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a Trough E, showing the stacked, crescentic, modally graded layers. Note that the layers extend for varying distances into the surrounding homogeneous unbanded gabbro. b View of Trough G looking along the axis towards the intrusion centre. In the foreground, the modal layers are dominated by mafic phases (oxides, olivine and clinopyroxene), whereas in the middle ground, the modal layers are dominated by plagioclase. The trough dies out towards the background
