I found this in the shallows yesterday while hiking around Lake Monroe south of Bloomington, Indiana. I've not had any luck so far finding a match online. I keep referring to as a corn cob because that's what it looks like to me (and, well, Indiana), but it would be helpful to know what it really is (if anything). I found a lot of crinoid stems/columns in the area as well, if that's of any assistance. I've included pictures of two sides and the base. Thank you for your help!