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Earth sciences

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Early Paleozoic paleogeography of Laurentia and western Gondwana: evidence from tectonic subsidence analysis: comment and reply

Article Abstract:

Tectonic subsidence analysis, while a useful methodology in the timing of rift-drift transition, does not provide valuable insight on the time-space relations of continents. Thus, the use of tectonic subsidence to study the paleogeography of Laurentia and western Gondwana during the early Paleozoic is not recommended. The interpretation that the late Cambrian-Ordovician tectonic subsidence curve does not show any significant responsse to the docking onto Gondwana in the Ordo vivian and is also factually erroneous. The proposed paleogeographic scenario is also questioned.

Research, Geology, Structural, Structural geology, Gondwana (Geology), Gondwana, Paleogeography, Laurasia (Geology), Laurasia

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The early Paleozoic evolution of the Argentine Precordillera as a Laurentian rifted, drifted, and collided terrane: a geodynamic model: discussion and reply

Article Abstract:

Conclusions concerning the relation between the early Paleozoic biostratigraphy of the Precordillera of northwest Argentina and the Laurentian craton are discussed. Generally, there is consistency in the relationship although two aspects of the geodynamic model do not agree with the Argentine Precordillera rifting and drifting hypothesis. A detailed analysis of this geodynamic model is presented.

Models, Geology, Stratigraphic, Stratigraphy, Geodynamics

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Neoproterozoic-Paleozoic geography and tectonics: review, hypothesis, environmental speculation - discussions and reply

Article Abstract:

An exploration of Argentina's geological history is presented, focusing on the formation of the Precordillera. Theories include its origin as a part of the Texas plateau versus its origin as an open ocean outboard from the Ouachita facies.

United States, Argentina, Analysis, History, Geological research, Mountains, Plateaus

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