Possible Role of Transform Faults in the Development of Apparent Offsets in the Ouachita-Southern Appalachian Tectonic Belt
| Autor: | S. E. Cebull, L. R. Russel, G. R. Keller, D. H. Shurbet |
|---|---|
| Rok vydání: | 1976 |
| Předmět: | |
| Zdroj: | The Journal of Geology. 84:107-114 |
| ISSN: | 1537-5269 0022-1376 |
| DOI: | 10.1086/628177 |
| Popis: | An apparent offset between the Marathon Mountains and the buried western extension of the Ouachita Mountains, and another between the Ouachita and southern Appalachian Mountains have been the subject of numerous and variable interpretations. Here, they are explained in terms of plate-tectonic theory, as previously applied to the Ouachita and southern Appalachian systems. The presently exposed tectonic belt lies somewhat north of the boundary between continental crust and upper mantle to the north and oceanic crust and upper mantle to the south. This boundary is interpreted as a Paleozoic plate margin. Apparent offsets in the boundary and in the tectonic belt are thought to represent the location of former trench-trench (or arc-arc) transform faults which allowed subduction and subsequent orogeny to take place in en echelon fashion along an irregular Precambrian-Paleozoic North American continental margin. The irregularity of continental-margin shape may be a result of supercontinent (Pangaea I?) fragmenta... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|