Mesozoic sequence of Fuerteventura (Canary Islands): Witness of Early Jurassic sea-floor spreading in the central Atlantic

1998 ◽  
Vol 110 (10) ◽  
pp. 1304-1317 ◽  
Author(s):  
Christian Steiner ◽  
Alice Hobson ◽  
Philippe Favre ◽  
Gérard M. Stampfli ◽  
Jean Hernandez
Keyword(s):  
Canary Islands ◽  
Early Jurassic ◽  
Sea Floor ◽  
Sea Floor Spreading ◽  
Central Atlantic

A revised magnetic polarity timescale for the Cretaceous and Cainozoic

1982 ◽  
Vol 306 (1492) ◽  
pp. 129-136 ◽  
Keyword(s):  
Magnetic Polarity ◽  
Geomagnetic Reversal ◽  
Sea Floor ◽  
Marine Magnetic Anomalies ◽  
Increasing Trend ◽  
Reversal Frequency ◽  
Spreading Rates ◽  
Sea Floor Spreading ◽  
Central Atlantic ◽  
Stage Boundaries

Magnetostratigraphic correlations of biostratigraphic stage boundaries have established calibration points for dating the polarity reversal sequence derived from marine magnetic anomalies. Interpolation between the best-estimate ages for these tie points gives a revised magnetic polarity timescale for the Cainozoic and Cretaceous. Recomputed sea-floor spreading rates for this time prove to be high during the Cretaceous quiet interval at several plate margins, but remained remarkably constant in the central Atlantic. The geomagnetic reversal frequency, when averaged over intervals of several megayears duration, has exhibited a steadily increasing trend since the late Cretaceous.

Geochemical discriminators and the palaeotectonic environment of the North Mountain basalts, Nova Scotia

1980 ◽  
Vol 17 (12) ◽  
pp. 1740-1745 ◽  
Author(s):  
J. M. Wark ◽  
D. B. Clarke
Keyword(s):  
Nova Scotia ◽  
Continental Crust ◽  
Early Jurassic ◽  
Late Triassic ◽  
Chemical Characteristics ◽  
Sea Floor ◽  
The North ◽  
Sea Floor Spreading

The late Triassic – early Jurassic North Mountain basalts of Nova Scotia have been analyzed for various elements believed to be useful in determining the palaeotectonic environment of eruption. The discriminant diagrams show these basalts to have within-plate affinities, with a possible indication of oceanic chemical characteristics. An oceanic environment, however, is at variance with the field relations, which show the within-plate environment to be continental; thus the oceanic chemical characteristics may suggest eruption through a continental crust that was thinning prior to the onset of active sea-floor spreading later in the Jurassic.

Episodes of sea-floor spreading recorded by the North Atlantic basement

1971 ◽  
Vol 12 (3) ◽  
pp. 211-234 ◽  
Author(s):  
P.R. Vogt ◽  
G.L. Johnson ◽  
T.L. Holcombe ◽  
J.G. Gilg ◽  
O.E. Avery
Keyword(s):  
North Atlantic ◽  
Sea Floor ◽  
The North ◽  
The North Atlantic ◽  
Sea Floor Spreading

The role of fracture zones in sea floor spreading

1973 ◽  
Vol 78 (32) ◽  
pp. 7776-7785 ◽  
Author(s):  
Christopher G. A. Harrison ◽  
Mahlon M. Ball
Keyword(s):  
Fracture Zones ◽  
Sea Floor ◽  
Sea Floor Spreading
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