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

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Eqalulik Fm m 150 140 Paatuutkløften 150 Ippigaarsukkløften m Fig. 108. Type and reference sections of the Paatuutkløften Member at Paatuutkløften and Ippigaarsukkløften, respectively (for location, see Fig. 40; for legend, see Plate 1). The dashed lines indicate correlative surfaces between the two sections. 130 140 Terminal lobe 120 130 110 120 100 110 Quikavsak Formation Paatuutkløften Member 90 80 70 100 90 80 60 50 70 60 Hydrothermal fracture 40 50 30 40 20 30 10 20 Atane Fm 0 cl si sand pebbles Base of incised valley 10 0 cl si sand pebbles 124
Vaigat Formation sill Quikavsak Formation Atane Formation Fig. 109. Paatuutkløften Member as exposed in the Ippigaarsukkløften section (for location, see Fig. 40). The sandstones of the Paatuutkløften Member fill a valley incised into deltaic deposits of the Atane Formation (see Fig. 108). Thickness of valley fill is c. 180 m; the white arrow indicates the base of the reference section shown in Fig. 108. light orange in the upper part of the member and crossbeds show double mud drapes and reactivation surfaces draped by mudstone clasts. Locally the cross-bedding is bidirectional. The sandstones frequently show convolute bedding; coal fragments, sideritic mudstone clasts and concretions are common. Thin mudstone beds with plant debris and heavily bioturbated sandstones occur in the upper part of the succession. Fossils. Few recognisable plant fossils are present in the mudstones of the member. On the spur between the western slope of the Ippigaarsukkløften ravine and the coastal slope, about 5 m below the basalts, a few Danian marine molluscs have been found (Koch 1959). Danian oysters (Ostrea sp.) have been found immediately west of Paatuutkløften and east of Nuuk Killeq (Fig. 2; Koch 1959). These oysters were most probably derived from sandstones in the uppermost part of this member. Trace fossils are common to abundant at most localities in the upper part of the member. They include Ophiomorpha nodosa, Ophiomorpha isp., Diplocraterion parallelum and Thalassinoides isp. (Fig. 108). Depositional environment. The sediments of the Paatuut - kløften Member were deposited in an incised valley system formed after an episode of renewed Early Paleocene faulting. The valley system seems to follow the system generated prior to the deposition of the Tupaasat Member, resulting in considerable or in some cases complete erosion of the earlier deposits within the incised valleys. Deposition of the lower part of the member took place in a fluvial environment during a period of rapidly rising sea level, high river discharge and high sedimentation rates (Koch 1959; Dam & Sønderholm 1998; Dam 2002). The upper part of the member is characterised by a change in colour, by sedimentary structures typical of tidal activity and by intense bioturbation, indicating a change to a tidal estuarine environment during infilling of the valleys (Dam & Sønderholm 1998). 125
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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
Page 73 and 74: Type section. The type section of t
Page 75 and 76: Fig. 56. Delta front succession of
Page 77 and 78: Fig. 59. The Kingittoq Member at Ki
Page 79 and 80: sh L sh ch delta front Vaigat Forma
Page 81 and 82: 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: etween Tupaasat and Nuuk Qiterleq a
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 and 134: heterolithic deposits of the Kangil
Page 135 and 136: GANE#1 Vaigat Fm Anaanaa Mb m Hyalo
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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