I visited the Russell Wildlife Area in Oskaloosa, Iowa yesterday. It is a series of old mine pits of Pennsylvanian, Pella rock. Reportedly, blastoids are found here. After spending 4 hours looking, I came up empty, at least in regards to the blastoids. Plenty of other marine finds. I am wondering if anyone has possibly visited the area and stumbled onto any blastoids? Is it a needle in the haystack, or was I looking in the wrong rock structure? Just curious in case a return trip ever occurs. @squalicorax, I noticed you hunted the area.
Mike