Help IDing These Stone Nodules from Missouri

MObushwhacker

Full Member
Feb 20, 2010
102
18
Scott County Missouri
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These stones or found along gullies that have washed away the clay material leaving them exposed. There are no other stones present and some of theses stone can be seen embedded in the clay itself. Most of the nodules have a navel as outlined in the pictures the insides is a solid granular material and minimum brown in color. The closes thing that I have seen representing there appearance is watching the shapes produced by a lava lamp. Any help will greatly appreciated.
 

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GopherDaGold

Silver Member
Dec 12, 2009
2,817
3,356
St. Charles County, Missouri
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They look like petrified sweet potatoes. Or poo.
 

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claymation

Jr. Member
Oct 14, 2007
64
3
NM
Primary Interest:
Relic Hunting
yeah, they look just like moqui stones or moqui marbles. From Missouri ? I thought they are from Utah, I guess they can be found anywhere the conditions are right.
 

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Yoop

Greenie
Dec 25, 2009
13
2
Upper Peninsula of Michigan
They are called concretions. Those are most likely calcareous concretions. Actually "sand" with a calcareous cement.

See links:

http://www.priweb.org/ed/concretions.htm (scroll down)

There is a diverse variety of concretions, in shape, material and inner contents. Some concretions have formed around fossils and, commonly , fossil ferns.

Concretions are common in certain areas of Missouri.

Google "concretions" to see the numerous varieties and shapes. Some can get quite large.
 

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mamabear

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Feb 21, 2008
3,071
869
SE Missouri
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I'm in Bollinger co. & have a lot of those here too. do you find many fossils in Scott co? 'posed to be some good ones.
 

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