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Geology, Geodes, Fossils & Meteorites
- Thread starter Ken S.
- Start date
That's a nice specimen. Tourmaline was the favored gemstone of the Maya. I bought a tourmaline ring in Mexico last month which is a peach color in sunlight but green in artificial light.
It doesn't really look like a meteorite, to me it looks like the interior of a concretion. They frequently have very high iron concentrations and can be surprisingly dense. The slight magnetism may be due to magnetite (Fe3O4) on the surface..
On a meteorite, the black fusion crust is usually the first thing to weather off, the interior then slowly weathers to iron oxide. Your specimen appears unweathered on the exterior and oxide (hematite, Fe2O3, or limonite FeO(OH)-nH2O) on the interior.
I probably sounded like Isaac on the Orville with that, but I tend to use very precise and technical language when doing an analysis. Just the way I am.
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People have been posting interesting geology photos, so I thought I would join in. This is a polished cross section from the Allende meteorite.
Allende fell Feb 08, 1969 near Allende, Chihuahua, Mexico. Over two tons of material were found and extensively studied. It is classed as a carbonaceous chondrite, due to the chondrules in the interior. These are the round particles, which are primordial interstellar dust. These chondrules are actually older than the age of the Earth. It is considered one of the best preserved carbonaceous chondrites.
Allende fell Feb 08, 1969 near Allende, Chihuahua, Mexico. Over two tons of material were found and extensively studied. It is classed as a carbonaceous chondrite, due to the chondrules in the interior. These are the round particles, which are primordial interstellar dust. These chondrules are actually older than the age of the Earth. It is considered one of the best preserved carbonaceous chondrites.
That makes sense. I'm going to keep it with my collection as I have had it for about 40 years. Thank you for the info. I had to google Isaac on the Orville to figure out that that meant. Geologists - all scientists - should use very precise and technical language and I appreciate it.
That looks a lot like my specimen. I actually hiked down to the bottom of the crater (the one near Flagstaff) back in the 1970s. The Park Service doesn't allow people to do that anymore so I'm glad I had a chance to do it.
Nice! I'm not sure what the big birds and conversion tables mean. LOL
I'm going to start photo'ing some of my collection and post them, too. My husband showed me how to do that the other day.
How, specifically, do I access this to view or upload? A search of "geology" in the media area turns up no results.
Never Mind, I figured it out.
I have a small rock and mineral collection. My largest specimen is calcite on smokey quartz that's valued over $100. I won it as a door prize at a rock and mineral show.
You have some really nice specimens. I'm going to photograph some of my collection, too.
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