THE AMMONITE BONANZA
You barely have to dig half a meter deep into the soil to get to the famous ammonites of Schlaifhausen. For decades, collectors and dealers dug tons of the chunks out of the ground there, which consisted almost exclusively of ammonites of the genus Dactylioceras.
Although the classic site has now been practically exploited, it is quite possible that other similar sites will be discovered in the future.