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Irregular Fenestrae in Bahamian Eolianites: A Rainstorm-Induced Origin
Roger J. Bain (1), Pascal Kindler (2) (*)
Fenestrae are primary or penecontemporaneous pores in the sediment framework that are larger than grain-supported interstices. These features have long been used to characterize peritidal environments and as a sea-level indicator in ancient successions. We report the occurrence of irregular (i.e., equidimensional) fenestrae in Pleistocene eolianites on San Salvador and Eleuthera (Bahamas), as much as 35 m above the coeval sea level. A rainstorm-induced origin is proposed as the mechanism for production of such voids in eolian deposits. We suggest that fenestrae should be used as a sea-level indicator only when they are associated with other intertidal or peritidal characteristics.
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