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Thin section registers, are records of the Musuem's microscope slides of rocks, minerals, and fossils. In Petrology, many of these slices of rock were prepared at a standard 0.03 mm thickness for examination under a polarising microscope. The slides have a standard prefix of ‘AM’, but for rocks and minerals this was discontinued many years ago to in place of the D. or DR. number of the specimen. For the Palaeontology collection, many slides were made for fossil corals.

This expedition is part of the Australian Museum's Collection Enhancement Project (CEP). The CEP will result in new levels of access to the AM’s diverse collections, making digital images and meta data easily accessible to First Nations communities, scientists, researchers, students and individuals from Australia and abroad.