New PDF release: Plate Reconstruction From Paleozoic Paleomagnetism

By R. Van der Voo, C. R. Scotese, N. Bonhommet

ISBN-10: 0875905129

ISBN-13: 9780875905129

ISBN-10: 1118670256

ISBN-13: 9781118670255

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Published by means of the yankee Geophysical Union as a part of the Geodynamics Series.


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Paleomagnetieresultsfrom Morocco,Teetonophysies, 44, 91-114,1978. R. ,1_5, 409430, 1968a. , S. J. Shulik, J. B. A. Schmidt, Paleomagnetic poles for the Carboniferous Brush Creek Limestone and Buffalo Siltstonefrom southwesternPennsylvania,Phys. Earth Planet. , 25, 113-118,1981. , S. J. Shulik, B. A. Schmidt, J. Donahue, and H. B. Rollins, A Pennsylvanian positions- IX, _Geophys. J. R. ,1_•6, 207- (Conemaughian)pole position for the BrushCreek 224, 1968b. J. R. ,19, 305327, 1969. J. R. •0, 417429, 1970.

Still, no earlier than Cretaceous time has become too persistent, too conspicuous,too alarming to be disregarded any longer or to be explained away by subduction. Why should subduction have spared substantial amounts of Devonian-Carboniferous and Cretaceous rocks of a Tethys Ocean but not one trace of its Permian and Early Triassic record? It simply points to the non-existence of a Tethys Ocean in Permian-Early Triassic time. It also means that, if no Permo-Scythian Tethys Ocean and at best a Late Triassic incipient Tethys rift was available for subsequent subduction, opening of the Indian Ocean in Jurassic time cannot have been compensatedby Tethyan subduction.

The angular divergenceis in agreement with the suggestedleft-lateral displacement(Figure 8); complexfault system(Figures2 and 3). Finally, one should also mention that the distribution of the most anomalouspoles(G1to G10;Figure 5b) is similar to that explainedby MacDonald(1980)in terms of apparent tectonic rotation. The two Paleozoic results included in Table 2 are however, the divergence is mostly within the statistical errors of results. Furthermore, the pole for the Antimonio Formation (A) of Sonora and the Nazas from southernMexico (Figure 5).

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Plate Reconstruction From Paleozoic Paleomagnetism by R. Van der Voo, C. R. Scotese, N. Bonhommet

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