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Science 7 June 1991:
Vol. 252. no. 5011, pp. 1409 - 1412
DOI: 10.1126/science.252.5011.1409
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Articles

Did the Breakout of Laurentia Turn Gondwanaland Inside-Out?

PAUL F. HOFFMAN 1

1 Continental Geoscience Division, Geological Survey of Canada, Ottawa, Ontario, K1A 0E8

Comparative geology suggests that the continents adjacent to northern, western, southern, and eastern Laurentia in the Late Proterozoic were Siberia, Australia-Antarctica, southern Africa, and Amazonia-Baltica, respectively. Late Proterozoic fragmentation of the supercontinent centered on Laurentia would then have been followed by rapid fan-like collapse of the (present) southern continents and eventual consolidation of East and West Gondwanaland. In this scenario, a pole of rotation near the Weddell Sea would explain the observed dominance of wrench tectonics in (present) east-west trending Pan-African mobile belts and subduction-accretion tectonics in north-south trending belts. In the process of fragmentation, rifts originating in the interior of the Late Proterozoic supercontinent became the external margins of Paleozoic Gondwanaland; exterior margins of the Late Proterozoic supercontinent became landlocked within the interior of Gondwanaland.

Submitted on January 4, 1991
Accepted on March 14, 1991


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(2002)
Journal of Paleontology 76, 692-708
Geochemical investigation of a Neoproterozoic glacial unit: The Mineral Fork Formation in the Wasatch Range, Utah.
G. M. Young (2002)
Geological Society of America Bulletin 114, 387-399
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Baltica upside down: A new plate tectonic model for Rodinia and the Iapetus Ocean.
E. H. Hartz and T. H. Torsvik (2002)
Geology 30, 255-258
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Grenvillian continental collision in south China: New SHRIMP U-Pb zircon results and implications for the configuration of Rodinia.
Z.-X. Li, X.-h. Li, H. Zhou, and P. D. Kinny (2002)
Geology 30, 163-166
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Pre-1 Ga (pre-Rodinian) ophiolites: Their tectonic and environmental implications.
E. M. Moores (2002)
Geological Society of America Bulletin 114, 80-95
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The spatial and temporal diversification of Early Palaeozoic vertebrates.
M. P. Smith, P. C. J. Donoghue, and I. J. Sansom (2002)
Geological Society, London, Special Publications 194, 69-83
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Petrogenesis of Neoproterozoic Granitoids and Related Rocks from the Seychelles: the Case for an Andean-type Arc Origin.
L. D. ASHWAL, D. DEMAIFFE, and T. H. TORSVIK (2002)
J. Petrology 43, 45-83
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Detrital zircon provenance of Mesoproterozoic to Cambrian arenites in the western United States and northwestern Mexico.
J. H. Stewart, G. E. Gehrels, A. P. Barth, P. K. Link, N. Christie-Blick, and C. T. Wrucke (2001)
Geological Society of America Bulletin 113, 1343-1356
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West African proximity of the Avalon terrane in the latest Precambrian.
A. K. McNamara, C. M. Niocaill, B. A. van der Pluijm, and R. Van der Voo (2001)
Geological Society of America Bulletin 113, 1161-1170
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Rotund versus skinny orogens: Well-nourished or malnourished gold?.
R.J. Goldfarb, D.I. Groves, and S. Gardoll (2001)
Geology 29, 539-542
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Du Toit Memorial Lecture 1999: The Mozambique belt of East Africa and Madagascar: significance of zircon and Nd model ages for Rodinia and Gondwana supercontinent formation and dispersal.
A. Kroner (2001)
South African Journal of Geology 104, 151-166
   Abstract »    Full Text »    PDF »


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