I need help with these geode like rocks I found these rocks in my pasture and was excited because I thought I had found some geodes.  The rocks were in a sandy bank and looked like eggs sticking out of the bank.  I am located in Ness County Kansas.


This is what they looked like after I opened them.  There are no crystals but some had a round ball in  the center.  Others were just empty centers.
Hi:  Your rocks are not geodes but likely concretions.  The wiki article even mentions concretions from Kansas though the concretions described don't to me fit what I see in the images.  Better pictures and more description about the rocks would lead to better identification.  See Better rock ID requests

Wiki's Concretion Page