Carbonate–sulphate–redbed facies and cyclic sedimentation of the Windsorian Stage (Middle Carboniferous), Maritime Provinces

摘要: After the late Devonian orogeny, thick Carboniferous, mainly continental redbeds, derived from intrabasinal horsts, accumulated in a complex rift-valley system called Fundy basin. During mid-Carboniferous Windsorian Stage, generally hypersaline seas flooded repeatedly into tortuously interconnected, grabens. The resulting carbonate–sulfate blankets intertongue laterally with increasingly coarser redbeds and even basalt adjacent to horst. Macrofaunal, microfaunal, insoluble residue, heavy-mineral, trace-element analyses Irwin-logs have limited success identifying remnants of each particular blanket. Nevertheless, facies model is constructed detail microscopy Recent analogues, including field work Bermuda.Windsorian carbonates are shallow marine supratidal; calcium sulfate diagenetic supratidal, precipitated within, not on, subaerial salt flats; diagenetic, pigmented by post-depositi...