Where the substratum is composed of a greater percentage of geologic materials than either biogenic or anthropogenic. Geologic substrata can be igneous, metamorphic or sedimentary particles of any grain size class.
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Where the substratum is composed of a greater percentage of geologic materials than either biogenic or anthropogenic. Geologic substrata can be igneous, metamorphic or sedimentary particles of any grain size class.
Authorised by the Executive Director, Institute for Marine and Antarctic Studies.
