Drumlins and Pleistocene Ice Flow over the Ards Peninsula/Strangford Lough Area, County Down, Ireland

Abstract

ABSTRACT. The geographical distribution of the drumlins was studied. They are arranged in bands perpendicular to ice pressure with a weaker alignment parallel to ice flow. An hypothesis of drumlin origin is presented. Two ice flows are present, a strong flow from an Irish centre to the north-west, and a weaker flow of Scottish ice from the north. REsuME. Drumlins et ecoulement pliistocene de la glace sur la Ards Peninsula, region de Strangford Lough, CountyDown, Ireland. On a etudie la distribution des drumlins. lis sont ranges en ban des perpendiculaires a la pression de la glace avec un alignement moins marque parallele a l'ecoulement de la glace. On peut distinguer deux courants de glace, le plus fort d'un centre irlandais vers le nord-ouest, et un courant plus faible de glace ecossaise venant du nord. ZUSAMMENFASSUNG. Drumlins und Fliessrichtung des Eises im Pleistoziin uher dem Ards

Morphological and morphometric analyses of drumlin bedforms in the omagh basin, north central ireland

“…This pattern is also seen elsewhere in the north central Ireland drumlin belt (i.e. Vernon 1966;Hill 1973;Hanvey 1988), and may be related to largerscale patterns of overprinted bedform such as Rogen moraines, which often show drumlinized crests (Lundqvist 1997;Knight and McCabe in press).…”

Using GIS and streamlined landforms to interpret palaeo‐ice flow in northern Iceland

“…The M ulaj€ okull drumlins formed at the outlet of a surgetype glacier and proximal to the ice margin (Johnson et al 2010;J onsson et al 2014), which partly explains the difference in parallel conformity of landforms in central vs. northern Iceland. Drumlin density is commonly used to interpret subglacial pressure, with high-density regions being areas of low effective pressure that are favourable for Vernon 1966;Smalley & Warburton 1994). The beds of ice streams also experience very low effective pressure, which is nearly zero because the water pressure is close to the ice overburden pressure (e.g.…”

Factors Controlling the Retreat of Drumlin Coastal Cliffs in a Low Energy Marine Environment—Strangford Lough, Northern Ireland

“…The lough is formed in almost ubiquitous glacigenic sediments of Devensian age (Midlandian in Ireland) ( foreshores are formed of glacial deposits, with relatively few areas of exposed Ordovician, Silurian, and Triassic sediments; at a macroscale, the coastline is predominantly controlled by drumlin forms-either drowned, creating islands, or standing up as eroding headlands, enclosing bays and estuaries. VERNON (1966) studied the location of drumlins, the orientations of their long axes, and derived lines of ice flow in the Strangford Lough-Ards Peninsula area. The drumlin long axes are oriented in a northwest-southeast direction, and this may prove to have a bearing on the ways in which they are eroded on the shores of the lough; drumlins whose flanks face the direction of greatest wave attack may not survive as long as drumlins whose stoss or lee ends face that direction.…”