A late Middle Cambrian fauna from Nyeboe Land, North Greenland, is described. It is demonstrated that the fauna, dominated by agnostid trilobites, belongs to the Atlantic province. The samples indicate the presence of the zones of Ptychagnostus punctuosus and Jincella brachymetopa. The distribution of the Middle Cambrian faunas is briefly discussed.
The Middle-Upper Cambrian transition in southeastern Newfoundland is shown to be very similar to the transition in Scandinavia and in the English Midlands. The late Middle Cambrian Lejopyge laevigata Zone, which is recorded for the first time from eastern Canada, is contained in the basal part of the Elliott Cove Formation and is conformably overlain by the Upper Cambrian Agnostus pisiformis Zone. The following trilobite species from the Lejopyge laevigata Zone at Manuels River and on Random Island are described: Andrarina costata (Angelin), Paradoxides sp., Lejopyge laevigata (Dalman), and Peronopsis insignis (Wallerius).
Summary The discovery of Ediacara type faunas and later the Tommotian fauna at levels below the supposed first appearance of trilobites has brought new life to the discussion of the formal position of the Precambrian–Cambrian boundary. The oldest shelly faunas are apparently restricted to a few favoured areas, whereas transition beds developed as quartz sandstones, mostly unfossiliferous apart from trace fossils, seem to have a much larger regional distribution. The sequences of quartz sandstones overlie a Precambrian crystalline basement of a much greater age or clastic sediments, in part tillites, and are in turn overlain by a variety of rocks containing olenellacean trilobites. The lowering to the Cambrian boundary makes the correlation of the widespread marine sandstones below levesl with trilobites highly pertinent. The correlation of some such sandstones in Greenland and Scandinivia is discussed below. In this account the Tommotial Stage is regarded as the basal Cambrian stage.
During the last decade a number of geological journals with international circulation have undergone considerable changes in style to comply with modern demands and reproduction techniques. The Scandinavian journals Lithos and Lethaia, launched in 1968, have set an exemplary standard which is the result of Dr Anders Martinsson's admirable efforts. For the purpose of standardisati on of the Danish journals it seems only natural to incorporate many of the ideas introduced by Martinsson. Papers based on any kind of geological material or data from Green land may be submitted for publication in Meddelelser om Gronland or Bulletin of the Geological Society of Denmark, whereas papers with an emphasis on Danish topics can be submitted to the Bulletin. Papers based on foreign material may also be submitted to the Bulletin in cases where the author is a member of the Society or has been associated with a Danish institute while working on the material. The final decision on whether or not a manuscript will be accepted for publication rests with the editors of the respective journals, acting, when necessary, on the advice of appropriate experts. Certain fundamental requirements for the manuscripts are common to both journals; specific requirements are listed under separate headings. It is the responsibility of the author(s) to bring his (their) manuscripts up to standard with regard to typescript, illustrations, and scientific content.
Abstract Angelin's type specimens of the trilobite Raymondaspis (“Holometopus”) limbata considered to be lost have recently been recovered. The material of the species limbata, which is the type species of Raymondaspis, is redescribed and discussed, and an emended diagnosis of the genus Raymondaspis is presented.
An occurrence of Lower Palaeozoic rocks within the Precambrian terrain near Sukkertoppen, West Greenland, was discovered in 1965 by Caj Kortman and Jens Gothenborg working under fil. mag. L. Keto for Kryolitselskabet Øresund AIS, Copenhagen. The material was kindly placed at the disposal of the writer for further study.
Fossiliferous samples were collected from the North Greenland fold belt by P. R. Dawes and N. J. Soper during reconnaissance mapping in 1969. In a preliminary report (Dawes & Soper, 1970) an Ordovician age was suggested for graptolite shales at O. B. Bøggild Fjord and Harebugt, the age being based on faunal content, and the association with intraformational limestone breccias bearing a striking resemblance to the Ordovician succession in the western part of the fold belt in Nyeboe Land. A shelly fauna from Frederick E. Hyde Fjord was referred to the Silurian. The fossiliferous samples were presented to the present authors for further study. This report summarises the fauna from Dawes & Soper's (1970) localities F1 to F5.
The Precambrian continental sandstones in the Julianehåb district, South Greenland, are discussed with regard to distribution, lithology, structures, and origin. The sandstone/volcanics sequence, which was included as part of the Gardar formation by Wegmann (1938), is established as a separate formation - The Eriksfjord Formation. The formation is divided into six members, and a tentative correlation between the now separate sandstone areas is presented.
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