Showing papers by "Memorial University of Newfoundland published in 1968"

Fossils found in the Pre-Cambrian Conception Group of South-eastern Newfoundland

Abstract: THE Biscay Bay–Cape Race area of the southern end of the Avalon Peninsula, south-eastern Newfoundland (Figs. 1 and 2), was mapped by one of us (S. B. M.) during the summer of 1967; it was found to be underlain by rocks belonging to the Conception Group and the overlying St John's Formation of the Cabot Group, largely hidden beneath a cover of glacial drift except along the coast where the strata are well exposed in cliff sections. It has been found possible on a lithological basis to subdivide locally that part of the Conception Group which is present in this area into lower, middle and upper divisions. The lower division is chiefly cherts, the middle dominantly siliceous mudstones occasionally interbedded with sandstones, and the upper of green and red shaly mudstones, more massive siliceous mudstones and graded sandstones (turbidites). These strata have a combined thickness of some 5,000 feet which is less than Rose's1 estimate of 7,000 feet for the thickness of the Group as a whole (a figure which Brueckner, personal communication, regards as probably an underestimate). The beds of the Conception Group and of the conformable St John's Formation are thrown into folds which trend north-east. Although the basal part of the Conception Group is apparently absent from the sequence in this area, the local upper division, which is the one that particularly concerns us here, undoubtedly lies within the actual upper part of the Conception Group as a whole, for the transition from Conception to Cabot Group takes place, only a little higher stratigraphically in the sequence, between Mistaken Point and Cape Race.

Perturbations in the Earth's Rotation and Geomagnetic Core-Mantle Coupling

Abstract: The effect of electromagnetic core-mantle coupling on small changes in the length of day and the geographical location of the pole is treated by a simplified model which neglects the time required for magnetic diffusion through the lower mantle, and approximates the poloidal field by the centred dipole. The resulting formulae for the time constants of the coupling are more meaningful physically than, and give nearly the same numerical values as, those derived previously by more rigorous methods. It is shown that, despite the complexity of the electromagnetic interactions at the coremantle boundary, the two kinds of perturbation in the Earth's rotation can be treated independently. Simple expressions are given for the electromagnetic restoring torque on the accelerating mantle. The effect of the geomagnetic coupling on the diurnal wobble is discussed, and concluded to be negligible.

A Theory of the Jazz Community

Abstract: (1968). A Theory of the Jazz Community. The Sociological Quarterly: Vol. 9, No. 3, pp. 318-331.

The distribution of giant squids (Cephalopoda, Archxteuthidae) in the North Atlantic and particularly about the shores of Newfoundland

Abstract: Reference to the records of giant squid of the family Architeuthidae indicate that they are in the coastal waters of insular Newfoundland every third decade, beginning in the 1870's. Concentrated effort has been made to secure any available specimens during the decade of the 1960's. Since 1961 there have been nine strandings and seven of the animals have been secured by the author for study. These represent the first North American specimens to be studied since 1935. Apparently there is one species, Architeuthis dux STEENSTRUP. There is little evidence of a biological basis explaining the cyclic nature of the incidence of A. dux in Newfoundland waters. The majority of strandings occur on the exposed northeast coast suggesting hydrographic conditions being causal.

Photodecomposition of Trimethylsilyl Azide in Solid Argon

Abstract: WHEN some group IV azide derivatives have been subjected to photodecomposition in argon matrices at cryogenic temperatures, isocyanides have been produced. In the case of methyl azide H3CNNN, hydrogen isocyanide HN≡C was proved to result from a secondary photolysis of methylenimine H2C = NH (ref. 1). From silyl azide, H3SiNNN, iminosilicon HNSi has been detected2, but the mechanism of formation was uncertain; the vibrational absorptions of other products were not then assigned. From germyl azide H3GeNNN, HNGe has been tentatively identified (unpublished work with S. Cradock). The force constants of the heavy-atom valence-stretching vibrations of HNSi and HNGe are probably appropriate to what might effectively constitute “double bonds” rather than to a “triple bond” as in the case of HNC. Because π-type bonds of atoms beyond the first row are decreasingly stable because of the reduced overlap of the p-orbitals of the larger atoms, it is interesting to know the results of a situation in which there might be unsaturation either in a chemical bond between only first row atoms or alternatively, in a bond involving a second row atom. Such a case has been discovered following the photolysis of trimethylsilyl azide isolated in solid argon at 17° K.

The "Eternity" of the Platonic Forms

Abstract: A re the Platonic Forms eternal in the sense that they endure everlastingly, or is their eternity such that it transcends duration? The latter alternative is defended by H. Cherniss' and is in fact the traditional interpretation of Plato's doctrine, whereas the former view was held by F. M. Cornford2. My present purpose is to show that the traditional interpretation rests upon an insecure basis. In fact, Professor Cherniss' case, and with it the traditional viewpoint, depends on an interpretation of the word 'eL as used by Plato with regard to the being of the Forms. Cherniss3 supposes that i , f N I/ % Iro 0 oE Ln OOi XpOVOU UV?X-TLVO?LCVOV XOCL 7trLpOV, .0 pLv ?V -rcp V5V, 0'r Or VV LocXa-TCUCL, Tq gTz(,)q &Xmx?OxtouCxl) Tuyyxvoui-a xOL ae yLyVO?V-jq. (In Tim. 73C-D (I. 239. 2-6 Diehl).)

Helminths Recovered from Wilson's Snipe, Capella gallinago delicata

Abstract: Many papers have been written about Wilson's snipe (Erickson, 1950), but few of them deal with the parasites of the bird. Schmidt (1962, 1963a, 1963b, 1964) working in Northern Colorado described new species of Hymenohpis, Tetrameres and Arythmorhynchus and listed the other parasites he found in a sample of 29 snipe. In the present work birds from Newfoundland, Ontario and Louisiana were examined for helminth parasites, to determine the species composition of any burden that they might be carrying and to note any differences in the species composition of the burden in birds from different geographical areas. It was also hoped to show if there was any difference in the burden carried by male and female birds.