Geological Survey of Denmark and Greenland Bulletin 19 ... - Geus
Geological Survey of Denmark and Greenland Bulletin 19 ... - Geus
Geological Survey of Denmark and Greenland Bulletin 19 ... - Geus
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Aaffarsuaq Mb<br />
Itilli Fm<br />
Fig. 84. Unconformity between Santonian<br />
deltaic deposits <strong>of</strong> the Atane Formation<br />
(Qilakitsoq Member) <strong>and</strong> Campanian<br />
turbidite s<strong>and</strong>stones <strong>and</strong> conglomerates <strong>of</strong><br />
the Aaffarsuaq Member (Itilli Formation).<br />
East-side <strong>of</strong> Tunoqqu. For location, see<br />
Fig. 82.<br />
Qilakitsoq Mb<br />
Atane Fm<br />
to more than 5 m thick <strong>and</strong> are commonly separated by<br />
thin mudstone beds (Figs 83, 85). The s<strong>and</strong>stones are<br />
mostly structureless, whereas the conglomerates show<br />
considerable lateral variation, are poorly sorted, <strong>and</strong><br />
always have a coarse-grained s<strong>and</strong>y matrix. Both matrix<strong>and</strong><br />
clast-supported conglomerates occur. The clasts consist<br />
<strong>of</strong> intraformational mudstone, s<strong>and</strong>stone (probably<br />
derived from the underlying Atane Formation), concretions<br />
<strong>and</strong> basement lithologies (Dam et al. 2000).<br />
The amalgamated s<strong>and</strong>stone <strong>and</strong> conglomerate units<br />
are overlain by thinly interbedded s<strong>and</strong>stone <strong>and</strong> mudstone<br />
units with either a gradational or a sharp contact.<br />
These units are up to 30 m thick <strong>and</strong> show a general thinning-<br />
<strong>and</strong> fining-upward trend (Figs 83, 85). They consist<br />
<strong>of</strong> laterally persistent, normally-graded,