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Mason Hintermeister posted a new activity comment 1 year, 7 months ago
1 year, 7 months ago1 year, 7 months ago@stray-gru Nice find! This appears to be a mosasaur jaw, an extinct predatory giant aquatic lizard from the time of the dinosaurs. If you post a picture with a scale (ruler or coin) then I will be able to mark it research grade!