Mundane properties of Shaman Stones
Geology: These stones are one of natures oddities. Cut one through the middle and you will reveal a hematite shell with a solid sandstone centre. The outer shell of hematite (iron oxide) congealed around a sandstone centre which may be stained in red or yellow from the iron oxides leaching into the sand. Occasionally there are extra rings of hematite in the centre. Shaman stones are also known as Navajo cherries, Indian marbles or just plain balls.
They are formed in the lower part of the Navajo Sandstone Formation found predominantly in Southern Utah and Northern Arizona. Part of this formation was laid down approximately 190 million years ago at the commencement of the Jurassic era. While we know when, where and what they formed from, there is yet little geological information to provide an explanation on how these stones came into being. It is highly likely that they were formed at a time when the original sand dunes, now the Navajo Sandstone formation, were underwater.
The iron in Shaman stones may originally have been a substance called Limonite which is a hydrous ferric iron oxide. This type of iron oxide is known to form a gel when under pressure. The sand in the Navajo formation ranged between 300 – 600 metres (1000-2000 feet) deep with a sea above it. At these depths there would have been a tremendous amount of pressure produced; possibly enough to cause the limonite to form a gel. We also know that heat can change Limonite to Hematite, which is a stable form of Iron oxide. This then solidified around a core of compressed sand and in theory, this could be how Shaman stones were created
theres some maybe and could be in this article. try to research, but could not find alot of info.
late commer here but the i thought i might put my 2 cents worth in, the first point is a jetta, the deep bifurcation without the basal thinning of pedernales coupled with ground outer edges of the "legs" is a classic jetta rework, the next one appears to be one also although worn out, look for an un reworked one they are awsome! hope it helps. ron
First picture looks like mighty good day worth of finds.
Second picture appears to be Jetta in type.
Third picture, an exhausted point of some type.
Fourth Picture appears Darl.
Last picture, just as you called it and used as ????.
Thanks for the reply Sandman. I noticed in Turner/Hester's latest book edition, they dropped the Hare Biface as a type for some reason. Perhaps they now view the Hare Biface as a preform of a type that was never completely finished?