Notes: This is a medium grained sandstone from the Dalkjegla Member with several chamosite ooids with opague cores. Ooid horisons occur at about the same stratigraphic interval at three widely separated localities suggesting a regionally extensive facies, and distinctive near surface diagenetic conditions. Ironstone ooids have been associated in the literature with volcanic activity, and these may in some way be related to HALIP, although our thinking has evolved beyond that.

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