{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T14:24:58Z","timestamp":1753885498276,"version":"3.41.2"},"reference-count":15,"publisher":"Geological Society of London","issue":"1","license":[{"start":{"date-parts":[[2021,8,10]],"date-time":"2021-08-10T00:00:00Z","timestamp":1628553600000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-002"}],"content-domain":{"domain":["www.lyellcollection.org"],"crossmark-restriction":true},"short-container-title":["QJEGH"],"published-print":{"date-parts":[[2022,2]]},"abstract":"<jats:p>The Southwell Topple is a spectacular example of a toppling failure on the southeastern coastline of the Isle of Portland, on the south coast of England. Types of mass movements, which occur around almost the entire coastline of Portland and include some other much smaller but well-known topples, vary depending on local geological and topographical contexts. The \u2018Southwell Landslide\u2019 of 1734 (i.e. the Southwell Topple) differs in most respects from all the others, not least in its size. We examine the historical and geological contexts of the Southwell Topple in order to explain its origins and characteristics. The recently published bathymetric data from the DORIS project reveals the tectonic context for the landslide, particularly the frequent transform faults parallel to the southeastern coastline of Portland and the axis of the Shambles Syncline forming Portland's \u2018central depression\u2019. It appears that the Southwell Topple resulted from coast-parallel tectonic discontinuities \u2013 probably a single joint and\/or transform fault \u2013 through the Portland Stone combined with preferential marine erosion of the underlying weaker Portland Sand.<\/jats:p>","DOI":"10.1144\/qjegh2020-146","type":"journal-article","created":{"date-parts":[[2021,7,13]],"date-time":"2021-07-13T11:20:57Z","timestamp":1626175257000},"update-policy":"https:\/\/doi.org\/10.1144\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Photographic feature: The Southwell Topple \u2013 reassessment of a very large coastal toppling failure on the Isle of Portland, UK"],"prefix":"10.1144","volume":"55","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0327-0498","authenticated-orcid":false,"given":"Alan P.","family":"Dykes","sequence":"first","affiliation":[{"name":"Centre for Earth and Environmental Science Research, School of Engineering and the Environment, Kingston University, Penrhyn Road, Kingston upon Thames, Surrey KT1 2EE, UK"}]},{"given":"Edward N.","family":"Bromhead","sequence":"additional","affiliation":[{"name":"Centre for Earth and Environmental Science Research, School of Engineering and the Environment, Kingston University, Penrhyn Road, Kingston upon Thames, Surrey KT1 2EE, UK"}]}],"member":"1881","published-online":{"date-parts":[[2021,8,10]]},"reference":[{"key":"e_1_3_6_2_1","volume-title":"Landslides and Coastal Erosion at Aldbrough, East Riding of Yorkshire","author":"BGS","year":"2020","unstructured":"BGS 2020a. Landslides and Coastal Erosion at Aldbrough, East Riding of Yorkshire. British Geological Survey, Keyworth, Nottingham, UK, www.bgs.ac.uk\/case-studies\/landslides-and-coastal-erosion-at-aldbrough-east-riding-of-yorkshire-landslide-case-study\/ [accessed 22 December 2020]."},{"key":"e_1_3_6_3_1","volume-title":"A New Seamless Bedrock Map of the Jurassic Coast","author":"BGS","year":"2020","unstructured":"BGS 2020b. A New Seamless Bedrock Map of the Jurassic Coast. British Geological Survey, Keyworth, Nottingham, UK, www.bgs.ac.uk\/research\/marine\/DORIS.html [accessed 21 July 2020]."},{"key":"e_1_3_6_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0016-7878(96)80030-7"},{"key":"e_1_3_6_5_1","doi-asserted-by":"publisher","DOI":"10.1144\/GSL.QJEG.1988.021.02.02"},{"key":"e_1_3_6_7_1","doi-asserted-by":"publisher","DOI":"10.1680\/geot.1973.23.4.495"},{"key":"e_1_3_6_8_1","first-page":"299","article-title":"An acoustic survey of the sea floor south of Dorset and its geological interpretation","volume":"244","author":"Donovan D.T.","year":"1961","unstructured":"Donovan, D.T. and Stride, A.H. 1961. An acoustic survey of the sea floor south of Dorset and its geological interpretation. Philosophical Transactions of the Royal Society B: Biological Sciences, 244, 299\u2013330.","journal-title":"Philosophical Transactions of the Royal Society B: Biological Sciences"},{"key":"e_1_3_6_9_1","volume-title":"Mapping the Seabed with DORIS","author":"Dorset Wildlife Trust","year":"2019","unstructured":"Dorset Wildlife Trust 2019. Mapping the Seabed with DORIS. Dorset Wildlife Trust, Dorchester, Dorset, UK, https:\/\/www.dorsetwildlifetrust.org.uk\/doris [accessed 21 July 2020]."},{"key":"e_1_3_6_10_1","doi-asserted-by":"crossref","unstructured":"Dykes A.P. Bromhead E.N. and Ibsen M. 2016. A new assessment of the Southwell Topple of 1734. In : Aversa S. Cascini L. Picarelli L. and Scavia C. (eds) Landslides and Engineered Slopes. Experience Theory and Practice. Proceedings of the 12th International Symposium on Landslides and Engineered Slopes. CRC Press Boca Raton FL 861\u2013867.","DOI":"10.1201\/b21520-101"},{"key":"e_1_3_6_11_1","volume-title":"Digimap","author":"Edina","year":"2020","unstructured":"Edina 2020. Digimap. Edina, University of Edinburgh, Edinburgh, UK, https:\/\/digimap.edina.ac.uk [accessed 22 July 2020]."},{"key":"e_1_3_6_12_1","volume-title":"Jurassic Coast Trust Homepage","author":"JCT","year":"2020","unstructured":"JCT 2020. Jurassic Coast Trust Homepage. Jurassic Coast World Heritage Site Partnership, Bridport, Dorset, UK, https:\/\/jurassiccoast.org [accessed 22 December 2020]."},{"key":"e_1_3_6_13_1","doi-asserted-by":"publisher","DOI":"10.1144\/qjegh2018-131"},{"key":"e_1_3_6_14_1","doi-asserted-by":"publisher","DOI":"10.1144\/qjegh2020-092"},{"key":"e_1_3_6_15_1","first-page":"1245","volume-title":"Landslides in Research, Theory and Practice, Volume 3","author":"Pugh R.S.","year":"2000","unstructured":"Pugh, R.S., Gabriel, K.R., Bromhead, E.N. and Jenkins, W.G. 2000. Realignment of Priory Corner, Isle of Portland, Dorset. In: Bromhead, E., Dixon, N. and Ibsen, M.-L. (eds) Landslides in Research, Theory and Practice, Volume 3. Thomas Telford, London, 1245\u20131252."},{"key":"e_1_3_6_16_1","doi-asserted-by":"publisher","DOI":"10.1144\/jgs2016-070"},{"key":"e_1_3_6_17_1","volume-title":"The Isle of Portland, Dorset \u2013 An Introduction to the Geology. Internet Field Guide","author":"West I.M","year":"2019","unstructured":"West, I.M. 2019. The Isle of Portland, Dorset \u2013 An Introduction to the Geology. Internet Field Guide. Ian West, Romsey, UK, www.southampton.ac.uk\/\u223cimw\/Portland-Isle-Geological-Introduction.htm [accessed 21 July 2020]."}],"container-title":["Quarterly Journal of Engineering Geology and Hydrogeology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.lyellcollection.org\/doi\/pdf\/10.1144\/qjegh2020-146","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2024,11,19]],"date-time":"2024-11-19T14:27:17Z","timestamp":1732026437000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.lyellcollection.org\/doi\/10.1144\/qjegh2020-146"},"secondary":[{"URL":"https:\/\/geoscienceworld.org\/qjegh\/article-lookup?doi=10.1144\/qjegh2020-146","label":"geoscienceworld"}]},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,8,10]]},"references-count":15,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2022,2,9]]},"published-print":{"date-parts":[[2022,2]]}},"alternative-id":["10.1144\/qjegh2020-146"],"URL":"https:\/\/doi.org\/10.1144\/qjegh2020-146","relation":{},"ISSN":["1470-9236","2041-4803"],"issn-type":[{"type":"print","value":"1470-9236"},{"type":"electronic","value":"2041-4803"}],"subject":[],"published":{"date-parts":[[2021,8,10]]},"assertion":[{"value":"2020-09-04","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2021-06-19","order":1,"name":"revised","label":"Revised","group":{"name":"publication_history","label":"Publication History"}},{"value":"2021-07-07","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2021-08-10","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}],"article-number":"qjegh2020-146"}}