Tectonic evolution of Proterozoic Australia

Article Abstract:

Proterozoic Australia comprises numerous fragments of continental crust that reveal a dynamic history of repeated union and dispersal. The main crustal components of Proterozoic Australia are the North, South, and West Australian cratons. They were first assembled as parts of three separate continents around 1830 Ma. Their union as an early component of the Rodinian Supercontinent occurred at around 1300 Ma. Intracratonic deformation related to the breakup of Rodinia after 750 Ma led to the rifting apart of Laurentia and Gondwanaland, and the formation of the Palaeo-Pacific Ocean.

Research, Australia, Plate tectonics, Proterozoic Eon

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Estudio Sismico de la Corteza Iberica Norte 3.3: a seismic image of the Variscan crust in the hinterland of the NW Iberian Massif

Article Abstract:

The Estudio Sismico de la Corteza Iberica Norte Project involves the examination of the Northwestern Iberian Variscan Belt using an offshore vertical incidence reflection seismic method and on-land wide-angle recording. Two important sedimentary basins were identified in the marine seismic section's shallow part. A low continental crust model also shows that the deepest of the two controversial highly reflective subhorizontal bads observed may be the remnants of a crustal root during the late Paleozoic period.

Usage, Iberian Peninsula, Paleozoic Era, Seismic reflection method, Seismic reflection surveying

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