Geological Results of Four Expeditions to Ubekendt Ejland, West Greenland

ARCTIC ◽  
1958 ◽  
Vol 11 (4) ◽  
pp. 198 ◽  
Author(s):  
Harald I. Drever

Outlines petrological discoveries made in 1938, 1939, 1950 and 1957 by British expeditions to this island in the Umanak Fjord region: an abundance of magnesia-and lime-rich intrusions and lavas; a central intrusive complex in the south where acid and basic magmas co-exist; and a suite of dykes, lavas, and pyroclastic rocks on the west coast. Status of research on problems raised by these findings is reported. Discussion is included of author's investigations in 1957 of the olivine-rich rocks in the lower group of lavas and the minor intrusions cutting them. Detailed information on variations in the intrusions and on their relationship with the lavas is presented.

1948 ◽  
Vol 1 ◽  
pp. 1-32
Author(s):  
H Ramberg

During the journey along the west coast of Greenland where some of the members of the G. G. U.s expeditions of 1946 had to undertake geologic investigations in the Holsteinsborg district, a scattered and casual geologic reconnaissance was made at several places along the coast. After the return to Copenhagen some rock samples from the vicinity of Sukkertoppen appeared to contain the comparatively rare mineral of sapphirine, and a brief examination of these rock specimens was made in spite of the incomplete field work.


1975 ◽  
Vol 75 ◽  
pp. 51-53
Author(s):  
F Ulff-Møller

The main purpose of the summer field work was to carry out a detailed investigation of the high temperature niekeliferous pyrrhotite and tellurie iron mineralisation whieh oeeurs in the subvolcanie intrusions of the Hammers Dal Complex (Pedersen, this report, and in press), and to seareh for other occurrenees with an econornic evaluation in view. The dyke-like intrusions are mainly found in gorges in the south facing slope of the E-W trending Hammers Dal, about 10 km from the west coast of Disko. They are exposed only in the upper 400 m of the Rinks Dal Member. The depth of the intrusions was thus 400-500 m below the palaeosurfaee, marked by the weakly eontaminated basalts and more strongly eontaminated 'andesites' of the Niaqussat Member which are considered to be the extrusive equivalents of the intrusions. The magma seems to have intruded along a joint zone dipping about 70° WSW forming pipes or dyke-like bodies plunging gently NNW.


1870 ◽  
Vol 160 ◽  
pp. 309-316

The difficulty of securing in England a sufficient number of consecutive cloudless days to render it possible to determine with any degree of accuracy the relation existing between the sun’s altitude and the chemical intensity of total daylight, induced us to undertake a series of measurements on the west coast of Portugal, where during the months of July and August the sky is generally cloudless. The method of measurement employed was that described by one of us in previous communications to the Royal Society, founded upon an exact estimation of the tint which standard sensitive paper assumes when exposed for a given time to the action of daylight. The observations, the results of which are given in the following communication, were made in the autumn of 1867, through the kindness of Thomas Creswell, Esq., at the Quinta do Estero Furado, situated on the flat table-land on the southern side of the Tagus, about 8½ miles to the south-east of Lisbon, lat. 38° 40' N. and long. 9° W. The sensitive paper was exposed in the plane of the horizon, the instrument being placed upon a carefully levelled stand at the height of 4 feet 5 inches above the level of the ground in a sandy field having a clear horizon, the most considerable object in the neighbourhood being a house distant 130 paces to the west, the roof of which subtended an angle of 7° with the plane of the paper.


Author(s):  
Feiko Kalsbeek ◽  
Lilian Skjernaa

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Kalsbeek, F., & Skjernaa, L. (1999). The Archaean Atâ intrusive complex (Atâ tonalite), north-east Disko Bugt, West Greenland. Geology of Greenland Survey Bulletin, 181, 103-112. https://doi.org/10.34194/ggub.v181.5118 _______________ The 2800 Ma Atâ intrusive complex (elsewhere referred to as ‘Atâ granite’ or ‘Atâ tonalite’), which occupies an area of c. 400 km2 in the area north-east of Disko Bugt, was emplaced into grey migmatitic gneisses and supracrustal rocks. At its southern border the Atâ complex is cut by younger granites. The complex is divided by a belt of supracrustal rocks into a western, mainly tonalitic part, and an eastern part consisting mainly of granodiorite and trondhjemite. The ‘eastern complex’ is a classical pluton. It is little deformed in its central part, displaying well-preserved igneous layering and local orbicular textures. Near its intrusive contact with the overlying supracrustal rocks the rocks become foliated, with foliation parallel to the contact. The Atâ intrusive complex has escaped much of the later Archaean and early Proterozoic deformation and metamorphism that characterises the gneisses to the north and to the south; it belongs to the best-preserved Archaean tonalite-trondhjemite-granodiorite intrusions in Greenland.


Author(s):  
A. Stuart

In dealing with this subject it is essential to define the high rainfall districts, and on, perusing a rainfall map it was found, contrary to expectations, that the greater part of the North Island, as represented by the Auckland Province and Taranaki, has a rainfall of over 50 inches per annum. In the same category falls the West Coast of the South Island and all of Stewart Island.


Author(s):  
Donovan Kelley

INTRODUCTIONPresence of O-group bass, Dicentrarchus labrax (L.), has been recorded for a number of estuaries and tidal backwaters in the south of the United Kingdom, including the tidal Thames (Wheeler, 1979), the outer Thames at Southend (Murie, 1903), the Medway (Van den Broek, 1979), Langstone Harbour (Reay, 1973), the Dart (Dando & Demir, 1985), and the Tamar (Hartley, 1940). The author has found them, additionally, in Chichester Harbour and in the Cuckmere (Sussex), Teign and Tavy estuaries. Correspondents have reported them from the estuaries of the Blackwater (Cox), Crouch (Wiggins), Lynher (Gee) and Fal (Melhuish); also from the Fleet backwater in Dorset (Fear). It may be inferred that all estuaries and tidal backwaters on the south and south-east coasts of the U.K. constitute bass nurseries, in some degree.*


1876 ◽  
Vol 3 (1) ◽  
pp. 16-23 ◽  
Author(s):  
A. E. Nordenskiöld

Ice and Bell Sounds are two large fiords opening out on the west coast of Spitzbergen, which cut deep into the country, both in an easterly direction towards Stor Fiord, and in a northerly direction towards the south part of Wijde Bay. The shores of the Sounds are for the most part occupied by high mountains, precipitous towards the sea, nearly free from snow during the summer, whose sides, being bare of vegetation, offer the observer an uncommonly favourable opportunity for studying the geological structure of the rocks. Within an excecdingly limited space one meets here with a succession of strata belonging to a great many different geological periods, and rich in fossils, both of the vegetable and animal kingdom.


1974 ◽  
Vol 69 ◽  
pp. 295-298
Author(s):  
Michael B. Walbank

This document is one of a number of Attic proxeny-decrees that A. G. Woodhead considered to be evidence for Athenian concern with the south-west Aegean towards the end of the fifth century B.C. He identified the honorand Proxenos as a native of Chalke, a small island off the west coast of Rhodes. I share the view of J. and L. Robert that Woodhead has not proved his case either for the date or for the ethnic.The inscription is non-stoichedon, its engraving inexpert and careless, with several mistakes untidily erased and corrected. There is a mixture of Attic and Ionic letter-forms in the first three lines (gamma, eta, and lambda are Ionic, while xi is written chi sigma); otherwise the lettering is Attic, indicating a date before 403 B.C.


2004 ◽  
Vol 55 (7) ◽  
pp. 653 ◽  
Author(s):  
Kim D. Smith ◽  
Norman G. Hall ◽  
Ian C. Potter

Hypothalassia acerba was sampled seasonally using traps at depths of 35, 90, 145, 200, 255, 310 and 365 m on the west and south coasts of Western Australia. Catch rates peaked at depths of 200 m on the west coast and 145 m on the south coast but at similar temperatures of 16.1–17.1°C. The west and south coast catches contained 69% and 84% males respectively. The carapace length of H. acerba declined significantly by 4 mm for each 100 m increase in depth. The maximum carapace length of males was greater than females on the west coast (135 v. 113 mm) and south coast (138 v. 120 mm). Furthermore, after adjustment to a depth of 200 m, the mean carapace lengths of males were greater than females on both the west coast (96.6 v. 94.6 mm) and south coast (101.5 v. 91.4 mm), with the difference on the south coast being significant (P < 0.001). Thus, in summary, (1) distribution was related to depth and temperature; (2) body size was inversely related to water depth; and (3) males grew larger and were caught in greater numbers than females. There was also evidence that the distribution changed slightly with season and of spatial partitioning by H. acerba and other large deep-water invertebrate predators.


Author(s):  
Donovan Kelley

A bass tagging project on the south coast of Anglesey, 1971–5, yielded 86 recoveries from 912 taggings. In addition to expected local movements a systematic pattern of seasonal migration was identified for adults. Fish present in summer moved to south Cornwall for the winter, returning in succeeding summers for spawning. Departure was normally before mid-October. Fish present after that had summered further north (reaching Furness in warm summers). These too moved south as winter advanced, though possibly not reaching Cornwall. A few solitary fish – unfit specimens or members of weak year-classes – appeared to remain through the winter. No evidence was found of movement to, or intermingling with stocks of, the Irish coast; nor, with one exception, the mainland coast of Europe. There was also no indication of movement eastward along the south coast: suggesting discrete populations there from those on the west coast.


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