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I'm tom! I hail from the west side 'o' Chicago. I'm going to school to be an archaeologist. I get a kick out of vidya games and comic books and other rather obscure MISCELLANY. Sometimes I do stuff. Or I don't. Then, I blog about it here!

cennoreth:

Prairie du Chien Chert (page is materials M-Z, so scroll down a bit for PDC entry)

Part 2: variety 2

The second variety of PDC is not as easily distinguished. It occasionally has a banding or grain, but this also occurs in Red River Chert. Because the distribution of these two materials does not overlap to a significant degree, they may still be distinguished based on the location of the site. The banding in this variety of PDC is contorted, somewhat like wood grain in a knot.

It’s not the easiest thing to see because of the color, but the flake in the second picture has a few vugs (little cavities in the rock) that are full of little quartz crystals. One is visible as a grey patch with some lighter spots on the right side of the flake, midway down the edge.

I don’t have an example of the third variety of PDC right now, hopefully that will change!

4 months ago
Viazomganthro
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    Prairie du Chien Chert (page is materials M-Z, so scroll down a bit for PDC entry) Part 2: variety 2 The second variety...
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