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- Posts: 49
- Joined: Tue Aug 28, 2012 6:59 am
- Location: Conifer, CO
The gold colored cubes were likely pyrite. Pyrite can be found with galena and siderite so that makes sense. Another way to distinguish pyrite from galena would be the fracture pattern. Pyrite has a conchoidal fracture, looks like glass with the curved pattern when broken. Galena has cleavage so it looks like steps when broken. You can look at geologic maps and journal articles on the USGS website (www.usgs.gov
). It's not the easiest site to navigate, but you may find some good maps of the area. Also check out the book Roadside Geology of Colorado, despite the fact that it mostly focuses on road cuts its gives some great info on local geology throughout the state. I love this book, but I'm a huge geology dork too. Glancing through my copy at a couple of the areas I suspect you were near I think it would have some of the info you're looking for. The Audubon society of North American Rocks and Minerals is another good resource for identifying rocks and minerals.
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