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Search found 54 matches |
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Linus Replies: 16 Views: 2826 |
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Congratulations to FMF and all of you who have worked hard to keep it going. If this news means that fmf will be with us for a good long time going forward, it is great news indeed! | |
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Linus Replies: 9 Views: 3200 |
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I have seen this style of agate from several locations, notably brazil and mexico. the "rutile" like features are actually strings of micro-bubbles. | |
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Linus Replies: 3 Views: 2375 |
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Bisbee supplied some of the most gorgeous velvety malachite on the planet, long since exhausted, alas... | |
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Linus Replies: 8 Views: 7817 |
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Tired of looking at those skinny clear nifontovites? For the size freaks out there, here's one of the plumpest single nifontovites Ive seen (single crystal near center right edge on the photo), 0.5&qu ... | |
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Linus Replies: 9 Views: 9052 |
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I like to hear of your three methods of dolomite formation. I'm particularly a fan and supporter of the third method you describe, which I have seen in the field in several important mineral districts ... | |
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Linus Replies: 2 Views: 4484 |
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I think its cool! Wonder whether parts of it fluoresce? | |
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Linus Replies: 17 Views: 12853 |
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Amir, I visited your quartz website, very nicely done! It really helps to clarify this situation. | |
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Linus Replies: 17 Views: 12853 |
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I see Fluorite cubes. Could you test the hardness?
I agree it looks like fluorite, I see a lot of 90 degree angles and almost no conchoidal fractures. A hardness test would be very useful - does g ... |
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Linus Replies: 31 Views: 20429 |
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Hi, I do think your image of mcrowrock3 shows a centralized protrusion - thus shell is a better explanation for the spherical bottom. shell or coral, either way, I still am leaning towards fossil. The ... | |
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Linus Replies: 31 Views: 20429 |
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Cretaceous age fossil corals are known from the San Antonio area of south Texas, and from north of Nuevo Laaredo, both approximately 200 kms from Zapata.I have enclosed a cross section drawing of a Cr ... | |
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Linus Replies: 31 Views: 20429 |
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I guess the real question is, "was this transported? or found in outcrop"? judging from all the eocene sediments surrounding zapata, tx and the pronounced rounding and abrasion of the item I ... | |
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Linus Replies: 31 Views: 20429 |
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oh come now, fossils can easily be preserved by silica (corals in the Horquilla Formation in Southern Arizona, petrified wood; and brachiopods on the Colorado Plateau; I have seen them preserved as we ... | |
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Linus Replies: 31 Views: 20429 |
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I agree - fossil. Most all concretions form concentric rings, the radial pattern is not at all typical of a concretion. | |
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Linus Replies: 1 Views: 13369 |
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Hi all! A couple months ago I ran across a brilliant old article by Rock Currier detailing one of his early trips to Rio Grande do Sul with lots of great photos. I can't find it now! Does anyone have ... | |
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Linus Replies: 5 Views: 5644 |
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just ran across this:
Boița is a commune in Sibiu County, Transylvania, Romania, at the foothills of the Cindrel Mountains, 22 km south of the county capital Sibiu |
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