scholarly journals Sedimentological observations in middle and late Triassic rocks, Jameson Land Basin, central East Greenland

1976 ◽  
Vol 80 ◽  
pp. 106-110
Author(s):  
L.B Clemmensen ◽  
F Andreasen
Keyword(s):  
Sedimentary Basin ◽  
Late Triassic ◽  
Land Area ◽  
Detailed Measurement ◽  
East Greenland ◽  
Sedimentary Structures ◽  
Preliminary Account ◽  
Field Season

The middleand late Triassic rocks of Jameson Land and the nearby part ofthe Scoresby Land area in central East Greenland (fig. 33) were studied during the 1975 field season as part of a 2½-year joint GGU-University of Copenhagen project. The work entailed the detailed measurement of several sedimentological sections. Emphasis was laid on the primary sedimentary structures and a large number ofpalaeocurrent measurements were carried out. The ultimate goal of this approach is to understand the palaeogeographical evolution ofthe sedimentary basin during middle and late Triassic time. This note is a preliminary account and delineates only the sedimentary history ofthe basin in very broad terms.

scholarly journals A review of Palaeozoic and Mesozoic tetrapods from Greenland

2018 ◽  
Vol 66 ◽  
pp. 21-46 ◽  
Author(s):  
Marco Marzola ◽  
Octávio Mateus ◽  
Jesper Milàn ◽  
Lars B. Clemmensen
Keyword(s):  
Late Jurassic ◽  
Early Jurassic ◽  
Late Carboniferous ◽  
Late Triassic ◽  
Late Devonian ◽  
Early Triassic ◽  
Shallow Marine ◽  
East Greenland ◽  
Marine Deposits ◽  
Theropod Dinosaurs

This article presents a synthesis of Palaeozoic and Mesozoic fossil tetrapods from Greenland, including an updated review of the holotypes and a new photographic record of the main specimens. All fossil tetrapods found are from East Greenland, with at least 30 different known taxa: five stem tetrapods (Acanthostega gunnari, Ichthyostega eigili, I. stensioi, I. watsoni, and Ymeria denticulata) from the Late Devonian of the Aina Dal and Britta Dal Formations; four temnospondyl amphibians (Aquiloniferus kochi, Selenocara groenlandica, Stoschiosaurus nielseni, and Tupilakosaurus heilmani) from the Early Triassic of the Wordie Creek Group; two temnospondyls (Cyclotosaurus naraserluki and Gerrothorax cf. pulcherrimus), one testudinatan (cf. Proganochelys), two stagonolepids (Aetosaurus ferratus and Paratypothorax andressorum), the eudimorphodontid Arcticodactylus, undetermined archosaurs (phytosaurs and both sauropodomorph and theropod dinosaurs), the cynodont Mitredon cromptoni, and three mammals (Haramiyavia clemmenseni, Kuehneotherium, and cf. ?Brachyzostrodon), from the Late Triassic of the Fleming Fjord Formation; one plesiosaur from the Early Jurassic of the Kap Stewart Formation; one plesiosaur and one ichthyosaur from the Late Jurassic of the Kap Leslie Formation, plus a previously unreported Late Jurassic plesiosaur from Kronprins Christian Land. Moreover, fossil tetrapod trackways are known from the Late Carboniferous (morphotype Limnopus) of the Mesters Vig Formation and at least four different morphologies (such as the crocodylomorph Brachychirotherium, the auropodomorph Eosauropus and Evazoum, and the theropodian Grallator) associated to archosaurian trackmakers are known from the Late Triassic of the Fleming Fjord Formation. The presence of rich fossiliferous tetrapod sites in East Greenland is linked to the presence of well-exposed continental and shallow marine deposits with most finds in terrestrial deposits from the Late Devonian and the Late Triassic.

scholarly journals New perspectives on the Late Triassic vertebrates of East Greenland: preliminary results of a Polish−Danish palaeontological expedition

2014 ◽  
Vol 35 (4) ◽  
pp. 541-552 ◽  
Author(s):  
Tomasz Sulej ◽  
Andrzej Wolniewicz ◽  
Niels Bonde ◽  
Błażej Błażejowski ◽  
Grzegorz Niedźwiedzki ◽  
...  
Keyword(s):  
21St Century ◽  
Current Knowledge ◽  
Taxonomic Diversity ◽  
Trace Fossils ◽  
Skeletal Remains ◽  
Late Triassic ◽  
East Greenland ◽  
Terrestrial Vertebrates ◽  
Preliminary Results ◽  
Dinosaur Tracks

Abstract The Fleming Fjord Formation (Jameson Land, East Greenland) documents a diverse assemblage of terrestrial vertebrates of Late Triassic age. Expeditions from the turn of the 21st century have discovered many important fossils that form the basis of our current knowledge of Late Triassic Greenlandic faunas. However, due to the scarcity and incompleteness of the fossils and their insufficient study, our understanding of the taxonomic diversity of the Fleming Fjord Formation is hindered. Here, we report the preliminary findings of a Polish-Danish expedition to the Fleming Fjord Formation that took place in 2014. Three areas were visited – the fairly well known MacKnight Bjerg and Wood Bjerg and the virtually unexplored Liasryggen. MacKnigth Bjerg and Liasryggen yielded fossils which promise to significantly broaden our knowledge of vertebrate evolution in the Late Triassic. Stem-mammal remains were discovered at Liasryggen. Other fossils found at both sites include remains of actinopterygians, sarcopterygians, temnospondyl amphibians and various archosaurs (including early dinosaurs). Numerous vertebrate trace fossils, including coprolites, pseudosuchian footprints, theropod and sauropodomorph dinosaur tracks, were also discovered. Newly discovered skeletal remains as well as abundant trace fossils indicate higher tetrapod diversity in the Late Triassic of Greenland than previously thought. Trace fossils also allow inferences of early theropod and sauropodomorph dinosaur behaviour.

Fossil Plant Relative Abundances Indicate Sudden Loss of Late Triassic Biodiversity in East Greenland

Science ◽  
2009 ◽  
Vol 324 (5934) ◽  
pp. 1554-1556 ◽  
Author(s):  
J. C. McElwain ◽  
P. J. Wagner ◽  
S. P. Hesselbo
Keyword(s):  
Late Triassic ◽  
Fossil Plant ◽  
East Greenland ◽  
Sudden Loss ◽  
Relative Abundances

scholarly journals Late Triassic dinosaur tracks from Penarth, south Wales

2021 ◽  
pp. 1-12
Author(s):  
Peter L. Falkingham ◽  
Susannah C. R. Maidment ◽  
Jens N. Lallensack ◽  
Jeremy E. Martin ◽  
Guillaume Suan ◽  
...  
Keyword(s):  
United Kingdom ◽  
Late Triassic ◽  
Exposed Surface ◽  
Bearing Surface ◽  
Sedimentary Structures ◽  
South Wales ◽  
Small Fault ◽  
Dinosaur Tracks ◽  
Bedding Surface ◽  
The Uk

Abstract Evidence of Late Triassic large tetrapods from the UK is rare. Here, we describe a track-bearing surface located on the shoreline near Penarth, south Wales, United Kingdom. The total exposed surface is c. 50 m long and c. 2 m wide, and is split into northern and southern sections by a small fault. We interpret these impressions as tracks, rather than abiogenic sedimentary structures, because of the possession of marked displacement rims and their relationship to each other with regularly spaced impressions forming putative trackways. The impressions are large (up to c. 50 cm in length), but poorly preserved, and retain little information about track-maker anatomy. We discuss alternative, plausible, abiotic mechanisms that might have been responsible for the formation of these features, but reject them in favour of these impressions being tetrapod tracks. We propose that the site is an additional occurrence of the ichnotaxon Eosauropus, representing a sauropodomorph trackmaker, thereby adding a useful new datum to their sparse Late Triassic record in the UK. We also used historical photogrammetry to digitally map the extent of site erosion during 2009–2020. More than 1 m of the surface exposure has been lost over this 11-year period, and the few tracks present in both models show significant smoothing, breakage and loss of detail. These tracks are an important datapoint for Late Triassic palaeontology in the UK, even if they cannot be confidently assigned to a specific trackmaker. The documented loss of the bedding surface highlights the transient and vulnerable nature of our fossil resources, particularly in coastal settings, and the need to gather data as quickly and effectively as possible.

scholarly journals Observations on Upper Permian sediments in southern Scoresby Land, East Greenland

1980 ◽  
Vol 100 ◽  
pp. 105-107
Author(s):  
L Stemmerik
Keyword(s):  
Upper Permian ◽  
East Greenland ◽  
Field Season

Investigation of the Upper Permian sediments in Bast Greenland initiated in 1978 (Stemmerik, 1979) was continued during the field season 1979. The investigations were centred around Revdal and Schuchert Dal, but Oksedal, Depotø and Gauss Halvø were visited as well (fig. 36).

scholarly journals Glaciological activities in the Johan Dahl Land area, South Greenland, as a basis for mapping hydropower potential

1984 ◽  
Vol 120 ◽  
pp. 113-121
Author(s):  
P Clement
Keyword(s):  
Mass Balance ◽  
Water Source ◽  
Annual Runoff ◽  
Land Area ◽  
Joint Project ◽  
Hydropower Potential ◽  
Glacier Dynamics ◽  
Hydropower Production ◽  
Field Season ◽  
Inland Ice

Along the margin of the Inland Ice several basins have been proposed as possibie areas for hydropower production (ACG/VBB, 1975). ane of the most promising localities was (and still is) the Nordbosø basin in Johan Dahl Land, South Greenland. With a mean annual runoff from Nordbosø of 140 million m3 and a powerhead of 640 m, an annual production of approximately 200 GWh would result (ACG/VBB, 1980). In the Nordbosø basin Nordbogletscher is the main water source, as ablation from the glacier contributes with 60-70% of the annual runoff. An understanding of the glaciological conditions including mass balance, glacier dynamics, drainage of ice-dammed lakes, and climate-ablation relationships, is essential for the whole project. In a joint project with the Greenland Fisheries Investigations (environmental studies) and the Greenland Technical Organization (engineering and hydrological studies), GGU is responsibie for the glaciological work, and in the 1983 field season the glaciological investigations were continued for the sixth year. The project is supported by the Danish Ministry of Energy.

scholarly journals Paleomagnetism and cycle stratigraphy of the Triassic Fleming Fjord and Gipsdalen Formations of East Greenland

1996 ◽  
Vol 42 ◽  
pp. 121-136
Author(s):  
D.V. Kent ◽  
L.B. Clemmensen
Keyword(s):  
Late Triassic ◽  
Eastern North America ◽  
Stability Characteristic ◽  
East Greenland ◽  
Paleomagnetic Study ◽  
The Mean ◽  
Reversed Polarity ◽  
Formation Section ◽  
Milankovitch Orbital ◽  
Newark Basin

A 210 m section of Late Triassic Fleming Fjord Formation (the Malmros Klint Member and the lowermost 80m of the overlying Carlsberg Fjord beds of the Ørsted Dal Member) in the Tait Bjerg area of the Jameson Land Basin, East Greenland, was sampled for paleomagnetic study and measured for cycle stratigraphie analysis. Paleomagnetic samples were also taken from the underlying Gipsdalen Formation in the Gipsdalen area. A high stability characteristic magnetization carried by hematite was successfully isolated in 63 sampling levels in the Fleming Fjord Formation and 9 sampling sites in the Gipsdalen Formation using progressive thermal demagnetization. The mean characteristic directions for the Herning Fjord and the Gipsdalen Formations may be be biased by sedimentary inclination error but are consistent with a northward drift of East Greenland of about 10° from the arid (ca. 25° N) to semihumid (ca. 35° N) paleoclimatic belts in the Middle to Late Triassic. Seven normal and reversed polarity intervals are clearly delineated in the Fleming Fjord Formation section. A preferred correlation of the magnetostratigraphy to a cyclostratigraphically calibrated reference polarity sequence recently derived from drill cores in the Newark Basin of eastern North America suggests that the sampled interval represents about a 3.5 m.y. interval of the late Norian. The Malmros Klint Member and the overlying Carlsberg Fjord beds have composite sedimentary cycles that vary in thickness from 25 m to about 1 m and seem to match Milankovitch orbital climatic cyclicity with periods of ~400ky, ~100ky, ~40ky, and ~20ky. The composition and thickness ratio of the cycles suggest that the measured section of the Malmros Klint Member and the Carlsberg Fjord beds represents lacustrine accumulation over about 4 m.y., a duration consistent with the magnetostratigraphic correlations.

Sign in / Sign up

Export Citation Format

Share Document