This is interesting:

Scientists Find Fossilized Fish That May Have Been Blasted by Debris From Asteroid That Ended the Dinosaur Age

When the asteroid hit the Yucatan 66 million years ago, it sent a tsunami of seawater up into North Dakota (not quite *that* impressive… the Western Interior Seaway stretched from the gulf of Mexico into Canada at the time).  sent earthquakes up as far as North Dakota that caused seawater from the Western Interior Seaway to slosh well inland. With the seawater went sea creatures; the sea water and critters ended up in local fresh water, mixing with fresh water fish. And the fish ended up breathing the tiny little glass spherules blasted into the atmosphere in their bajillions by the impact; the glass lodged in their gills in their final moments of life.

Edited for accuracy