Geological Survey of Denmark and Greenland Bulletin 19 ... - Geus

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Eqalulik Formation Kangilia Formation Fig. 118. Exposure of the Eqalulik Formation overlying the Kangilia Formation at Kangilia. The photo shows the lower c. 20 m of the formation; for location, see Fig. 74. Thickness. On the north coast of Nuussuaq, the formation ranges from 100 to 160 m thick, in Agatdalen it is approximately 12 m thick (H.J. Hansen 1970), and in Aaffarsuaq it is less than 20 m in thickness. In the GANE#1A well, the formation is 102 m thick and it is 218 m thick in the GANK#1 well. The very variable thickness of the formation is the result of varying proportions of tuffaceous material (the presence of which defines the formation) and intensive loading and deformation of the mudstones by prograding thick lobes of submarine basaltic breccia beds. Lithology. The formation comprises mudstones, tuff beds and volcaniclastic sandstones; the latter lithologies are essential to the definition of the formation (Fig. 122). Internal structures in the mudstones cannot be recognised due to poor exposure. The thicker sandstone units consist of amalgamated graded beds composed of fine- to very coarse-grained, volcaniclastic sandstones with scattered pebble-sized volcanic and mudstone clasts. Parallel lamination, current cross-lamination and dish structures have locally been observed within the graded beds. In some areas volcanic material may constitute up to 25% of the section (A.K. Pedersen 1978) and fossils are common (Rosenkrantz 1970; Floris 1972). The tuff beds are up to 7 m thick at Kangilia, and tuff beds up to several metres thick are also seen in Danienkløft (Tunorsuaq) and in Koralkløft (Ilugissoq; Figs 2, 74). Most of these tuff beds contain scleractinian corals; these are without preferred orientation, but only slightly worn (Floris 1972). In the GANE#1 well the formation consists of mudstones, interbedded quartz-rich, siliciclastic and volcaniclastic sandstones and mudstones, muddy sandstones and chaotic beds (Dam 1996b). Volcanic clasts and rounded basement pebbles and angular mudstone ripup clasts are common, and concretions and plant debris are locally present (Fig. 119). Several thinning- and fining-upward successions have been recognised in the core. These are sharply based and consist of amalgamated normally graded, very coarse- to coarse-grained sandstone beds passing upwards into thinly interbedded sandstones and mudstones. Occasionally the sandstone beds are internally stratified, showing parallel-lamination or crosslamination, dish structures and soft sediment folds. Sandstones are occasionally burrowed and escape burrows 134
GANE#1 Vaigat Fm Anaanaa Mb m Hyaloclastites 500 GANE#1A Eqalulik Formation 550 m 550 600 600 First appearance of hyaloclastite clasts Agatdal Formation 640 vf clay si f m c vc sand pb 650 Fig. 119. Type section of the Eqalulik Formation in the GANE#1 and 1A wells on western Nuussuaq. For location, see Fig. 65; for legend, see Plate 1. 700 vf clay si f m c vc sand pb 135
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GEOLOGICAL SURVEY OF DENMARK AND GR
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Contents Abstract . . . . . . . . .
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Preface The onshore Cretaceous-Pale
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Introduction The Nuussuaq Basin bel
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chemistry of the Nuussuaq Basin hav
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Fig. 5. Plant fossils from the Atan
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Peak 2010 m Peak 1900 m Peak 1760 m
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A lithostratigraphy for the marine
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to provide further funding for stud
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DGR Geological setting As a result
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TSS 8 Agatdal Fm Eqalulik Fm Kangil
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A Svartenhuk Halvø 50 km B Hinterl
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Nuussuaq Group new group History. T
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ley (Figs 2, 40, 65). The section a
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Central Nuussuaq Agatdalen South co
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3 10 4 6 5 Qorlortorssuaq Slibesten
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volcanic sediments are referred to
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Fig. 20. View from Uummannaq toward
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In the Kuuk area, the sediments ove
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m m 15 14 14 13 12 11 10 9 8 7 6 5
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Kome Formation m 40 30 20 D tial re
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Fig. 28. Reference locality of the
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Vaigat Fm Vesterfjeld Slibestensfje
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Gilbert delta in the Ikorfat area (
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150 300 450 100 250 400 m 550 50 20
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Fig. 36. Outcrop of the Upernivik N
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Correlation. The Upernivik Næs flo
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12’ 09’ 15’ 06’ 03’ Saqqa
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m 0 GGU 247801 200 400 247815 ★
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wave-rippled sand streaked mudstone
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the formation in the marine mudston
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d d Fig. 47. Type locality of the S
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Fig. 49. Cross-bedded medium- to co
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and Qaarsut (Fig. 22). Its wider di
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Fig. 52. Two closely spaced section
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Type section. The type section of t
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Fig. 56. Delta front succession of
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Fig. 59. The Kingittoq Member at Ki
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sh L sh ch delta front Vaigat Forma
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Fig. 63. Type locality of the Itivn
Page 83 and 84: 782 Quaternary cover 54° 888 Malig
Page 85 and 86: Kuugannguaq-Qunnilik Fault and is o
Page 87 and 88: and include clasts of intraformatio
Page 89 and 90: deposited in a base-of-slope and ba
Page 91 and 92: VK 53°30’ 53°15’ Niaqornat Tu
Page 93 and 94: Umiivik-1 m Overburden ★ ★ No p
Page 95 and 96: 76). Heavily bioturbated interbedde
Page 97 and 98: Fig. 78. Type locality of the Kussi
Page 99 and 100: A B Itilli Formation Kussinerujuk M
Page 101 and 102: 160 140 120 100 Vaigat Formation Eq
Page 103 and 104: Fig. 85. Mudstones and conglomerati
Page 105 and 106: Fig. 87. Type section of the Kangil
Page 107 and 108: m 150 140 130 120 110 100 90 Kangil
Page 109 and 110: channellised, high-density currents
Page 111 and 112: Thickness. The Annertuneq Conglomer
Page 113 and 114: Fig. 96. A: Type locality of the Oy
Page 115 and 116: On Svartenhuk Halvø, on the east s
Page 117 and 118: Fig. 100. Reference locality of the
Page 119 and 120: Tupaasat Member Atane Formation Fig
Page 121 and 122: ever, have a fluvio-lacustrine orig
Page 123 and 124: etween Tupaasat and Nuuk Qiterleq a
Page 125 and 126: Vaigat Formation sill Quikavsak For
Page 127 and 128: Fig. 112. The sharp boundary betwee
Page 129 and 130: Agatdal Formation Eqalulik Formatio
Page 131 and 132: Fig. 116. Basal conglomerate unit o
Page 133: heterolithic deposits of the Kangil
Page 137 and 138: Fig. 121. Well reference section of
Page 139 and 140: Pedersen 1978). The beds are usuall
Page 141 and 142: In detail, however, the boundary be
Page 143 and 144: Fig. 126. Composite type section of
Page 145 and 146: m m 240 340 m Pingu Member 230 230
Page 147 and 148: Naujât Member Atane Formation, Kin
Page 149 and 150: The TOC [Total Organic Carbon] cont
Page 151 and 152: Fig. 133. Correlation of the member
Page 153 and 154: Fig. 135. Type locality of the Ping
Page 155 and 156: Fig. 137. Lower, sharp boundary of
Page 157 and 158: m 130 125 110 t t invasive lava low
Page 159 and 160: Fig. 141. Upper part of the Assoq M
Page 161 and 162: Brown, R. 1875: Geological notes on
Page 163 and 164: a rosetted spreite trace fossil: Da
Page 165 and 166: ing bark from the Nûgssuaq peninsu
Page 167 and 168: 1998: The syn-volcanic Naajaat lake
Page 169 and 170: Appendix: Place names and localitie
Page 171: Place name Place name P Paatuut sou
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Geological Survey of Denmark and Greenland Bulletin 19 ... - Geus

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