Ron Meyer and Jerry Gunderson had already spent decades collecting different items when they learned about the trilobites turning up in a quarry just outside Milwaukee in 1984. The two men, friends since childhood, took a trip to the active quarry site and spoke with the foreman about any fossils that might have been found.
Great Lakes Now
https://www.greatlakesnow.org/2021/09/fleshy-quarry-fossils-wisconsin-watery-past/