Abstract
The La Flecha Formation (Cambrian-Ordovician boundary) from the Carbonate Basin of Argentina (South America) has a clear shallowing-upward cyclic pattern. Each cycle is formed by a subtidal unit and ends with a supratidal one. This sequence has a biosedimentary style with a great development of thrombolites and stromatolites. An ideal cycle is described in which the facies occur and the most usual vertical associations suggest that this sequence may be a protected ramp or an island model, which was accreted vertically and migrated laterally over a wide and protected area. The thrombolitic megastructure of Argentina are interpreted in terms of Cambrian-Ordovician global changes.
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References
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© 1994 Springer Science+Business Media Dordrecht
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Armella, C. (1994). Thrombolitic-Stromatolitic Cycles of the Cambro-Ordovician Boundary Sequence, Precordillera Oriental Basin, Western Argentina. In: Bertrand-Sarfati, J., Monty, C. (eds) Phanerozoic Stromatolites II. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-1124-9_16
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DOI: https://doi.org/10.1007/978-94-011-1124-9_16
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