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sierrahotel117

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Just moved 40 to the SE of Yellowstone National Park in NW Wyoming. We have been finding these in the excavation of the house. They are located in a greenish clay layer just above a rocky layer approximately 12 feet below the surface. They are sedimentary balls that, when broken open, have a smaller, more hard type of rock or maybe fossil inside. We find them in different sizes from 4-12 inches in diameter. Any help would be much appreciated.

 

 

Edit - I believe they are rare double concretions. 5edef90c4d5b7_IMG_7717(3).thumb.JPG.e08b2f31d2dfb5c2b9f8fa4a3f4e8407.JPG

Edited by sierrahotel117
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2 hours ago, sierrahotel117 said:

I believe they are rare double concretions.

Concretions yes. Rare, double, not so much.

It's possible there are fossils inside, but I sort of doubt it.

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I agree with the "not rare" assessment. 

Concretions are by nature made up of numerous concentric layers.

Sometimes the inner layers are harder, than the outer layers, sometimes they are softer. 

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    Tim    -  VETERAN SHALE SPLITTER

   MOTM.png.61350469b02f439fd4d5d77c2c69da85.png      PaleoPartner.png.30c01982e09b0cc0b7d9d6a7a21f56c6.png.a600039856933851eeea617ca3f2d15f.png     Postmaster1.jpg.900efa599049929531fa81981f028e24.jpg    VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png  VFOTM  --- APRIL - 2015  

__________________________________________________
"In every walk with nature one receives far more than he seeks."

John Muir ~ ~ ~ ~   ><))))( *>  About Me      

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