Need id

[infotraker]

Found this at Folsom Lake today, any idea what it might be ?

I pulled it out of the cemented gravels.

 

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[creskol]

need more info and photos

 

[calisdad]

My guess is it's a ball from a ball mill. cool find.

 

[turtlefoot13]

Looks almost like a Moqui Ball or something similar.

 

[cti4sw]

Maybe a geode? Crack it open.

 

[kuger]

if its stone its a nodule/geode,very common in Tertiary river gravels

 

[mudd]

is the lake almost empty?? theres a lot of old mining stuff around there