Yellowstone Sinter
Look at the photo...what is there not to like about these rocks?? I am completely in love with them. I love to look at the things that are not so obvious to us. The gravel we walk on everyday has so …
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Canadian Gneiss from New York State
These rocks are very smooth and rounded, nice to hold in the hand. I coated both of them with clear nail polish to help bring out the colors. &nb…
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Manhattan Schist
Manhattan Schist is Devonian in age. It has undergone at least 4 well-defined stages of deformation and is very strongly deformed in most exposures. The photo shows a glacially smoothed surface exhib…
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Ultramylonite from Scotland
Everything! It's significance in terms of recording of extreme deformation, which must have occurred at depth within the crust given the paragenesis, the lack of any significant retrogression in spit…
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Antietam Quartzite, Virginia
The long narrow lines in this rock are the fossil tubes of Skolithos linearis worms. While fossils are uncommon in metamorphic rocks, this is an exception. It is believed that these were the homes of…
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Unakite, Virginia
The large colorful crystals of green epidote, and orangish-pink feldspar make unakite simple to identify. There is some controversy about its classification; some references say that it is a kind of …
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'Cannon Ball' Erratic
I have brought about one-half dozen rocks home over the years and this one is my favourite. It came out of the ground where I was setting a fox-trap years ago. I refer to it as 'my cannonball.' It's …
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Lynchburg greenstone, Virginia
This item came from my grandfather who was fascinated by rocks and fossils. It was probably an ash tray - he used it for that purpose - that was sold as a tourist item. When my parents cleaned out hi…
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Gneiss cobble
Absolutely everything. The contrasting minerals and the almost uniform banding of the 2 colors make this rock unique and interesting. I use this rock during my lecture about the metamorphic rocks in …
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Garnet gneiss
Large porphyroblasts of garnets(2-3 cm) in a mattix of biotite and quartz. Upon first look, the holes left by the garnet look like vesicles. These garnet form perfect crystals that can be hooked out …
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