The growth vector in trace fossils: Examples from the Lower Cambrian of Norway

Ichnos ◽  
1991 ◽  
Vol 1 (4) ◽  
pp. 261-276 ◽  
Author(s):  
Richard G. Bromley ◽  
Nils‐Martin Hanken
Keyword(s):  
Lower Cambrian ◽  
Trace Fossils ◽  
Growth Vector

scholarly journals Lower Cambrian trace fossils from northern Greenland

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.

Ediacaran fossils from the southwestern Great Basin, United States

2000 ◽  
Vol 74 (2) ◽  
pp. 349-359 ◽  
Author(s):  
James W. Hagadorn ◽  
Ben Waggoner
Keyword(s):  
United States ◽  
Great Basin ◽  
Southern Africa ◽  
Lower Cambrian ◽  
Trace Fossils ◽  
Death Valley ◽  
Lower Member ◽  
Upper Third

Ediacaran fossils from the southwestern Great Basin may help constrain regional Vendian-Cambrian biostratigraphy and provide biogeographic links between facies in this region and elsewhere. Locally, trace fossils suggest the Vendian-Cambrian boundary occurs within or below the upper third of the lower member of the Wood Canyon Formation. Ediacaran soft-bodied and tubular fossils, including the frondlike fossil Swartpuntia and tubular, mineralized or agglutinated fossils similar to Archaeichnium Cloudina Corumbella, and Onuphionella occur in the lowermost Wood Canyon Formation. Discoidal forms referred to Nimbia occur in both the lowermost Wood Canyon Formation and the underlying strata of the Stirling Quartzite. These fossils occur directly below Lower Cambrian trace fossils, including Treptichnus pedum, and confirm the persistence of the Ediacaran biota to near the base of the Cambrian. These faunas may also help strengthen previously proposed correlation schemes between the two main facies belts of the southwestern Great Basin (the Death Valley and White-Inyo facies), because a nearly identical Vendian-lowest Cambrian succession of faunas occurs in both regions. Lastly, lack of cosmopolitan Ediacaran faunas in these strata suggests a paleobiogeographic link between the southwestern U.S. and southern Africa in Vendian time.

The Precambrian–Cambrian boundary problem and its prospects, Northwest Himalaya, India

1984 ◽  
Vol 121 (3) ◽  
pp. 211-219 ◽  
Author(s):  
G. Kumar ◽  
B. K. Raina ◽  
O. N. Bhargava ◽  
P. K. Maithy ◽  
R. Babu
Keyword(s):  
Boundary Problem ◽  
Lower Cambrian ◽  
Trace Fossils ◽  
Northwest Himalaya ◽  
Late Precambrian

AbstractThe Precambrian–Cambrian boundary problem is being studied in an areno-argillaceous sequence in the Kashmir and Spiti Valley, Northwest Himalaya, India. In Kashmir, a rich and diversified microbiota – cryptarchs and algae of the Late Precambrian, and low Lower Cambrian trace fossils are recorded. In the Spiti Valley, the yield of microbiota is poor and the trace fossils are late Lower Cambrian.

Upper Precambrian–Lower Cambrian biota from the northwest of Argentina

1986 ◽  
Vol 123 (4) ◽  
pp. 367-375 ◽  
Author(s):  
Florencio Gilberto Aceñolaza ◽  
Felipe Ramón Durand
Keyword(s):  
North America ◽  
Lower Cambrian ◽  
Trace Fossils

AbstractThe principal characters of the biota from Upper Precambrian–Lower Cambrian rocks in the northwest of Argentina are described. It is possible to observe two groups: the trace fossils and the medusoid impressions. At the same time, a regional palaeogeographical analysis is attempted as well as a comparison with outcrops of similar age from the Gondwanaland area and from North America.

scholarly journals Glacial erratic boulders from Jutland, Denmark, feature an uppermost lower Cambrian fauna of the Lingulid Sandstone Member of Västergötland, Sweden.

2015 ◽  
Vol 63 ◽  
pp. 59-86
Author(s):  
Thomas Weidner ◽  
Gerd Geyer ◽  
Jan Ove R. Ebbestad ◽  
Volker von Seckendorff
Keyword(s):  
Lower Cambrian ◽  
Source Area ◽  
Trace Fossils ◽  
Middle Part ◽  
Northern Germany

Reinvestigation of glacial erratic boulders from Jutland, Denmark, and from northern Germany, has revealed a moderately diverse fauna with the trilobites Holmiella? sp., Epichalnipsus anartanus, Epichalnipsus sp. A, Epichalnipsus sp. B, and Berabichia erratica, three species of lingulid brachiopods, one hyolith species, and trace fossils comparable to Halopoa imbricata. Comparison with faunas from the Cambrian of Scandinavia strongly suggested a biostratigraphic position equivalent to the uppermost part of the (revised) Holmia kjerulfi–‘Ornamentaspis’ linnarssoni to lowermost Comluella?–Ellipsocephalus lunatus zones sensu Nielsen & Schovsbo (2011), or the lower to middle part of the traditional ‘Ornamentaspis’ linnarssoni Zone, but probably a particular horizon and biofacies not yet discovered in Scandinavia. Considerations of glacial transport regimes and the distribution of comparable rock units, as well as a petrographical analysis of the material from the studied erratic boulders and rocks from outcrops in Sweden, indicate that the boulders were derived from the Lingulid Sandstone Member of the File Haidar Formation and the source area is situated in the vicinity of the present-day outcrops in the Halleberg–Hunneberg area, Västergötland, Sweden.

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

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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