
The huge stone at the bottom left of the Tbird sign is the geode.
The Muddy Creek I was thinking of is a canyon carver over in the Swell.
Here in central Indiana, it is FLAT! Scraped that way by the last ice sheet to push it’s way south.
As it came by, it brought gaZillions of broken rocks chunks from Canada and we now grow them in our farm fields. The farmers have collected all types of stuff over the years and have piled them in the corners of their lots. (it’s REALLY good for the aggregate business!)
I have made smaller ones as I’ve piled brush and logs on them to burn; spliting them by the heat.
In the southern portion of the state, eroded by the melted runoff, we have lots of geodes in the stream beds where they have collected.