First age-diagnostic fossils from the central part of the North Greenland foldbelt

Surlyk, Finn; Hurst, John M.; Bjerreskov, Merete

doi:10.1038/286800a0

Cited by 51 publications

(52 citation statements)

References 3 publications

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“…Carbonate sedimentation with evaporites dominated in the basins of northern Canada (Trettin & Balkwill 1979;Trettin 1987Trettin , 1989Trettin , 1994Trettin , 1998Trettin et al 1987;Long 1989;Estrada et al 2003). Some of the Lower Ordovician sections are very thick, up to 2000 m (Surlyk et al 1980). Evaporites and carbonates were also deposited in the Michigan Basin (Kolata et al 2001).…”

Section: -14mentioning

confidence: 99%

“…In the Iapetus margin zones the thickness of deposits gradually increases to 1000 -1500 m (Brett et al 1990;Keppie et al 1997;Schulz et al 2008). The thickness of the Middle Ordovician rocks in the Peri-Innuitian zone and the eastern part of Greenland is more than 1000 m (McGill 1974;Henriksen 1978;Trettin & Balkwill 1979;Surlyk et al 1980;Trettin 1987Trettin , 1989Trettin , 1994Trettin , 1998Trettin et al 1987;Long 1989;Henriksen & Higgins 2000;Estrada et al 2003;Smith et al 2004). The seawater salinity increased in the Caradocian and gypsum and anhydrites were deposited.…”

Section: -14mentioning

confidence: 99%

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Chapter 6 Phanerozoic palaeoenvironment and palaeolithofacies maps of the Arctic region

Golonka

2011

Memoirs

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Sixty-three maps illustrate geodynamic evolution and development of palaeoenvironments and palaeolithofacies of the Circum-Arctic region during Phanerozoic times. After the break-up of Rodinia and Pannotia in the Early Palaeozoic, the major Arctic plates Baltica, Siberia and Laurentia drifted from their original position around the South Pole towards the Supercontinent Pangea, which existed in the equatorial position during Late Palaeozoic and Early Mesozoic times. During the Mesozoic and Cenozoic plates gathered around newly formed Arctic Ocean. Large continental masses were assembled from major plates and numerous small plates and terranes on the northern hemisphere and around the North Pole. All the continents were by now connected. Carbonates were abundant in Siberia and Laurentia during Palaeozoic times. Clastic sedimentation prevailed during Mesozoic and Cenozoic times. The distribution of lithofacies shows climatic change associated with continental assembly and disassembly as well as with the steady northward drift of the continents.

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Section: -14mentioning

confidence: 99%

Section: -14mentioning

confidence: 99%

Chapter 6 Phanerozoic palaeoenvironment and palaeolithofacies maps of the Arctic region

Golonka

2011

Memoirs

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“…The change in deposition rate has been linked to uplift and erosion to the east associated with the beginning of the Caledonian orogeny. There is no direct age determination for the Sydgletcher Formation; however, Surlyk et al (1980) reported early Llandovery-age graptolites in underlying shales. Overlying turbidites of the Merqujôq Formation contain late Llandovery graptolites (Hurst and Surlyk, 1982), bracketing the Sydgletcher Formation within the Llandovery (443.4 Ma to 433.4 Ma).…”

Section: Geological Backgroundmentioning

confidence: 99%

Orogenic paleofluid flow recorded by discordant detrital zircons in the Caledonian foreland basin of northern Greenland

2015

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Concordant detrital zircon dates from Neoproterozoic to Paleozoic continental slope and trough deposits in northern Greenland indicate Late Archean and Paleoproterozoic sediment sources. Significant numbers of dates are, however, discordant and, together with a few apparently concordant dates, give ages younger than the depositional ages of overlying fossiliferous sediments. The discordance pattern implies partial or total radiogenic-Pb loss during the Middle Devonian, possibly facilitated by postdepositional fluid movement. Such timing of radiogenic-Pb loss is supported by results from a novel modeling method, which indicate that the greatest statistical similarity between concordant and discordant detrital populations occurs when Pb loss is constrained to the interval of 380-390 Ma, i.e., long after deposition. This radiogenic-Pb loss event is interpreted to reflect fluid flow associated with Caledonian orogenic uplift to the east.

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“…Hills & Thomas 1954;Schleiger 1968;Moors 1969). In N Greenland a model for Lower Palaeozoic sedimentation in the trough, slope and platform environments was reported in Surlyk et al (1980) and has recently been worked out in detail, especially for the Silurian flysch sequences (Hurst & Surlyk 1982). This refined sedimentological model for the N Greenland Silurian deposits offers a unique possibility for correlating the graptolite faunas with the different sedimentary facies.…”

Section: Graptolites and Their Relation To The Sedimentary Environmentsmentioning

confidence: 97%

“…The following summary of the geology of N Greenland is based on the descriptions in Surlyk et al (1980) and Hurst & Surlyk (1982). The northernmost part of N Greenland comprises a 600 km long E-W-trending Palaeozoic foldbelt (Fig.…”

Section: Geology Of N Greenlandmentioning

confidence: 99%

Silurian graptolites from N Greenland

Bjerreskov

1986

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Summary Recent collections of Silurian graptolites from N Greenland have yielded much new information on the biostratigraphy of the area. The graptolites occur mainly in slope and trough sediments, some of which are now incorporated in the N Greenland foldbelt. The full sequence of graptolite zones established in Britain cannot be recognized. The oldest Silurian graptolites indicate a lower Llandovery atavus or cyphus Zone age and above this an intermittent succession of graptolite faunas are found throughout the Llandovery, Wenlock, Ludlow and into the Pridoli ( transgrediens Zone only). There are differences between the zones recognized in the western and eastern parts of N Greenland. The spiralis Zone appears to be the most extensive, occurring all over N Greenland. The graptolite sequences in N Greenland correspond most closely with those reported from the nearby Canadian Arctic Archipelago, but are easily correlated with the graptolite faunas from the Cordillera region, especially from the northern part. Differences of faunal assemblages are tentatively correlated with changes in sedimentary environments, possibly indicating a difference in the spatial distribution of species in a living graptolite community.

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First age-diagnostic fossils from the central part of the North Greenland foldbelt

Cited by 51 publications

References 3 publications

Chapter 6 Phanerozoic palaeoenvironment and palaeolithofacies maps of the Arctic region

Chapter 6 Phanerozoic palaeoenvironment and palaeolithofacies maps of the Arctic region

Orogenic paleofluid flow recorded by discordant detrital zircons in the Caledonian foreland basin of northern Greenland

Silurian graptolites from N Greenland

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