Notes: An average sedimentation rate of .03-.06 mm/year, lenticular bedding, a significant proportion of shale, the presence of glauconite , chamosite, siderite hardgrounds, and evidence of extensive reworking by storm waves, all indicate this was a relatively sediment starved shelf with grains in the surface environment for significant periods of time. In this context, the amount of plagioclase preserved is potentially puzzling. A simple answer may be that it was persistently cold. The presence of glendonites has been mentioned by previous workers. We found them throughout the upper portion of the Dalkjegla and most of the Innkjegla, suggesting maintenance of cold bottom waters. Given the relatively shallow depths, such temperatures should reflect regional climate. In this context it is also interesting to note that dinosaur trackways have been found in the Helvetiafjellet sands, suggesting even hardier dinosaurs or a local climatic change associated with the Carolinefjellet transgression.


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