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The Basal Strathcona Fiord Formation (Middle Devonian) at Stenkul Fiord, Southern Ellesmere Island, Canadian Arctic Archipelago: A Record of Prolonged Tidal Flat Conditions
The basal Strathcona Fiord Formation (early to mid-Eifelian) at Stenkul Fiord, southern Ellesmere Island, represents a tidal-flat dominated, paralic setting. Depositional conditions, ranging from shallow sub-tidal to supra-tidal evaporitic mud flats are represented. Detailed facies analysis permits the isolation of genetically distinct horizons, or mini-sequences, within lagoonal, mixed flat, and mud flat deposits representing temporal variations in depositional conditions. Tidal channel deposits are noticeably scarce, indicating that the tidal flats consisted principally of interchannel areas. Rare intervals, constituting a gradual unidirectional shift through the entire intertidal zone, suggest a 3 m (mesotidal) paleotidal range. The +200 moftidal flat deposits indicate that sediment supply kept pace with subsidence over a prolonged period of time.
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