 | | Journal (article/letter/editorial) | | Mineralogy and Geochemistry of Agates from Paleoproterozoic Volcanic Rocks of the Karelian Craton, Southeast...Southeast Fennoscandia (Russia) Evgeniya N. Svetova * and Sergei A. Svetov Institute of Geology KarRC RAS...RAS, Petrozavodsk 185910, Russia; ssvetov@krc.karelia.ru * Correspondence: enkotova@rambler.ru Received:...December 2020 Abstract: Agates of Paleoproterozoic volcanics (2100−1920 Ma) within...widespread in the lavas gas vesicles, inter-pillow space of basalts, picrobasalts, basaltic andesites, as well |  | | Book | | Genesis Edited by Galina Palyanova Printed Edition of the Special Issue Published in Minerals www.mdpi...Siberian Branch of the Russian Academy of Sciences Russia Novosibirsk State University Russia Editorial Office...Alban-Anlage 66 4052 Basel, Switzerland This is a reprint of articles from the Special Issue published online...ISBN 978-3-0365-2184-8 (PDF) Cover image courtesy of Galina Palyanova © 2021 by the authors. Articles...ensures maximum dissemination and a wider impact of our publications. The book as a whole is distributed |  | Svetova, Evgeniya N., Chazhengina, Svetlana Y., Stepanova, Alexandra V., Svetov, Sergei A. (2021) Black Agates from Paleoproterozoic Pillow Lavas (Onega Basin, Karelian Craton, NW Russia): Mineralogy and Proposed Origin. Minerals, 11 (9) 918 doi:10.3390/min11090918 | Journal (article/letter/editorial) | | Pillow Lavas (Onega Basin, Karelian Craton, NW Russia): Mineralogy and Proposed Origin Evgeniya N. Svetova...Svetov Institute of Geology, Karelian Research Centre of RAS, 185910 Petrozavodsk, Russia; chazhengina@mail...first detailed investigation of black agates occurring in volcanic rocks of the Zaonega Formation within...Fennoscandian Shield). Three characteristic texture types of black agates were identified: monocentric concentrically...and moss agates. The silica matrix of black agates is only composed of length-fast and zebraic chalcedony |
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