Stumped by an Interesting Rock

[Jimp100]

I found this rock in a phosphate mine in Aurora, NC and when I split it open, found the unique, spherical construct in the center. Any idea what kind of stone it may be? Thanks!

 

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[Bruce R]

Not to sidetrack anything, but I've always wanted to go to the Aurora area to hunt megalodon teeth, any info on that ? You cam PM me .

 

[tamrock]

Maybe a type of magnesium nodule

 

[kcm]

I will never cease to be amazed at what Ma Nature can create!!

 

[Back-of-the-boat]

I wonder if it isn't a thunder egg.

 

[Jimp100]

Aurora, NC is known for the digs from their phosphate mines. They have a nice museum in the middle of town with a great historical, panoramic relief on the wall depicting the rise and fall of the ocean level from as far inland as Richmond to as far out to sea as about 30 miles. Sharks teeth have been dug up as far as Richmond, and Indian artifacts have been found far out off-shore. It used to be called normal rise and fall due to the ice ages. Today we call it global warming. I think it's a bit of both. Anyway, their museum has great teeth that have been found in the phosphate mines. This upcoming weekend, they are celebrating the holiday weekend by trucking in loads of material from the mines that they let folks go in and sift for sharks teeth, fossils, etc. My wife and I are taking our tools and joining the dig.

 

[Bruce R]

Cool, keep us posted, those are treasures too !

 

[Jimp100]

I think you are correct. After considering how it sparked when I split the rock, and the smell that came off it when it was split and sparked, I have to believe it is definitely a form of magnesium. It is interesting how the module formed in the middle of the stone. Thanks!