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Structures include roches mouton\u00e9es develop on gneiss, compound bedrock-sediment bedforms (crag and tail structures), flutes, and small diamicton ridges. The glacial sediments and landforms are undergoing incision and terrace development by meltwater streams. Glacial geomorphological and surface geological maps, in concert with elevation models of difference between July 2019 and July 2020 highlight considerable changes to the forefield over a 12-month time period. Till exposed within the last 20 years has undergone substantial mass wasting and re-deposition as subaerial mass flows, or reworked into stream deposits. The lee sides of many roches mouton\u00e9es completely lack subglacial sediment, and instead contain a sand and gravel deposit interpreted to result from glaciofluvial deposition. Thus, insights into the rates of erosion and deposition in a complex, proglacial setting, allow some of these processes to be quantified for the first time. Repeated monitoring of glacier forefields is expected to yield a better understanding of the preservation potential of proglacial sedimentary facies, and hence their preservation potential in Earth's sedimentary record.<\/jats:p>\n          <jats:p content-type=\"supplementary-material\">\n            <jats:bold>Supplementary material:<\/jats:bold>\n            A comparison of 3D model parameters for 2019 and 2020 data is available at\n            <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" specific-use=\"dataset is-supplemented-by\" xlink:href=\"https:\/\/doi.org\/10.6084\/m9.figshare.c.5664299\">https:\/\/doi.org\/10.6084\/m9.figshare.c.5664299<\/jats:ext-link>\n          <\/jats:p>","DOI":"10.1144\/jgs2021-052","type":"journal-article","created":{"date-parts":[[2021,10,28]],"date-time":"2021-10-28T21:40:14Z","timestamp":1635457214000},"update-policy":"https:\/\/doi.org\/10.1144\/crossmark-policy","source":"Crossref","is-referenced-by-count":5,"title":["Rapid geomorphological and sedimentological changes at a modern Alpine ice margin: lessons from the Gepatsch Glacier, Tirol, Austria"],"prefix":"10.1144","volume":"179","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7213-5874","authenticated-orcid":false,"given":"Daniel Paul","family":"Le Heron","sequence":"first","affiliation":[{"name":"Department of Geology, Althanstra\u00dfe 14, University of Vienna, 1090 Vienna, Austria"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2398-1676","authenticated-orcid":false,"given":"Christoph","family":"Kettler","sequence":"additional","affiliation":[{"name":"Department of Geology, Althanstra\u00dfe 14, University of Vienna, 1090 Vienna, Austria"}]},{"given":"Bethan J.","family":"Davies","sequence":"additional","affiliation":[{"name":"Department of Geography, Royal Holloway University of London, Surrey TW20 0EX, UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1095-453X","authenticated-orcid":false,"given":"Lars","family":"Scharfenberg","sequence":"additional","affiliation":[{"name":"Department of Geology, Althanstra\u00dfe 14, University of Vienna, 1090 Vienna, Austria"}]},{"given":"Lukas","family":"Eder","sequence":"additional","affiliation":[{"name":"Department of Geology, Althanstra\u00dfe 14, University of Vienna, 1090 Vienna, Austria"}]},{"given":"Michael","family":"Ketterman","sequence":"additional","affiliation":[{"name":"Department of Geology, Althanstra\u00dfe 14, University of Vienna, 1090 Vienna, Austria"}]},{"given":"Gerit E.U.","family":"Griesmeier","sequence":"additional","affiliation":[{"name":"Geological Survey, Neulinggasse 38, 1030 Vienna, Austria"}]},{"given":"Rhiannon","family":"Quinn","sequence":"additional","affiliation":[{"name":"Department of Geography, Royal Holloway University of London, Surrey TW20 0EX, UK"}]},{"given":"Xiaoshuai","family":"Chen","sequence":"additional","affiliation":[{"name":"Institute of Geology, Chinese Academy of Geological Sciences, No. 26 Baiwanzhuang Street, 100037 Beijing, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7732-9977","authenticated-orcid":false,"given":"Thomas","family":"Vandyk","sequence":"additional","affiliation":[{"name":"Department of Geography, Royal Holloway University of London, Surrey TW20 0EX, UK"}]},{"given":"Marie E.","family":"Busfield","sequence":"additional","affiliation":[{"name":"Department of Geography and Earth Sciences, Aberystwyth University, Llandinam Building, Penglais Campus, Aberystwyth SY23 3DB, UK"}]}],"member":"1881","published-online":{"date-parts":[[2021,11,25]]},"reference":[{"key":"e_1_3_6_2_1","doi-asserted-by":"crossref","unstructured":"Antoniazza G. and Lane S.L. 2021. 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