scholarly journals Early Ordovician trilobites and molluscs from the Poulsen Cliff Formation, Washington Land, western North Greenland

1990 ◽  
Vol 38 ◽  
pp. 11-32
Author(s):  
R. A. Fortey ◽  
]. S. Peel

A well-preserved, shallow water bathyurid trilobite fauna of early Ordovician age, and associated gastropods and an undetermined hyolith are described from the Poulsen Cliff Formation of Washington Land, western North Greenland. Two new bathyurid species, Licnocephala sminue and Pe/tabellia elegans, and a new gastropod species, Plethospira(?) floweri, are described. Biolgina Maximova is considered a junior subjective synonym of Peltabellia Whittington. The distribution of the genus is an example of close relationship between shallow water trilobite faunas of Laurentia and the North-east Siberian platform in the early Ordovician.

1989 ◽  
Vol 144 ◽  
pp. 5-15
Author(s):  
R.A Fortey ◽  
J.S Peel

The Christian Elv Formation (Early Ordovician) of Daugaard-Jensen Land, western North Greenland, is formally proposed and recognised from southern Hall Land, in the east, to western Ellesmere Island in the Canadian Arctic Islands, to the west. The formation in its type section includes a shallow water trilobite fauna suggesting a mid-Tremadoc age; conodonts indicate the Rossodus manitouensis Zone af the North American Midcontinent Realm. Two species af hystricurid trilobites are present, of which one, Hystricurus scrofulosus, is dcscribed as a new species. The distribution of Hystricurus followed the early Ordovician palaeo-equator and was not confined by palaeocontinental boundaries. Paraplethopeltis is considered to be a subgcnus af Hystricurus.


Author(s):  
Peter R. Dawes ◽  
Bjørn Thomassen ◽  
T.I. Hauge Andersson

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Dawes, P. R., Thomassen, B., & Andersson, T. H. (2000). A new volcanic province: evidence from glacial erratics in western North Greenland. Geology of Greenland Survey Bulletin, 186, 35-41. https://doi.org/10.34194/ggub.v186.5213 _______________ Mapping and regional geological studies in northern Greenland were carried out during the project Kane Basin 1999 (see Dawes et al. 2000, this volume). During ore geological studies in Washington Land by one of us (B.T.), finds of erratics of banded iron formation (BIF) directed special attention to the till, glaciofluvial and fluvial sediments. This led to the discovery that in certain parts of Daugaard-Jensen Land and Washington Land volcanic rocks form a common component of the surficial deposits, with particularly colourful, red porphyries catching the eye. The presence of BIF is interesting but not altogether unexpected since BIF erratics have been reported from southern Hall Land just to the north-east (Kelly & Bennike 1992) and such rocks crop out in the Precambrian shield of North-West Greenland to the south (Fig. 1; Dawes 1991). On the other hand, the presence of volcanic erratics was unexpected and stimulated the work reported on here.


2000 ◽  
Vol 79 (2-3) ◽  
pp. 335-343 ◽  
Author(s):  
Marit-Solveig Seidenkrantz ◽  
Karen Luise Knudsen ◽  
Peter Kristensen

AbstractThe marine Eemian (marine oxygen-isotope substage 5e: MIS 5e) is represented by shallow-water deposits in southern and western Denmark, while relatively deep-water environments occurred to the north and north-east, where complete interglacial successions seem to be present. We present an overview of the marine Eemian deposits in Denmark, and discuss in more detail indications of climate variability, both for the late Saalian and within the Eemian.


1974 ◽  
Vol 65 ◽  
pp. 18-23
Author(s):  
J.S Peel ◽  
P.R Dawes ◽  
J.C Troelsen

The north-east 'corner' of Greenland is geologically probably the least known region in North Greenland. Various expeditions have visited the coastal parts but geological detail, particularly faunal information, has remained surprisingly scarce. Initial field work by Koch (1923, 1925) and Troelsen (1949a, b, 1950) showed that a Precambrian to Silurian section - unfolded in the south, folded in the north - was unconformably overlain by a Carboniferous to Tertiary section, now referred to as the Wandel Sea basin (Dawes & Soper, 1973).


1986 ◽  
Vol 132 ◽  
pp. 27-37
Author(s):  
J.R Ineson ◽  
J.S Peel ◽  
M.P Smith

The name Sjælland Fjelde Formation is introduced for a varied sequence of shallow-water platform dolomites and dolomitic limestones, about 105 m in thickness, in Kronprins Christian Land, eastern North Greenland. The new formation lies between the previously described Wandel Valley and Børglum River Formations. Conodont faunas indicate that the Sjælland Fjelde Formation is of Middle to earliest Late Whiterockian (early Middle Ordovician) age and that it can be eorrelated with the upper part of the Wandel Valley Formation of Peary Land to the north-west.


1980 ◽  
Vol 7 (1) ◽  
pp. 71 ◽  
Author(s):  
GJ Hocking

Pseudomys nocaehollandiae is recorded for the first time from Tasmania, where it is found to occur in heath and woodland along the north-east coast. The morphological and reproductive status of the specimens collected and their habitat are essentially the same as previously recorded on continental Australia. The close relationship between the distribution of this species and the occurrence of a particular fire regime is stressed.


1985 ◽  
Vol 126 ◽  
pp. 117-128
Author(s):  
F.G Christiansen ◽  
H Nøhr-Hansen ◽  
F Rolle ◽  
P Wrang

During the 1984 field season potential hydrocarbon source rocks were studied in central and western North Greenland. Samples from most lithostratigraphic units were collected from Freuchen Land in the north-east to Washington Land in the south-west. Preliminary results from LECO, Rock-Eval and palynofacies analyses suggest that some intervals in the Cambrian shelf sequence and in the Ordovician and Silurian trough sequence have enough organic matter to qualify as source rocks. Most of the trough sequence is, however, thermally postrnature with respect to oil generation and only the Cambrian Brønlund Fjord Group is expected to have been the source of the oil accumulations in the subsurface.


Author(s):  
Maria Pia Arpioni

Il saggio presenta il lavoro di un giovane fotografo del Nord Est italiano, Giovanni Pasinato (Venezia 1974-), attraverso l’analisi della sua opera e un’intervista all’autore, impegnato in un’attività dalle consistenti valenze cognitive ed etiche, ascrivibile alla Scuola italiana di fotografia del paesaggio (Luigi Ghirri, Guido Guidi, Giovanni Chiaramonte), ma dotata di tratti originali in forte sviluppo. Il contributo intende mostrare come la fotografia di Pasinato—dalle esplorazioni del “terzo paesaggio” lungo strade e autostrade, alla ricerca condotta sulle scene urbane di Treviso e Venezia Mestre, fino alla più recente perlustrazione dell’antico bosco del Montello (sulla cui esistenza minacciata si era levato altissimo anche il canto poetico di Andrea Zanzotto, scomparso nel 2011)—sia tutta incentrata sulla funzione fondamentale dello “sguardo,” grazie alla quale il suo lavoro si caratterizza come indagine e strumento di consapevolezza, in senso lato “politica,” sul rapporto fra l’essere umano e i luoghi. Le immagini di Pasinato, sommesse, limpide e allo stesso tempo avvolte da vaghezza, interrogano l’osservatore, proponendogli un dialogo con gli spazi fotografati ed evidenziando l’inscindibilità stilistica fra forma e contenuto; si distinguono per l’assenza di ogni compiacimento soggettivistico ed estetico, a favore della riscoperta, realizzata per mezzo di una essenziale valorizzazione della “visione,” dello stretto nesso fra cultura e natura, fra l’essere umano e gli altri viventi. Proprio mentre sollecitano il senso della nostra responsabilità collettiva, tralasciando ogni cedimento sentimentalistico e nostalgico, queste fotografie invitano ad avere coscienza e perciò, in ultima analisi, speranza. Pasinato rivendica così alla fotografia un’alta funzione artistica e civile, spesso misconosciuta proprio da quegli enti e istituzioni che dovrebbero avere a cuore il bene comune.   Abstract   The analysis and the interview of the author contained in this essay portray the work of a young Italian photographer, Giovanni Pasinato (Venice 1974-), who lives in the North East of Italy and who devotes himself to an activity encompassing important cognitive and ethical aspects. His work can be included within the Italian School of Landscape Photography (Luigi Ghirri, Guido Guidi, Giovanni Chiaramonte), but has original features in robust development. This essay will show how Pasinato’s photography—from his explorations of the “third landscape” along roads and highways, through his research in the urban scenes of Treviso and Venice Mestre, up to the latest reconnaissance of the Montello’s ancient wood (on whose endangered existence, Andrea Zanzotto, who died in 2011, wrote wonderful poems)—is entirely focused on the fundamental function of the “look,” thanks to which his work characterizes itself as an investigation, an instrument of the awareness, in the broad sense “political,” of the relationship between human being and place. Pasinato’s whispered, limpid yet at the same time ambiguous images, question their beholders, offering them a dialogue with the photographed spaces, underlining the stylistic indivisibility between form and content. In comparison to other landscape photography experiences, Pasinato’s works stand out, thanks to the absence of any subjective and aesthetic self-gratification and by favouring, through an essential enhancement of the “vision,” the revival of the close relationship between culture and nature and between human beings and other living beings. Just as his photographs stress the importance of our collective responsibility, ignoring any sentimental or nostalgic concession, they are an exhortation to raise awareness and, ultimately, hope. Thus, Pasinato ascribes to photography a highly artistic and civil function, which is often disregarded by those organizations and those authorities that should really care for the common good.   Resumen El análisis y la entrevista del autor en que se centra este ensayo presentan la obra de un joven fotógrafo del noreste de Italia, Giovanni Pasinato (Venecia, 1974-), que se dedica a un actividad que abarca importantes aspectos  cognitivos y éticos. Su trabajo puede incluirse en  la Escuela Italiana de Fotografía del paisaje (Luigi Ghirri, Guido Guidi, Giovanni Chiaramonte), pero tiene rasgos originales en fuerte desarrollo. Este ensayo mostrará como la fotografía de Pasinato—desde sus exploraciones del "tercer paisaje" en el camino de carreteras y autopistas, la investigación en las escenas urbanas de las ciudades de Treviso y Venecia Mestre, hasta la más reciente exploración del antiguo bosque de la colina llamada Montello (sobre el riesgo de su desaparición, también el poeta Andrea Zanzotto, fallecido en 2011, escribió algunas de sus mejores obras)—está completamente enfocada en la función fundamental de la observación, gracias al que su trabajo se caracteriza como una investigación, un instrumento de la concienciación, en el amplio sentido “político”, de la relación entre ser humano y lugar. Las imágenes de Pasinato, suaves, claras y al mismo tiempo envueltas en vaguedad, questionan a quien observa, le proponen un dialogo con los espacios fotografiados y subrayan la inseparabilidad estilística entre forma y contenido. En comparación con otras experiencias de fotografía del paisaje, las representaciones de Pasinato destacan gracias a la ausencia de autocomplacencia subjetivista y estética, tratando de descubrir nuevamente la estrecha interrelación entre naturaleza y cultura, entre los seres humanos y otros seres vivientes. En cuanto instan nuestro sentido de la responsabilidad colectiva, dejando de poner la atención en sentimentalismos y nostalgias, estas fotografías invitan a adquirir conciencia y, además, esperanza. Pasinato reclama para la fotografía una importante función artística y civil, muchas veces ignorada por las instituciones que deberían preocuparse por el bien común.


1979 ◽  
Vol 91 ◽  
pp. 57-60
Author(s):  
A.J Boucot ◽  
J.M Hurst

Llandovery faunas have been considered more cosmopolitan than any others during the Lower Ordovician - Middle Devonian with only two undivided biogeographic Realms, the North Atlantic and Malvinokaffric, being recognised. Endemie pentameroids known from the Ashgill - Middle Llandovery of the Uralian region, Siberian Platform and adjacent Sette Daban occur commonly in North Greenland. Thus, during this time and in biofacies rich in pentameroids, the North Atlantic Realm appears divisible into a North Atlantic Region and a Uralian-Cordilleran Region, as in the Upper Silurian.


Author(s):  
N. N. ZINCHUK

Basing on generalization of large actual material on complex investigation of diamond, its characteristic in Upper Paleozoic and  Mesozoic sedimentary thick layers of the Siberian platform has been  provided. It has allowed receiving new data on composition features  and distribution of diamond in recent sediments of main  diamondiferous regions of Lena-Anabar, Central-Siberian and  Tungusskaya sub-provinces. On the north-east of Siberian platform,  the region of Kyutyungdinsky graben and nearby territories,  perspective for the discovery of rich kimberlite bodies with specific  dia- monds, are of the most interest. Special attention has been paid to the Central-Siberian sub-province, where it has been convincingly  shown that the area of development of individual diamond macro- associations is limited by a specific diamondiferous region, within  which complexes of different in age terrigenous and coastal Upper  Paleozoic and Mesozoic sediments are developed. The complex of  features of diamonds from placers of the described platform testifies  by morphology, coloration, hard inclusions, internal structure,  photoluminescence and admixture composition about plurality of  primary sources and availability of still undiscovered kimberlite  bodies within many diamondiferous regions. Application of  typomorphic features of crystals for restoration of exogenous history of diamonds on the path from primary sources to the sites of modern allocation in placers, as well as for paleogeographical reconstructions of distribution of ancient productive thick layers and clarification of  diamondiferous material drift direction, has a significant importance.  Proximity of typomorphic features of diamonds in sedimentary thick  layers of these ages, identified in some diamondiferous regions,  testifies about formation of these collectors due to washout of more  ancient productive layers or Middle Paleozoic primary sources.  Polygeny of mineralogical associations of diamonds from different in age placers within some diamondiferous regions has been noted,  which may be successfully used when forecasting and prospecting primary sources of the mineral.


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