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Geological units indicated by key numbers in the legende



Geological units indicated by key numbers in the map legend.

[1] Sverdrup Basin (undifferentiated). Unit occurs only on Ellesmere Island, Canada.

[2] Pearya – mainly exotic terrane. Unit occurs only in northernmost Ellesmere Island, Canada.

[3] Thule Supergroup: Narssârssuk Group; Vendian.

[4] - - - : Dundas Group; late Riphean.

[5] - - - : Smith Sound, Nares Strait and Baffin Bay Groups; middle Proterozoic.

[6] Paleocene tholeiitic lavas, central West Greenland.

[7] Paleocene picritic lavas, central West Greenland.

[8] Cretaceous–Paleocene sediments, central West Greenland. Kome, Atane, Kangilia, Quikavsak, Atanikerdluk and Itilli Formations.

[9] Ordovician limestone in fault block in Archaean gneiss. Fossilik- locality, southern West Greenland (65o25´N).

[10] Phanerozoic limestones in fault block in Proterozoic reworked Archaean gneiss, southern West Greenland (66o32`N).

[11] Basaltic lavas; Eriksfjord Formation, middle Proterozoic, Gardar Province, South Greenland. Continental sandstones and conglomerates; Eriksfjord Formation, middle Proterozoic, Gardar Province, South Greenland.

[13] Pliocene–Pleistocene sand-silt deposits: Kap København Formation, central North Greenland.

[14] Paleocene–Eocene fluviatile sandstones: Thyra Ø Formation, Wandel Sea Basin, eastern North Greenland.

[15] Upper Cretaceous sandstones and shales. Herlufsholm Strand Formation and correlatives. Wandel Sea Basin, central and eastern North Greenland.

[16] Basic volcanics and volcanogenic sediments. Uppermost Cretaceous Kap Washington Group, Wandel Sea Basin, North Greenland.

[17] Upper Jurassic – Lower Cretaceous sandstones and shales. Ladegårdsåen Formation and correlatives, Wandel Sea Basin, North Greenland.

[18] Upper Permian – Middle Triassic shales and sandstones. Trolle Land Group, Wandel Sea Basin, North Greenland.

[19] Upper Carboniferous – Lower Permian carbonates. Mallemuk Mountain Group, Wandel Sea Basin, North Greenland.

[20] Lower Carboniferous sand and siltstones. Sortebakker Formation, Wandel Sea Basin, eastern North Greenland.

[21] Silurian carbonates deposited on shelf and slope areas. Washington Land Group, Franklinian Basin, North Greenland.

[22] Silurian sand and siltstones deposited in deep water turbiditic trough. Peary Land Group, Franklinian Basin, North Greenland and Ellesmere Island.

[23] Lower Cambrian – Lower Silurian carbonates from shelf and slope areas. Brønlund Fjord, Tavsen Iskappe, Ryder Gletscher and Morris Bugt Groups. Franklinian Basin, North and North-West Greenland and Ellesmere Island.

[24] Lower Cambrian – Lower Silurian mudstones and shales. Starved slope and trough deposits, Vølvedal and Amundsen Land Groups. Franklinian Basin, North Greenland and Ellesmere Island.

[25] Lower Cambrian carbonates and siliciclastic sediments. Shallow water deposits, Portfjeld and Buen Formations. Franklinian Basin, North and North-West Greenland and Ellesmere Island.

[26] Lower Cambrian calcareous mudstones and sandy turbidites. Skagen, Paradisfjeld and Polkorridoren Groups. Deep water trough deposits in the Franklinian Basin in North Greenland and on Ellesmere Island.

[27] Upper Proterozoic siliciclastic and carbonate sediments. Hagen Fjord Group, North Greenland.

[28] Uppermost Precambrian (Varangian) diamictites and sandstones. Morænesø Formation, North Greenland.

[29] Upper Proterozoic sandstones in Caledonian nappe units; Rivieradal sandstones, in part equivalent to the Hagen Fjord Group. Eastern North Greenland.

[30] Middle Proterozoic tholeiitic basalts. Zig-Zag Dal Basalt Formation, North Greenland.

[31] Lower – middle Proterozoic sandstones. Independence Fjord Group, North Greenland. Shown as middle Proterozoic on the map legend, but new age dating indicates parts are older than 1740 Ma.

[32] Tertiary (Paleocene–Eocene?) plateau basalts. East Greenland.

[33] Upper Jurassic and Lower Cretaceous shallow marine sandstones. Raukelv, Hesteelv, Lindemans Bugt and Palnatokes Bjerg Formations and Aptian–Albian sediments. East Greenland.

[34] Middle–Upper Jurassic marine sandstones and shales. Vardekløft, Olympen, Hareelv and Bernberg Formations, East Greenland.

[35] Upper Triassic – Lower Jurassic lacustrine sandstones and pelites. Kap Stewart Formation and Neill Klinter Group, East Greenland.

[36] Lower–Upper Triassic alluvial sandstones and lacustrine dolomite and shales. Pingo Dal, Gipsdalen and Fleming Fjord Formations, East Greenland

[37] Upper Permian – Lower Triassic shallow marine carbonates, sandstones and shales. Foldvik Creek and Wordie Creek Groups, East Greenland.

[38] Carboniferous – Lower Permian fluvial sandstones and shales. East Greenland.

[39] Middle–Upper Devonian continental siliciclastic sediments. Vilddal, Kap Kolthoff, Kap Graah and Celcius Bjerg Groups. East Greenland.

[40] Cambro-Ordovician dominantly limestones and dolomites in the East Greenland Caledonian fold belt. Kløftelv, Bastion, Ella Ø, Hyolithus Creek, Dolomite Point, Antiklinalbugt, Cape Weber, Narwhale Sound and Heim Bjerge Formations. East Greenland.

[41] Tillites of supposed Vendian age in isolated occurrences. East Greenland .

(42) Diamictites, sandstones, shales and dolostones in succession of Vendian age. Tillite Group in East

(43) Succession of siliciclastic, calcareous and dolomitic sediments of late Proterozoic age. Upper Eleonore Bay Supergroup including Lyell Land, Ymer Ø and Andrée Land Groups, East Greenland Caledonian fold belt.

(44) Sequence of sandstones and siltstones of late Proterozoic age. Nathorst Land Group, Lower Eleonore Bay Supergroup. East Greenland Caledonian fold belt.

[45] Middle–late Proterozoic to Early Palaeozoic? Mixed metasediments and greenstones. Exposed in tectonic windows in the East Greenland Caledonian fold belt.

[46] Middle Proterozoic metasediments in the East Greenland Caledonian fold belt. Krummedal supracrustal sequence and correlative Smallefjord sequence.

[47] Lower and Upper Tertiary siliciclastic sediments overlying Eocene basalts. East Greenland.

[48] Eocene tholeiitic plateau basalts in East Greenland.

[49] Paleocene–Eocene tholeiitic basalts with picritic intervals. East Greenland.

[50] Uppermost Cretaceous – Upper Paleocene sandstones and shales. Pre-basaltic succession in Kangerlussuaq Basin, East Greenland.

[51] Uppermost Tertiary and Quaternary basic lavas on Iceland.

[52] Migmatites and gneisses of middle Proterozoic and older origin in the East Greenland Caledonian fold belt.

[53] Tertiary felsic intrusions in East Greenland.

[54] Late to post-kinematic granitic s.l. intrusions in the East Greenland Caledonian fold belt.

[55] Middle Proterozoic augen granite intrusions, deformed during the Caledonian orogeny. East Greenland.

[56] Middle Proterozoic intrusive complexes, mainly syenites. Gardar Province, South Greenland.

[57] Tertiary mafic to intermediate intrusive complexes in East Greenland.

[58] Upper Cretaceous gabbroic intrusion. Pearya terrane, Ellesmere Island (Canada).

[59] Middle Jurassic carbonatite complex. Qaqarssuk, West Greenland.

[60] Silurian pyroxenitic intrusions in late Archaean granulite gneisses. Batbjerg complex, East Greenland.

[61] Uppermost Proterozoic carbonatite complex in Archaean gneisses. Sarfartôq, West Greenland.

[62] Early Proterozoic metasediments (marbles and siliciclastic rocks) in the Rinkian mobile belt. Karrat Group comprising the Mârmorilik, Qeqertarssuaq and Nûkavsak Formations.

[63] Early Proterozoic basic metavolcanics (Sortis Group) in the northern border zone of the Ketilidian fold belt, South-West Greenland.

[64] Early Proterozoic metasediments (Vallen Group) in the northern border zone of the Ketilidian fold belt. South-West Greenland.

[65] Early Proterozoic acid metavolcanics in the Ketilidian fold belt. South Greenland.

[66] Archaean acid metavolcanics in the Rinkian mobile belt, central West Greenland.

[67] Early Proterozoic, high grade supracrustal units (paragneiss, marbles, quartzites and basic metavolcanics) in lower Proterozoic mobile belts.

[68] Late Archaean supracrustal rocks (amphibolites and gneissic metasediments) in the Archaean craton. West Greenland and South-East Greenland.

[69] Early Archaean supracrustal sequence (Isua and Akilia sequences) in the Archaean craton, West Greenland.

[70] Early Proterozoic amphibolite facies gneiss (generally orthogneiss) dominantly of juvenile Proterozoic origin. Ketilidian fold belt, South Greenland and basement in northern part of Caledonian fold belt in East Greenland.

[71] Early Proterozoic gneiss in granulite facies. Ellesmere – Inglefield Land mobile belt, North West Greenland, Ammassalik mobile belt, East Greenland and Caledonian fold belt in North-East Greenland.

[72] Late Archaean juvenile orthogneiss in amphibolite facies. Archaean craton, West Greenland and South-East Greenland.

[73] Late Archaean juvenile orthogneiss in granulite facies. Archaean craton, West Greenland and South-East Greenland.

[74] Reworked amphibolite facies Archaean gneiss in early Proterozoic fold belts and in the basement of the southern part of the East Greenland Caledonian fold belt.

[75] Reworked granulite facies Archaean gneiss in early Proterozoic fold belts in West Greenland and in South-East Greenland.

[76] Early Archaean gneiss in the core of the Archaean craton in southern West Greenland. Amîtsoq gneiss.

[77] Early Proterozoic Rapakivi 'granites- in the Ketilidian mobile belt, South Greenland.

[78] Early Proterozoic juvenile granites of the 'Julianehåb batholith-, Ketilidian mobile belt, South Greenland ; also some granites in early Proterozoic mobile belts of southern West Greenland and South-East Greenland.

[79] Late Archaean post-tectonic granite complex. Qôrqut granite, southern West Greenland.

[80] Late Archaean granitic to tonalitic plutonic rocks. Early–late kinematic intrusions.Taserssuaq tonalite, Ilivertalik augen granite, southern West Greenland. In South-East Greenland syenitic and granitic rocks.

[81] Early Proterozoic intermediate plutonic rocks. Quartz dioritic complex in Nagssugtoqidian mobile belt, West Greenland and leuconoritic and charnockitic complex in South-East Greenland (the Ammassalik intrusive complex, ); also some units in the Caledonian fold belt in North-East Greenland.

[82] Late Archaean post-tectonic intermediate and mafic intrusions in South-East and West Greenland and North-West Greenland.

[83] Late Archaean alkaline intrusive complex. Skjoldungen alkaline province, South-East Greenland.

[84] Late Archaean carbonatite sheet. Tupertalik, southern West Greenland.

[85] Late Archaean anorthositic rocks in the Archaean craton, e.g. the Fiskenæsset complex, southern West Greenland; also in central West Greenland and in the Thule region (c. 77o30´N) North-West Greenlan.

[86] Early Proterozoic gabbro-anorthosite, East Greenland Caledonian fold belt, North-East Greenland (76oN). (Stecker & Henriksen, 1994).


Offshore areas.

(a) Areas underlain by continental crust with or without cover of sedimentary rocks and Tertiary volcanics.

(b) Transition zone between continental and oceanic crust. In many areas thought to consist of continental crust with increasing intensity of dykes and intrusions as oceanic crust is approached. Off South-West Greenland transition zone is extremely thin, continental crust interspaced with zones of serpentinised mantle peridotite.

(c-f) Areas underlain by oceanic crust, divided according to age, at 15 million year intervals. Oldest oceanic crust (f) was formed more than 45 million years ago. Divisions based on sea-floor spreading magnetic anomalies.

(g) Oceanic crust of unspecified age.


Ornamentations


Lower Tertiary volcanics at seabed, concealed. East Greenland 72o–75oN; West Greenland 68o– 73oN.



Buried volcano with high relief, East Greenland, 69oN.



Intrusions in sedimentary and volcanic rocks, East Greenland (71o– 73oN). Probably of Tertiary age.



Areas with widespread salt deposits of supposed Late Palaeozoic age. East Greenland shelf 76o30´–79o30´N.



Sedimentary basins with sediment thicknesses over 4 km. Most sediments are of Late Palaeozoic – Tertiary age.



Little known basins with thick sedimentary successions.

Ornamentation

Greenland geology. Legende