@linda-lewis, @vperez Here in the Cincinnatian we often see glacially or stream transported fossils of younger ages . Fossils that are found in streams are always suspect as to exact origin as they could be newly exposed and “local” or transported and “alien”. Usually the transported ones are heavily worn like your horn coral but not always. Surprisingly, one of our members found a perfect Phacops trilobite in matrix that had been transported all the way from Toledo in the northwest part of the state.
Jack