Abstract
THE Serra Geral Formation consists of lava flows and is associated with dolerite dykes. It covers an area of about one million square kilometres in Uruguay and southern Brazil and is one of the largest volcanic masses in the world. From stratigraphic evidence its age could lie in the range from Upper Triassic to Upper Cretaceous; quite possibly it may be uppermost Triassic (Rhaetic) to Jurassic in age1.
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References
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CREER, K., MILLER, J. & SMITH, A. Radiometric Age of the Serra Geral Formation. Nature 207, 282–283 (1965). https://doi.org/10.1038/207282a0
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DOI: https://doi.org/10.1038/207282a0
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