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jamey said:the balls are cool,i thought maybe made by the ice that slide across the earth.but toms answer is pretty good,they put them in war clubs like this one found in ontario.,well this one might be a wood balled one but im sure they used rocks too<img src="http://www.treasurenet.com/forums/attachment.php?attachmentid=726942"/>
rock said:If you dont think they are artifacts you might want to break 1 open if you have a lot of them to see what is inside and how it is formed. I have found some in sandstone and also quartz but just not that many to risk it. Plus they arent big ones.
Ya ill have to see if he wants to do that.
Lots of examples from history exist. Yes, some from other countries too.
Arrowheads & Stone Artifacts: A Practical Guide for the Amateur Archaeologist - C. G. Yeager - Google Books
Round shot - Wikipedia, the free encyclopedia
Stone spheres of Costa Rica - Wikipedia, the free encyclopedia
Navajo Sandstone - Wikipedia, the free encyclopedia
Prehistoric Stone Balls--a Mystery | Natural History Magazine
Perfectly Round Stone Spheres in Diquis
Just wanted to add...we have several large phosphate mines in my state and in the dug material there is hundreds of perfect stone spheres. They are the result of bubbles caused by gases released by decaying matter in ancient sediment that solidified and over time minerals caried by ground water filled in the solidified space.
Not saying every stone sphere is one of these..just saying a sphere is a very natural shape.
This was found in colorado by a friend. Just wondering what it is. Its very heavy.
Today a neighbor brought over a large... very large sphere... that friends found in Colorado near Castle Pines. It appears to be made of a well silica cemented rhyolite or sandstone. It is resistant to weathering and has some loss of the original smooth surface with shallow flaking off to expose the silicified gritty stone used. It is not granite or metamorphic hard rock. When I saw your post I thought it interesting to add with your photographs. I asked if the friend was back in the general area again, to look for colored flakes or chips to give more evidence to add to the mystery.
In my college geology class, I remember the teacher mentioning that nearly perfectly spheroid igneous rocks can be formed when heated/softened material is ejected from a volcano with force and then travels through the air for quite some distance. He explained that simply flying through the air naturally shapes such material into a sphere while, at the same time, cooling the rock so that, by the time it hits the ground, it maintains its spheroid shape. I have found 2 basalt-type spheres here on the property where I live which is approx. 20-30 miles from a huge (now extinct) volcano (now called "Mount St. Helena") that we know erupted during the Tertiary period with such force that half of the mountain blew away and the surrounding native sequoia forest was immediately flattened and covered with ash -- thus creating Napa County's "Petrified Forest". I figure the spheres I found here probably came from there.