Neoproterozoic stratigraphic comparison of the Lesser Himalaya (India) and Yangtze block (south China): Paleogeographic implications
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- 1 January 2003
- journal article
- Published by Geological Society of America in Geology
- Vol. 31 (10) , 917
- https://doi.org/10.1130/g19790.1
Abstract
Recent studies of terminal Neoproterozoic rocks (ca. 590-543 Ma) in the Lesser Him- alaya of northwestern India and the Yangtze block (south China) reveal remarkably sim- ilar facies assemblages and carbonate platform architecture, with distinctive karstic un- conformities at comparable stratigraphic levels. These similarities suggest that south China may have been located close to northwestern India during late Neoproterozoic time, an interpretation permitted by the available, yet sparse paleomagnetic data. Additional parallels in older rocks of both blocks—similar rift-related siliciclastic-volcanic successions overlying metamorphic basement, and comparable glaciogenic intervals of possibly Stur- tian and Marinoan or Varanger age—suggest that this spatial relationship may have de- veloped earlier in the Neoproterozoic. With the exception of basal Cambrian phosphorite and comparable small shelly fossils, stratigraphic contrasts between northern India and south China and increasing biogeographic affinity between south China and northwestern Australia suggest that south China may have migrated toward northwestern Australia during the Cambrian.Keywords
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