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Comparisons are being made with similar remains published by Yoshitaka Yabumoto and Teruya Uyeno
In the altered core
Hemisphaerocoryphe
Late Maastrichtian (Cappetta
21571 - Association Quartz + Galena + Pyrite + Barite Crystals - Alnif (Morocco) Calamopleurus Comparisons are being made withQuartz is a mineral composed of silicon and oxygen atoms in a continuous framework of SiO4 siliconoxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. The mineral pyrite, or iron pyrite, also known as fool's gold, is an iron sulfide with the chemical formula FeS2 (iron(II) disulfide). Pyrite is
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