Fig. 5: Geophysical signatures of the Last Glacial Maximum at the northern Reykjanes Ridge.
From: Signatures of widespread Surtseyan volcanism at the northern Reykjanes ridge
a Regional map of western Iceland including the northern Reykjanes Ridge. Dashed lines mark the glacier extent during the last glacial maximum (LGM) at about 20 ka BP inferred from 3D thermomechanical modelling (purple18) or based on empirical data (blue and black) informed by moraines and other physical evidence19,99,100,101,102,103. b Enlargement of the study area. Blue arrows mark the outer limit of a system of a braided system of moraines15, crossed by the seismic lines (white lines) shown in (c, d). c, d Interpreted seismic profiles crossing the northern Reykjanes Ridge including the submerged volcano Nýey (c) and a prominent lava flow west of the ridge axis15 (d). The orange dotted line indicates the interpreted glacial erosion unconformity, cropping out at the seafloor where the bathymetry indicates glacial moraine complexes. Red arrow in (c) marks a ridge interpreted as a glacial moraine. Green arrows mark areas of high-reflection amplitudes at the seafloor, associated with a more hummocky seafloor marked in (b). Uninterpreted versions are included in Supplementary Fig. S5.
