Jotnian
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English
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Etymology
[edit](This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)
Adjective
[edit]Jotnian (not comparable)
- (geology) Belonging to the sediments of a group of Precambrian rocks more specifically assigned to the Mesoproterozoic Era (Riphean), and including the oldest known sediments in the Baltic area that have not been subject to metamorphism.