Abstract
The Duntulm and Kilmaluag formations of the Middle Jurassic (Bathonian) Great Estuarine Group represent deposition in brackish-marine and fresh-brackish lagoons respectively. Deposition of ostracod valves at or near to the shoreline of these lagoons is described. Populations of Darwinula and Paracypris , composed almost entirely of carapaces of adults and older juveniles, are ascribed to storm deposition above the normal water level. Desiccation cracks and ‘cup-in-cup’ preservation, the latter indicative of wave reworking, are used to document fluctuations between subaqueous and subaerial conditions during deposition of the Kilmaluag Formation.
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