Jökull - 01.01.2012, Blaðsíða 122

A. Schomacker et al.
Figure 7. Photographs of section 1. Ice-flow and water flow from left to right in all photos. See Figure 6 for a
sedimentary log of the section. A: Overview of the section. Spade for scale (circled). B: Bottomsets of unit 6.
Note the general coarsening upwards, and the interbeds of coarse sand. Holes result from pumice dropstones.
Ruler is 60 cm. C: Delta front and delta plain sediments, units 7 and 8, respectively. Ruler is 20 cm. D: Delta
plain sediments (sandur) of unit 8. Ruler is 20 cm. E: Close-up of the boundary between units 8 and 9. Knife
for scale. F: The heavily fissile diamict of unit 9. Knife for scale. G. The the bouldery sand of unit 12. Helmet
for scale. – Myndir af sniði 1. A: Yfirlitsmynd. Sjá jarðlagasúlu af sniðinu á mynd 6. B: Botnset, eining 6.
C: Skálög, eining 7. D: Óseyrapallset (sandur), eining 8. E: Nærmynd af mörkunum milli eininga 8 og 9.
Jökulruðningur (botnurð), eining 9. Eining 12, sandur með hnullungum.
opposite side of the river. At the base of the section,
there is an over 50 cm thick, massive, fine-to-medium-
grained, matrix-supported, clast-rich, fissile and firm
diamict interpreted as basal till (Figure 8; Krüger and
Kjær, 1999). This basal till is truncated towards the
backslope of the moraine ridge but can be traced into
the forefield beyond the moraine ridge; hence, it must
predate the moraine. Beneath the backslope surface,
an upglacier dipping slab of diamict, with the same
characteristics as the basal till, was observed. Beneath
120 JÖKULL No. 62, 2012