Any Idea What This Is ??

[ivy_walls]

I found this peculiar looking rock one day and have been wondering for a long time what it is. Any ideas would be appreciated.

 

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[jeff of pa]

Not my area of Expertese, But

are you sure it's a Rock ?

It reminds me of Bone by the shape.

or something Molded (Clay ?)

Is it Heavy ?

 

[ivy_walls]

it feels like a rock ..... definitely not clay.
weight seems kind of rock-ish.
??

 

[Wetgreenie]

I would guess was a rock composed of different materials.
One harder one softer then eroded by wind or water.

 

[Bebop]

It looks like a cast of a hole or a burrow filed with minerals to me.

 

[Kansas]

We have many of those (or ones that look similar to yours) in my area.
A State Geologist told me that they were sediment of a dried up sea or lake bed. If you are ever around a dried up pond or lake that is all cracked up, check it out, I think he is right.

~Kansas~

 

[Bax]

it`s easy - sandstone