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A Carboniferous flora from the Surprise Canyon Formation in the Grand Canyon, Arizona
Published online by Cambridge University Press: 20 May 2016
Abstract
A megafossil flora, composed of 12 form taxa, has been collected from the Upper Mississippian–Lower Pennsylvanian Surprise Canyon Formation in the Grand Canyon, Arizona. It is the first known flora of this age to be recorded in Arizona, and includes Lepidodendron aculeatum Sternberg, L. mannabachense Presl, L. volkmannianum Sternberg, Lepidostrobus sp. cf. L. ornatus Brongniart, Lepidostrobophyllum sp., Knorria sp., Cyperites sp., Stigmaria ficoides (Sternberg), Calamites (Mesocalamites) cistiiformis Stur, Calamites sp., Pecopteris cf. P. aspera, and Wardia sp. (seed). The 22 species of palynomorphs previously reported from this formation suggest that the local flora was more diverse than the paucity of plant megafossil specimens indicates.
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