Maine Geological Survey
Schist has blocky aggregates of coarse sillimanite in pseudomorphs after andalusite. Schist alternates with metamorphosed quartz-rich sandstone beds. Locally, there is a weak axial plane cleavage related to the folds, particularly in the schist.
Project Name: Bald Mountain, Camden
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sillimanite; pseudomorph; schist; fold; axial plane cleavage
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