Proceedings of the Estonian Academy of Sciences, Geology |
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Abundant Abundant Ainsaar Aizpute allochthonous Amorphognathus tvaerensis apatite coatings apparatus authigenic Baltoniodus variabilis basal base bentonites Bergstrom 1971 biostratigraphy Biozone Branson & Mehl breccia C-rich coatings C-rich particles Cambrian conodonts cornuformis correlation cracked quartz grains crater interior crystalline cusp denticles depth diagenesis diagenetic Dictyonema shale Drepanoistodus drill-core Dzik Eesti Estonia Geol Hamar impact breccia impact crater Kallaste Kardla crater Kiipli & Kallaste Kivioli Kleesment Kohtla section Kukruse Stage Kuressaare lateral process lateral view Latvia limestone lithologies Mannik material mineral grains Nassumaa Nestor Nolvak Nurme Ohesaare Ordovician Osmundsberg Pb element PDF-quartz PDFs phosphate Phragmodus polonicus post-impact posterior process Present Present Present prioniodontid Promissum Puura Ruhnu sample D/E sample K3 sandstone sandy ejecta layer sanidine sanidine composition sedimentary sediments Semiacontiodus carinatus semisymmetricus Hamar species specimens stratigraphic studied surface Suuroja Tallinn University Tartu taxa Telychian text-fig thick thin sections tvaerensis Zone Upper Ordovician Valgu Velise Viira Viivikonna Formation Viki volcanic