float
n.— «Ms. Trujillo, who wears a leather holster belt holding a rock hammer, and geologist’s compass, tells them that if they find “float”—the term for loose fossils individually scattered over the ground by water erosion—they should look up the slope to find the possible source and tie a ribbon there.» —“Dinosaurs are gone, but their bones are all about” by Don Hopey in Rock River, Wyoming Pittsburgh Post-Gazette (Pennsylvania) June 24, 2007. (source: Double-Tongued Dictionary)
Further reading
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