Fossil Fish Scales Gallery
The Cretaceous era Coleraine Formation at Hill Annex Mine State Park in Calumet, Minnesota
preserves fossils from the inhabitants of the Western Interior Seaway and its shores.
The scales of bony fishes are rare but have survived both fossilization on the sea floor
and the mining activity that brought them back to the surface.
Fish scales have growth rings and these rings can be observed under a microscope.
In fact, these growth rings are one thing we look for to determine if a fossil is a fish scale.
The Hill Annex Mine Paleontology Project has access to advanced microscopes to image these fossils.
Please enjoy what are probably the most detailed images of fossil fish scales anywhere in the world.
Some American Cretaceous fish scales, with notes on the classification and distribution of Cretaceous fishes
By: T.D.A. Cockerell
A scale atlas for common Mediterranean teleost fishes
December 2016 Vertebrate Zoology 66(3):275-386
Zsuzsanna Bräger Timo Moritz
Wikipedia - Fish Scales
Wikipedia - Fish Species in the Western Interior Seaway