III.—A Gravity Survey of a Glacier-dammed Lake in North Greenland

1958 ◽  
Vol 67 (1) ◽  
pp. 42-53
Author(s):  
C. Bull
Keyword(s):  
Lake Level ◽  
Bouguer Anomaly ◽  
Gravity Survey ◽  
Contour Map ◽  
East Greenland ◽  
North East ◽  
Local Topography ◽  
Lake Bottom ◽  
Dammed Lake ◽  
North Greenland

SynopsisA gravity survey has been made of a glacier-dammed lake in Dronning Louise Land, North-East Greenland. Corrections for the effect of the local topography and the regional Bouguer anomaly are made to the values of the acceleration due to gravity measured at about 230 points on the lake and its shores. From the differences between the corrected values at the lake stations and those of the shores, depths of water under the lake stations are calculated, and a contour map of the lake bottom is drawn. A submerged shelf, 75 metres below the present lake level, persists around the western part of the lake. This may be the shore-line of a pre-glacial lake.

An outer shelf shelly fauna from Cambrian Series 2 (Stage 4) of North Greenland (Laurentia)

2021 ◽  
Vol 95 (S83) ◽  
pp. 1-41
Author(s):  
John S. Peel
Keyword(s):  
New York ◽  
New Species ◽  
North America ◽  
World Wide ◽  
Wide Distribution ◽  
East Greenland ◽  
North East ◽  
Small Shelly Fossils ◽  
Stage 4 ◽  
North Greenland

AbstractAn assemblage of 50 species of small shelly fossils is described from Cambrian Series 2 (Stage 4) strata in North Greenland, the present day northernmost part of the paleocontinent of Laurentia. The fossils are derived from the basal member of the Aftenstjernesø Formation at Navarana Fjord, northern Lauge Koch Land, a condensed unit that accumulated in a sediment-starved outer ramp setting in the transarctic Franklinian Basin, on the Innuitian margin of Laurentia. Most other small shelly fossil assemblages of similar age and composition from North America are described from the Iapetan margin of Laurentia, from North-East Greenland south to Pennsylvania. Trilobites are uncommon, but include Serrodiscus. The Australian bradoriid Spinospitella is represented by a complete shield. Obolella crassa is the only common brachiopod. Hyoliths, including Cassitella, Conotheca, Neogloborilus, and Triplicatella, are abundant and diverse, but most are represented just by opercula. Sclerites interpreted as stem-group aculiferans (sachitids) are conspicuous, including Qaleruaqia, the oldest described paleoloricate, Ocruranus?, Inughuitoconus n. gen., and Hippopharangites. Helcionelloid mollusks are diverse, but not common; they are associated with numerous specimens of the bivalve Pojetaia runnegari. The fauna compares best with that of the upper Bastion Formation of North-East Greenland, the Forteau Formation of western Newfoundland, and the Browns Pond Formation of New York, but several taxa have a world-wide distribution. Many specimens are encrusted with crystals of authigenic albite. New species: Anabarella? navaranae, Stenotheca? higginsi, Figurina? polaris, Hippopharangites groenlandicus, Inughuitoconus borealis, and Ocruranus? kangerluk.UUID: http://zoobank.org/160a17b1-3166-4fcf-9849-a3cabd1e04a3

Chapter 16 Devonian history

1997 ◽  
Vol 17 (1) ◽  
pp. 289-309 ◽  
Author(s):  
W. Brian Harland
Keyword(s):  
Early Devonian ◽  
East Greenland ◽  
Red Sandstone ◽  
North East ◽  
The North ◽  
Fossil Fish ◽  
Red Bay ◽  
The Many ◽  
Orogenic Events ◽  
North Greenland

Svalbard is part of the Old Red Sandstone province with affinities in East Greenland, Norway, Appalachian North America and, of course, the British Isles where the Devonian Period was defined. This allows Devonian history in this region, controlled by Caledonian events, to form a neat and natural chapter, though not necessarily a global one. Old Red Sandstone environments in each area were already becoming established in Late Silurian time. Olaf Holtedahl was the prime author of both Caledonian tectogenesis in Svalbard and the Old Red Sandstone aftermath.Of the many and varied biotas of Svalbard the fossil fish have made remarkable and classic contributions to Spitsbergen geology.The earliest 'Old Red Sandstone' Spitsbergen strata have yet to yield evidence of age and so may be latest Silurian (Siktefjellet Group). But the earliest Devonian strata to be identified biostratigraphically begin with the Red Bay Group. Similarly the (major) Ny Friesland Orogeny and the various late orogenic granite emplacements, while initially Silurian, continued at least to cool in Devonian time. For convenience the orogenic events that may continue as early Devonian are treated in the Silurian chapter and the sedimentary events that may be Silurian are treated here.Devonian successions in Svalbard are known only from terranes which are postulated to have originated from the North East Greenland Province. No record has yet been established for Devonian strata in Svalbard either from the eastern terranes (East Greenland Province) or from the western terranes (North Greenland-Pearya Province). Moreover, the East Greenland succession lacks

scholarly journals Jurassic dinoflagellate cysts from Hochstetter Forland, North-East Greenland

2004 ◽  
Vol 5 ◽  
pp. 89-97 ◽  
Author(s):  
Stefan Piasecki ◽  
Lars Stemmerik
Keyword(s):  
Dinoflagellate Cysts ◽  
East Greenland ◽  
North East ◽  
Upper Callovian ◽  
North Greenland

Three sections in Hochstetter Forland, North-East Greenland, referred to the Jurassic Payer Dal and Bernbjerg Formations, have been analysed for dinoflagellate cysts. The dinoflagellate cysts, new finds of ammonites and previously recorded marine faunas form the basis for improved dating of the succession. The basal strata of the Payer Dal Formation at Kulhus is here dated as Late Callovian, Peltoceras athleta Chronozone, based on the presence of relatively abundant Limbicysta bjaerkei, Mendicodinium groenlandicum, Rhychoniopsis cladophora and Tubotuberella dangeardii in an otherwise poor Upper Callovian dinoflagellate assemblage. Ammonites have not been recorded from these strata. The upper Payer Dal Formation at Agnetesøelven is dated as Late Oxfordian, Amoeboceras glosense – Amoeboceras serratum Chronozones, based on the presence of Sciniodinium crystallinum, together with Cribroperidinium granuligera and Stephanelytron sp. The age is in accordance with ammonites present in the uppermost part of the formation at Søndre Muslingebjerg. New ammonites in the Bernbjerg Formation at Agnetesøelven together with dinoflagellate cysts indicate an earliest Kimmeridgian age, Rasenia cymodoce and Aulacostephanoides mutabilis Chronozones. The Upper Callovian dinoflagellate cysts from Hochstetter Forland belong to a local brackish to marginal marine assemblage, which only allows a fairly broad correlation to coeval assemblages in central East Greenland. In contrast, the Oxfordian and Kimmeridgian assemblages are fully marine and can be correlated from Milne Land in central East Greenland via Hochstetter Forland to Peary Land in eastern North Greenland.

scholarly journals 14C-dating of samples collected during the 1979 expedition to North Greenland

1982 ◽  
Vol 110 ◽  
pp. 9-14
Author(s):  
S Funder
Keyword(s):  
Geological Survey ◽  
14C Dating ◽  
East Greenland ◽  
Radiocarbon Age ◽  
Carbon 14 ◽  
North East ◽  
Two Samples ◽  
North Greenland ◽  
Land Region ◽  
Age Determinations

Thirty-two radiocarbon age determinations of bivalve shelIs (30), gyttja (1) and peat (1) are summarised below. All but two of the samples were collected during the GGU geological expedition to the Peary Land region. Two samples comprise contemporary shelIs from north and north-east Greenland, and were collected earlier. The samples have been dated at the Carbon-14 Dating Laboratory of the Geological Survey of Denmark and the National Museum, Copenhagen (samples marked K, by courtesy of the Geological Survey of Denmark), the C-14 Laboratory at the Department of Quatemary Geology, University of Lund, Sweden (samples marked Lu, by courtesy of the laboratory and the Department of Quatemary Geology, University of Lund), and the Harwell Carbon 14/Tritium Laboratory, AERE, England (samples marked HAR).

Tectono-stratigraphic history of northern Amdrup Land, eastern North Greenland: implications for the northernmost East Greenland shelf

2000 ◽  
pp. 167-191
Author(s):  
Lars Stemmerik ◽  
Birgitte D. Larsen ◽  
Finn Dalhoff
Keyword(s):  
Plate Boundary ◽  
Southern Limit ◽  
East Greenland ◽  
North East ◽  
The North ◽  
Upper Proterozoic ◽  
Structural Style ◽  
History Of ◽  
Land Changes ◽  
North Greenland

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Stemmerik, L., Larsen, B. D., & Dalhoff, F. (2000). Tectono-stratigraphic history of northern Amdrup Land, eastern North Greenland: implications for the northernmost East Greenland shelf. Geology of Greenland Survey Bulletin, 187, 167-191. https://doi.org/10.34194/ggub.v187.5192 _______________ The NW–SE-oriented Sommerterrasserne fault in Amdrup Land marks the southern limit of Mesozoic compression related to the transform plate boundary between North Greenland and Svalbard. Structural style in Amdrup Land changes across the fault; Carboniferous, Permian and Jurassic sediments in northern Amdrup Land north-east of the fault are gently folded, with NE– SW-trending fold axes, whereas they are gently dipping south of the fault. The Sommerterrasserne fault is regarded as the south-eastern extension of the Trolle Land fault zone of eastern Peary Land. Upper Moscovian carbonates of the Foldedal Formation rest unconformably on isoclinally folded Upper Proterozoic sediments of the Independence Fjord Group in northern Amdrup Land and are conformably overlain by chert-rich limestones of the Permian Kim Fjelde and Midnatfjeld Formations. Locally, up to 70 m of Jurassic sandstone and siltstone are preserved in the axes of the synclines, resting conformably on Permian limestones; the folding thus post-dates their deposition. The folding of the sediments to the north-east of the Sommerterrasserne fault most likely took place during the latest Cretaceous; it is post-dated by a post- Paleocene extensional event.

scholarly journals Calculated Patterns of Accumulation on the Greenland Ice Sheet

1967 ◽  
Vol 6 (48) ◽  
pp. 795-803 ◽  
Author(s):  
Steven J. Mock
Keyword(s):  
Mass Balance ◽  
Transition Zone ◽  
Ice Sheet ◽  
Greenland Ice Sheet ◽  
East Greenland ◽  
North East ◽  
The North ◽  
Regression Techniques ◽  
Independent Parameters ◽  
North Greenland

All available mean annual accumulation data on the Greenland ice sheet (excluding the Thule peninsula) have been collected and analyzed using multiple regression techniques to develop equations capable of predicting mean annual accumulation. The analysis was carried out for north Greenland, south Greenland, and for the transition zone between the two major regions. The resulting equations show that mean annual accumulation can be predicted from the independent parameters latitude, longitude and elevation. The patterns of accumulation are shown in a series of isohyetal (contours of accumulation in terms of water) maps. The major feature shown is a well defined asymmetry in accumulation; a pronounced east-slope maximum in south Greenland and an equally pronounced west-slope maximum in north Greenland. Poleward of lat. 69° N., isohyets decrease in elevation to the north. Mean annual accumulation ranges from >90 g./cm.2in south-east Greenland to <15 g./cm.2in north-east Greenland. A brief discussion of mass balance estimates of the Greenland ice sheet and of the relevance of this study to them is included.

Systematics and biogeography of some early Cambrian (Series 2) bradoriids (Arthropoda) from Laurentia (Greenland)

2017 ◽  
Vol 54 (9) ◽  
pp. 961-972 ◽  
Author(s):  
John S. Peel
Keyword(s):  
New Brunswick ◽  
Middle Latitude ◽  
Carbonate Ramp ◽  
Early Cambrian ◽  
Low Latitude ◽  
East Greenland ◽  
North East ◽  
Stage 4 ◽  
First Time ◽  
North Greenland

Bradoriid arthropods are described from the Kap Troedsson and Henson Gletscher formations of North Greenland and the Bastion Formation of North-East Greenland (Cambrian Series 2, Stage 4). Hipponicharion skovstedi n. sp. and Beyrichona avannga n. sp. represent species of genera originally described from Avalonia (New Brunswick) that are characteristic of middle-latitude assemblages in the early Cambrian. They are described for the first time from low-latitude environments in the early Cambrian of Laurentia where they occur together in a middle to upper carbonate ramp succession. Navarana n. gen. is proposed for a rare hipponicharionid currently known only from North Greenland.

scholarly journals The problematic fossil Mongolitubulus from the Lower Cambrian of Greenland

2001 ◽  
Vol 48 ◽  
pp. 135-147
Author(s):  
Christian B. Skovsted ◽  
John S. Peel
Keyword(s):  
Lower Cambrian ◽  
Type Species ◽  
East Greenland ◽  
North East ◽  
North Greenland

Spines referred to the problematic phosphatic Small Shelly Fossil Mongolitubulus Missarzhevsky, 1977 are described from the Lower Cambrian of Greenland. The type species, M. squamifer, is reported from the Henson Gletscher Formation of North Greenland, while M. henrikseni sp. nov. is described from the Bastion Formation of North-East Greenland. Co-occurring small plates with broken spine bases suggest that Mongolitubulus henrikseni may have been a bivalved(?) arthropod with a carapace bearing multiple spines, but it is uncertain if this restoration can be extended to the type species.

scholarly journals C14 dating of survey material carried out in 1977

1978 ◽  
Vol 90 ◽  
pp. 119-124
Author(s):  
A Weidick
Keyword(s):  
Field Work ◽  
Geological Survey ◽  
East Greenland ◽  
North West ◽  
Radiocarbon Age ◽  
Carbon 14 ◽  
Geodetic Institute ◽  
North East ◽  
North Greenland ◽  
Age Determinations

Fourty-two radiocarbon age determinations of shell samples (27), wood (2) and gyttja (13) from North-West, North, East, and South Greenland are summarised below. All the material was collected during GGU field work in recent years. The samples have been dated by the Geological Survey of Canada, Ottawa (marked GSC), Isotopes Inc., Westwood, New Jersey, USA (marked I) and the Carbon-14 Dating Laboratory of the Geological Survey of Denmark and the National Museum, Copenhagen (marked K). The samples in North-West, South and East Greenland are located by the coordinates from the Danish Geodetic Institute maps; in North Greenland coordinates are from the U.S.A.F. World Aeronautical Chart 1:1000000, 5th edition.

scholarly journals Calculated Patterns of Accumulation on the Greenland Ice Sheet

1967 ◽  
Vol 6 (48) ◽  
pp. 795-803 ◽  
Author(s):  
Steven J. Mock
Keyword(s):  
Mass Balance ◽  
Transition Zone ◽  
Ice Sheet ◽  
Greenland Ice Sheet ◽  
East Greenland ◽  
North East ◽  
The North ◽  
Regression Techniques ◽  
Independent Parameters ◽  
North Greenland

All available mean annual accumulation data on the Greenland ice sheet (excluding the Thule peninsula) have been collected and analyzed using multiple regression techniques to develop equations capable of predicting mean annual accumulation. The analysis was carried out for north Greenland, south Greenland, and for the transition zone between the two major regions. The resulting equations show that mean annual accumulation can be predicted from the independent parameters latitude, longitude and elevation. The patterns of accumulation are shown in a series of isohyetal (contours of accumulation in terms of water) maps. The major feature shown is a well defined asymmetry in accumulation; a pronounced east-slope maximum in south Greenland and an equally pronounced west-slope maximum in north Greenland. Poleward of lat. 69° N., isohyets decrease in elevation to the north. Mean annual accumulation ranges from >90 g./cm.2 in south-east Greenland to <15 g./cm.2 in north-east Greenland. A brief discussion of mass balance estimates of the Greenland ice sheet and of the relevance of this study to them is included.

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