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Show us your reworked fossils or fossil-bearing breccia/conglomerate
FranzBernhard posted a topic in General Fossil Discussion
I am starting this topic because of this one: Would you like to show off your examples of reworked fossils still located in younger matrix or conglomerate/breccia with fossil-bearing clasts. I am quite eager to see some nice examples. I have only one, most of you may already know this : One of the clasts contains Eifelian corals. Thanks you very much!! Franz Bernhard- 6 replies
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Hello to you all! This is my first post here. Collecting rocks and minerals is a hobby of mine, also lapping/cabbing/faceting. I picked up this stone in Romania, Harghita county. It seemed interesting so I lapped 4 sides (last 4 photos attached). Then I polished all of it. Then I took some photos, 5 of them attached (there is a strip of laser printed paper, with 1 mm grid, included in each one of them). This stone has 70 mm in the longest dimension; 2.77 specific gravity; was 330 grams before lapping. Most of material should be carbonates; it dissolves in vinegar with gas bubble production. The stone is, I guess, a breccia. A polymictic breccia. A multi-generation breccia: some clasts are breccia-in-breccia. Many clasts look sedimentary. The variety of clasts is puzzling, at least to me. If the photos attached are not puzzling, I have more to show. Hydrothermal alteration could be involved. Ancient sea bed could be involved (Transylvania was a sea, once). Rock melt and re-crystallization could be involved, or meteorite bombardment. I have no idea. The main feature of interest here is the 1-mm diameter "wheel" with "spokes", & co. Is it a fossil? Have you ever seen something like this?
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