curred, this shielding depth may not have been constant. Third, specimens whose orientation has not changed during the exposure history must be identifiable. We repeat the acknowledgement of Faure and Taylor in this issu

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• Nussbaum Riegel
• Meserve Glacier
• Goodspeed Glacier
• Asgard Range
• McMurdo Dry Valleys
• Geography of Antarctica
• Sollas Glacier