Trace fossils from the Lower Cambrian Bastion Formation of North-East Greenland

New trace fossil collections are described from Lower Cambrian siliciclastic shallow marine shelf deposits of the Bastion Formation of North-East Greenland, together with a taxonomic re-assessment of previously reported material. The entire assemblage comprises 19 ichnogenera, 25 ichnospecies, as well as two vernacular ichnotaxa. Although no new ichnotaxa are present the material reveals new information on the 3-dimensional structure of two of the contained ichnogenera, namely Plagiogmus Roedel and Psammichnites TorelI. The stratigraphic range of a single ichnospecies, Rusophycus latus Webby, is formally extended from the Lower Ordovician to the Lower Cambrian. The assemblage compares favourably with Lower Cambrian ichnocoenoses described from other continents, particularly at the ichnogeneric level. Comparison with similar sequences suggests that the sub-trilobitic Lower Bastion Formation is late Tommotian to early Atdabanian in age, possibly entirely Atdabanian.

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Trace fossils from the lower Cambrian Kløftelv Formation, Ella Ø, North-East Greenland

GFF ◽

10.1080/11035897.2015.1076029 ◽

2015 ◽

Vol 138 (3) ◽

pp. 369-376 ◽

Cited By ~ 2

Author(s):

Sören Jensen ◽

David A.T. Harper ◽

Svend Stouge

Keyword(s):

Lower Cambrian ◽

Trace Fossils ◽

East Greenland ◽

North East

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The problematic fossil Triplicatella from the Early Cambrian of Greenland, Canada, and Siberia

Canadian Journal of Earth Sciences ◽

10.1139/e04-066 ◽

2004 ◽

Vol 41 (11) ◽

pp. 1273-1283 ◽

Cited By ~ 13

Author(s):

Christian B Skovsted ◽

John S Peel ◽

Christian J Atkins

Keyword(s):

New Species ◽

Functional Morphology ◽

Lower Cambrian ◽

Early Cambrian ◽

Taxonomic Affinity ◽

East Greenland ◽

North East ◽

Close Proximity ◽

Two New Species

The cap-shaped Early Cambrian fossil Triplicatella, previously known only from Australia, is reported from the upper Lower Cambrian of North and North-East Greenland, western Newfoundland, and Siberia. The occurrence of Triplicatella in Laurentia strengthens faunal ties between Laurentia and the Australian margin of Gondwana in late Early Cambrian times and supports hypotheses advocating the close proximity for the two palaeocontinents. Two new species, Triplicatella sinuosa n. sp., and T. peltata n. sp. are described, morphological details of which help elucidate the functional morphology and taxonomic affinity of the group. Three opercular types attributable to Triplicatella are left in open taxonomy. The postulated affinity of Triplicatella to hyoliths is confirmed, although the genus can not be placed within either of the two orders of hyoliths currently recognized.

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Lower Cambrian trace fossils from northern Greenland

Rapport Grønlands Geologiske Undersøgelse ◽

10.34194/rapggu.v137.8013 ◽

1988 ◽

Vol 137 ◽

pp. 43-53

Author(s):

J Bergström ◽

J.S Peel

Keyword(s):

Lower Cambrian ◽

Trace Fossils ◽

Trace Fossil ◽

East Greenland ◽

North West ◽

North Greenland

Rusophyciform and cruzianaeform trace fossils are described from Lower Cambrian siliciciastic shelf deposits in North-West and North Greenland. Cruziana cf. C. dispar Linnarsson, 1869 is reported from the Dallas Bugt Formation of Inglefield Land while a new ichnospecies, Rusophycus marginatus, occurs in the Buen Formation of Peary Land and in the equivalent Humboldt Formation of Daugaard-Jensen Land. These species show no similarity to the Cruziana sp. previously described from East Greenland. The occurrence of C. cf. C. dispar could indicate some similarity in Cambrian trace fossil 'ichnofaunas' between Greenland and Europe but available material is insufficient to ciarify this relationship.

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Forest Fires, Climate, and Sea-Level Changes in a Coastal Plain-Shallow Marine Succession (Early-Middle Oxfordian Jakobsstigen Formation, North-East Greenland)

Journal of Sedimentary Research ◽

10.1306/d4268c11-2b26-11d7-8648000102c1865d ◽

2000 ◽

Vol Vol. 70 (2000), ◽

Author(s):

Henrik Vosgerau (1) (*), Jorgen A.

Keyword(s):

Sea Level ◽

Coastal Plain ◽

Forest Fires ◽

Sea Level Changes ◽

Shallow Marine ◽

East Greenland ◽

North East ◽

And Sea Level

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Jurassic syn-rift sedimentation on a seawards-tilted fault block, Traill Ø, North-East Greenland

Geological Survey of Denmark and Greenland Bulletin ◽

10.34194/geusb.v5.4800 ◽

2004 ◽

Vol 5 ◽

pp. 9-18 ◽

Cited By ~ 2

Author(s):

Henrik Vosgerau ◽

Peter Alsen ◽

Ian D. Carr ◽

Jens Therkelsen ◽

Lars Stemmerik ◽

...

Keyword(s):

General Pattern ◽

The West ◽

Shallow Marine ◽

East Greenland ◽

Accommodation Space ◽

North East ◽

Fault Block ◽

Marine Sand ◽

Direct Indication ◽

Tectonic Development

Middle–Late Jurassic rifting in East Greenland was marked by westwards tilting of wide fault blocks bounded by major N–S-trending east-dipping synthetic faults. The syn-rift successions thicken westwards towards the faults and shallow marine sandstones show mainly southwards axial transport directions. An exception to this general pattern is found in south-east Traill Ø, which constitutes the E-tilted Bjørnedal Block, which is bounded to the west by the westwardsdipping antithetic Vælddal Fault. The stratigraphic development of the Jurassic succession on this block shows important differences to the adjacent areas reflecting a different tectonic development. Shallow marine sand seems initially to have filled accommodation space of the immediately adjacent block to the west. This block subsequently acted as a bypass area and much of the sediment was spilled eastwards onto the hangingwall of the east-dipping Bjørnedal Block. The succession on the Bjørnedal Block shows an eastwards proximal–distal decrease in sandstone– mudstone ratio, reflecting increasing water depth and progressive under-filling of the subbasin towards the east in agreement with the dip direction of the fault block. The transverse, mainly south-eastwards palaeocurrents, the eastwards increase in water depths and decrease in sandstone–mudstone ratio on the Bjørnedal Block are at variance with the standard picture of westtilted blocks with southwards-directed palaeocurrents and decrease in grain size. Earlier palaeogeographic reconstructions have to be modified to account for the east-dipping hangingwall and different stratigraphic development of the area. The sea was thus open towards the east and there is no direct indication of a barrier or shoal east of Traill Ø.

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Lower Cambrian trace fossils from the Buen Formation of central North Greenland: preliminary observations

Rapport Grønlands Geologiske Undersøgelse ◽

10.34194/rapggu.v147.8106 ◽

1990 ◽

Vol 147 ◽

pp. 44-62

Author(s):

I.D Bryant ◽

R.K Pickerill

Keyword(s):

Lower Cambrian ◽

Trace Fossils ◽

Shallow Marine ◽

Basal Portion ◽

North Greenland

The trace fossils Cruziana cf. C. stromnessi (Trewin, 1976), Curvolithus Fritsch, 1908, Hormosiroidea Schaffer, 1928, Monomorphichnus cf. M. bilinearis Crimes, 1970, Monomorphichnus lineatus Crimes et al., 1977, cf. Palaeobullia Gotzinger & Becker, 1932, Palaeophycus tubularis Hall, 1847, Phycodes pedum Seilacher, 1955, Psammichnites Torell, 1870, Rusophycus Hall, 1852, Skolithos Haldeman, 1840 and cf. Zoophycos Massalongo, 1855 are recorded and briefly described from the Lower Cambrian Buen Formation, central North Greenland. Interbedded sandstones, siltstones and shales of the Buen Formation were deposited in a tide and storm-dominated shallow marine shelf environment. Ichnofaunal diversity is low in monolithologic cross-bedded sandstones, which characterise the basal portion of the sequence, and considerably higher in heterolithologic sandstones, siltstones and shales, which occur higher in the sequence.

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