Drumlins/Subglacial Lineations Ireland (BRITICE glacial landforms)

A drumlin, from the Irish word droimnín is an elongated hill in the shape of an inverted spoon or half-buried egg formed by glacial ice acting on underlying unconsolidated till or ground moraine. Drumlins and drumlin clusters are glacial landforms composed primarily of glacial till. They form near the margin of glacial systems, and within zones of fast flow deep within ice sheets, and are commonly found with other major glacially-formed features (including tunnel valleys, eskers, scours, and exposed bedrock erosion. About: This layer comes from Britice version two, which is updated since 2004. The imprint of the last ice sheet on Britain and Ireland has been studied for over 100 years. During this time, scientists conducting fieldwork and mapping from satellite data and aerial photography produced geomorphological (landform) maps, documenting the distribution of landforms left behind by the ice sheet. We reviewed over 1,800 publications from the academic literature, British Geological Survey and Irish Geological Survey mapping.鼓丘（drumlin）一词源自爱尔兰语droimnín，是一种由冰川作用于下伏未固结冰碛物或底碛而形成的长条形山丘，外形呈倒勺状或半掩埋的蛋形。 鼓丘及鼓丘群是以冰碛物为主要构成的冰川地貌。它们多形成于冰川系统的边缘区域，以及冰盖内部的快速流动带，且常与其他主要冰川成因地貌伴生，包括隧道谷、蛇形丘、冲刷痕与裸露基岩侵蚀地貌。 关于：本数据集图层源自Britice第二版，该版本自2004年起持续更新。对不列颠与爱尔兰地区末次冰盖的地貌印记研究已逾百年。在此期间，科学家通过野外实地考察、卫星数据与航空摄影测绘，制作了地貌（地形）图，记录了冰盖遗留的各类地貌的分布情况。我们审阅了来自学术文献、英国地质调查局及爱尔兰地质调查局测绘资料的1800余篇相关成果。