across the main formations of the Lambeth Group. An example of the undrained shear strength with depth is presented here.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Acknowledgement<\/h3>\n\n\n\n<p>The BGS gratefully acknowledges the contribution made to parts of this study by Dr Jackie Skipper (engineering stratigrapher, Natural History Museum) based on her extensive experience of the Lambeth Group geology and its associated engineering problems.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Report download<\/h2>\n\n\n\n<p>The&nbsp;<a rel=\"noreferrer noopener\" href=\"http:\/\/nora.nerc.ac.uk\/503110\/\" target=\"_blank\">Engineering Geology of British Rocks and Soils: Lambeth Group<\/a>&nbsp;provides an in-depth study of formations within the Lambeth Group using data held in the&nbsp;National Geotechnical Properties Database.<\/p>\n\n\n\n<p>The geological, lithological, geotechnical, and mineralogical features within the Lambeth Group have been described in detail including applicable geophysical methods for ground investigation.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Publications<\/h2>\n\n\n\n<p>Entwisle, D C, Hobbs, P R N, Northmore, K J, Skipper, J, Raines, M R, Self, S J, Ellison, R A, and Jones, L D. 2013.&nbsp;<a href=\"http:\/\/nora.nerc.ac.uk\/503110\/\" target=\"_blank\" rel=\"noreferrer noopener\">Engineering Geology of British Rocks and Soils: Lambeth Group<\/a>.&nbsp;<em>British Geological Survey Report<\/em>, OR\/13\/006. (Nottingham, UK: British Geological Survey.)<\/p>\n\n\n\n<p>Jones, L D.&nbsp;2001.&nbsp;Determination of the Shrinking and Swelling Properties of the Clays of the Lambeth Group.&nbsp;<em>British Geological Survey Report<\/em>, IR\/01\/054. (Nottingham, UK: British Geological Survey.) <\/p>\n\n\n\n<p>Jones, L D, and Hobbs, P R N.&nbsp;2004.&nbsp;The Shrinkage and Swelling Behaviour of UK soils: the Clays of the Lambeth Group.&nbsp;<em>British Geological Survey Report<\/em>, RR\/04\/001. (Nottingham, UK: British Geological Survey.) <\/p>\n\n\n\t\t\t<div class=\"relatives\">\n\t\t\t\t<h5>Relative topics<\/h5>\t\t\t\t<div>\n\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.bgs.ac.uk\/tag\/engineering-geology\/\" class=\"button primary-background\">engineering geology<\/a>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\n\n\n<p><br><\/p>\n<\/div><\/div><\/div><\/section>\n\n\n\n\n\t\t\t\t\t<section   id=\"latest-content-4381-block_5f059c579c7b2\" class=\"grid-section  primary-background   \" >\n\t\t\t\t\t\t<div class=\"container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"row header-of-section\">\n\t\t\t\t\t\t\t\t<div class=\"col-12\">\n\t\t\t\t\t\t\t\t\t<h2>You may also be interested in:<\/h2>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"row grid-wrap\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"col-lg-6 col-12\">\n\t<div class=\"cards cards-orizontal-sm  cards-find-more  cards-bordered\">\n\t\t\t\t<a href=\"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/\" class=\"media-wrap\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2021\/09\/P732045-150x150.jpg\" class=\"lazy-blur wp-post-image\" alt=\"P732045\" data-src=\"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2021\/09\/P732045.jpg\" \/>\t\t\t\t\t<\/a>\n\t\t\t\t<div class=\"info-wrap\">\n\t\t\t<div class=\"info\">\n\t\t\t\t<h4><a href=\"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/\">Engineering geological studies of bedrock formations<\/a><\/h4>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<p>Mapping the engineering geological characteristics, mineralogy, industrial applications, geological hazard potential, physical properties and behaviour of geological formations.<\/p>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t<a href=\"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/\">Show more<\/a>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n<div class=\"col-lg-6 col-12\">\n\t<div class=\"cards cards-orizontal-sm  cards-find-more  cards-bordered\">\n\t\t\t\t<a href=\"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/\" class=\"media-wrap\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2020\/03\/feature_engineering_geology-150x150.jpg\" class=\"lazy-blur wp-post-image\" alt=\"Engineering Geology Bedrock Map\" data-src=\"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2020\/03\/feature_engineering_geology.jpg\" \/>\t\t\t\t\t<\/a>\n\t\t\t\t<div class=\"info-wrap\">\n\t\t\t<div class=\"info\">\n\t\t\t\t<h4><a href=\"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/\">Engineering geology maps<\/a><\/h4>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<p>BGS has produced 1:1 million-scale engineering geological maps of the UK, attributed with \u2018engineering geological units\u2019 in place of the traditional lithostratigraphical units.<\/p>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t<a href=\"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/\">Show more<\/a>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"row\">\n\t\t\t\t\t\t\t\t<div class=\"col-12\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/section>\n\t\t\t\t","protected":false},"excerpt":{"rendered":"<p>The Lambeth Group was deposited in the Palaeogene and underlies much of the city of London.<\/p>\n","protected":false},"featured_media":78272,"parent":21571,"menu_order":3,"template":"","meta":{"_acf_changed":false,"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"on","_relevanssi_pin_keywords":"lambeth group, engineering geology, engineering geology maps","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"17336,17424,17592,37456,9089,32954","_relevanssi_noindex_reason":""},"tags":[1114],"region":[],"topic":[],"purpose":[],"area":[],"challenge":[],"challenge_topic":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Lambeth Group - British Geological Survey<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Lambeth Group - British Geological Survey\" \/>\n<meta property=\"og:description\" content=\"The Lambeth Group was deposited in the Palaeogene and underlies much of the city of London.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/\" \/>\n<meta property=\"og:site_name\" content=\"British Geological Survey\" \/>\n<meta property=\"article:modified_time\" content=\"2021-09-15T12:36:19+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2021\/09\/P535261.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"640\" \/>\n\t<meta property=\"og:image:height\" content=\"427\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/\",\"url\":\"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/\",\"name\":\"Lambeth Group - British Geological Survey\",\"isPartOf\":{\"@id\":\"https:\/\/www.bgs.ac.uk\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2021\/09\/P535261.jpg\",\"datePublished\":\"2020-03-07T16:45:04+00:00\",\"dateModified\":\"2021-09-15T12:36:19+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/#breadcrumb\"},\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-GB\",\"@id\":\"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/#primaryimage\",\"url\":\"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2021\/09\/P535261.jpg\",\"contentUrl\":\"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2021\/09\/P535261.jpg\",\"width\":640,\"height\":427,\"caption\":\"Lambeth Group overlying Seaford Chalk in M4 works\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.bgs.ac.uk\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Engineering geology maps\",\"item\":\"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Engineering geological studies of bedrock formations\",\"item\":\"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Lambeth Group\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.bgs.ac.uk\/#website\",\"url\":\"https:\/\/www.bgs.ac.uk\/\",\"name\":\"British Geological Survey\",\"description\":\"World-leading geological solutions\",\"publisher\":{\"@id\":\"https:\/\/www.bgs.ac.uk\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.bgs.ac.uk\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-GB\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.bgs.ac.uk\/#organization\",\"name\":\"British Geological Survey\",\"url\":\"https:\/\/www.bgs.ac.uk\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-GB\",\"@id\":\"https:\/\/www.bgs.ac.uk\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2020\/03\/BGS-logo-large.png\",\"contentUrl\":\"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2020\/03\/BGS-logo-large.png\",\"width\":250,\"height\":104,\"caption\":\"British Geological Survey\"},\"image\":{\"@id\":\"https:\/\/www.bgs.ac.uk\/#\/schema\/logo\/image\/\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Lambeth Group - British Geological Survey","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/","og_locale":"en_GB","og_type":"article","og_title":"Lambeth Group - British Geological Survey","og_description":"The Lambeth Group was deposited in the Palaeogene and underlies much of the city of London.","og_url":"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/","og_site_name":"British Geological Survey","article_modified_time":"2021-09-15T12:36:19+00:00","og_image":[{"width":640,"height":427,"url":"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2021\/09\/P535261.jpg","type":"image\/jpeg"}],"twitter_card":"summary_large_image","twitter_misc":{"Estimated reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/","url":"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/","name":"Lambeth Group - British Geological Survey","isPartOf":{"@id":"https:\/\/www.bgs.ac.uk\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/#primaryimage"},"image":{"@id":"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/#primaryimage"},"thumbnailUrl":"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2021\/09\/P535261.jpg","datePublished":"2020-03-07T16:45:04+00:00","dateModified":"2021-09-15T12:36:19+00:00","breadcrumb":{"@id":"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/#breadcrumb"},"inLanguage":"en-GB","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/"]}]},{"@type":"ImageObject","inLanguage":"en-GB","@id":"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/#primaryimage","url":"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2021\/09\/P535261.jpg","contentUrl":"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2021\/09\/P535261.jpg","width":640,"height":427,"caption":"Lambeth Group overlying Seaford Chalk in M4 works"},{"@type":"BreadcrumbList","@id":"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/lambeth-group\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.bgs.ac.uk\/"},{"@type":"ListItem","position":2,"name":"Engineering geology maps","item":"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/"},{"@type":"ListItem","position":3,"name":"Engineering geological studies of bedrock formations","item":"https:\/\/www.bgs.ac.uk\/geology-projects\/engineering-geology-maps\/engineering-geological-studies-of-bedrock-formations\/"},{"@type":"ListItem","position":4,"name":"Lambeth Group"}]},{"@type":"WebSite","@id":"https:\/\/www.bgs.ac.uk\/#website","url":"https:\/\/www.bgs.ac.uk\/","name":"British Geological Survey","description":"World-leading geological solutions","publisher":{"@id":"https:\/\/www.bgs.ac.uk\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.bgs.ac.uk\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-GB"},{"@type":"Organization","@id":"https:\/\/www.bgs.ac.uk\/#organization","name":"British Geological Survey","url":"https:\/\/www.bgs.ac.uk\/","logo":{"@type":"ImageObject","inLanguage":"en-GB","@id":"https:\/\/www.bgs.ac.uk\/#\/schema\/logo\/image\/","url":"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2020\/03\/BGS-logo-large.png","contentUrl":"https:\/\/www.bgs.ac.uk\/wp-content\/uploads\/2020\/03\/BGS-logo-large.png","width":250,"height":104,"caption":"British Geological Survey"},"image":{"@id":"https:\/\/www.bgs.ac.uk\/#\/schema\/logo\/image\/"}}]}},"_links":{"self":[{"href":"https:\/\/www.bgs.ac.uk\/wp-json\/wp\/v2\/research_project\/21585"}],"collection":[{"href":"https:\/\/www.bgs.ac.uk\/wp-json\/wp\/v2\/research_project"}],"about":[{"href":"https:\/\/www.bgs.ac.uk\/wp-json\/wp\/v2\/types\/research_project"}],"version-history":[{"count":7,"href":"https:\/\/www.bgs.ac.uk\/wp-json\/wp\/v2\/research_project\/21585\/revisions"}],"predecessor-version":[{"id":78281,"href":"https:\/\/www.bgs.ac.uk\/wp-json\/wp\/v2\/research_project\/21585\/revisions\/78281"}],"up":[{"embeddable":true,"href":"https:\/\/www.bgs.ac.uk\/wp-json\/wp\/v2\/research_project\/21571"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bgs.ac.uk\/wp-json\/wp\/v2\/media\/78272"}],"wp:attachment":[{"href":"https:\/\/www.bgs.ac.uk\/wp-json\/wp\/v2\/media?parent=21585"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bgs.ac.uk\/wp-json\/wp\/v2\/tags?post=21585"},{"taxonomy":"region","embeddable":true,"href":"https:\/\/www.bgs.ac.uk\/wp-json\/wp\/v2\/region?post=21585"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.bgs.ac.uk\/wp-json\/wp\/v2\/topic?post=21585"},{"taxonomy":"purpose","embeddable":true,"href":"https:\/\/www.bgs.ac.uk\/wp-json\/wp\/v2\/purpose?post=21585"},{"taxonomy":"area","embeddable":true,"href":"https:\/\/www.bgs.ac.uk\/wp-json\/wp\/v2\/area?post=21585"},{"taxonomy":"challenge","embeddable":true,"href":"https:\/\/www.bgs.ac.uk\/wp-json\/wp\/v2\/challenge?post=21585"},{"taxonomy":"challenge_topic","embeddable":true,"href":"https:\/\/www.bgs.ac.uk\/wp-json\/wp\/v2\/challenge_topic?post=21585"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}