Zobrazeno 1 - 10
of 57
pro vyhledávání: '"J. C. Briden"'
Autor:
Valerian Bachtadse, J. C. Briden
Publikováno v:
Geophysical Journal International. 104:635-646
SUMMARY The approach of Gondwana, and/or microplates derived from its northern margins, towards Laurentia and the closure of the intervening Palaeo-Tethys is a controlling factor in the geodynamic evolution of the Atlantic bordering continents during
Publikováno v:
Geophysical Journal of the Royal Astronomical Society. 23:101-117
Summary A least-squares fit of the 500-fathom or 1000-metre contour of the principal continental masses has been constructed which may approximate to the arrangement of the continents in Permo-Triassic time. Reliable PermoTriassic palaeomagnetic data
Autor:
J. C. Briden, B. A. Daniels
Publikováno v:
Journal of the Geological Society. 156:317-326
Three Normal and three Reversed palaeomagnetic polarity zones were identified in the exposed 67 m section of Mercia Mudstone at St Audrie’s Bay, Somerset, which has been regarded as being of Norian age on limited biostratigraphic evidence. The pola
Publikováno v:
Geophysical Journal International. 136:705-713
SUMMARY About six separately orientated cores were collected at each of 14 sites distributed throughout the arcuate, west-dipping, 6 km thick, Freetown layered igneous complex. Alternating field and thermal demagnetization both isolate a stable compo
Autor:
E. McClelland, J. C. Briden
Publikováno v:
Journal of Geophysical Research: Solid Earth. 101:21995-22013
We propose a new methodology for Thellier-type paleointensity experiments. In standard paleointensity experiments the blocking temperatures of most stable remanences are often not reached before thermal alteration of magnetic mineralogy begins, and s
Autor:
Martyn S. Stoker, W. D. Scott, David J.A. Evans, Ian P. Wilkinson, Rex Harland, D. A. Ardus, J. C. Briden, N. M. Hine, Alick Leslie
Publikováno v:
Journal of the Geological Society. 151:235-249
A punctuated 103.3 m thick succession of upper Palaeogene to Quaternary sediments has been recovered in a borehole from the upper Hebrides Slope, west of Britain. The borehole proved 11.2m of upper Oligocene, carbonate-rich muds at the base, unconfor
Publikováno v:
Episodes. 16:456-460
Publikováno v:
Journal of Geophysical Research: Solid Earth. 98:1743-1749
Geological application of paleomagnetic data generally relies on equating radiometric or biostratigraphic age with that of the characteristic remanence. Yet the standard of proof of paleomagnetic age is often unsatisfactory and is extremely difficult
Autor:
J. C. Briden, Valerian Bachtadse
Publikováno v:
Geological Society, London, Memoirs. 12:43-48
The currently available palaeomagnetic data base for Gondwana is reviewed and using revised rotation parameters for the fit of the southern continents an attempt has been made to construct an apparent polar wander path for Gondwana during Ordovician
Publikováno v:
Geochemistry, Geophysics, Geosystems. 2
[1] Analysis of the Batoka Basalts exposed in the Zambezi Gorge some 40 km east of Victoria Falls characterizes them as high Fe, moderately high Ti, and low K, P, and Zr tholeiites. The 40Ar-39Ar age determinations are tightly clustered at 180–179