Baggalútar from Hvalfjörður (Iceland): Enigmatic spheroids of hydrothermally altered basaltic tephra

• Main Author: Djuse, Emmie
• Format: Bachelor Thesis
• Language: English
• Published: Uppsala universitet, Mineralogi, petrologi och tektonik 2022
• Subjects: Baggalútar; Iceland; basalt; Hvalfjörður; zeolites; volcanic spherulite; spheroids; Island; zeoliter; vulkaniska sfäruliter; sfäroider; Geology; Geologi
• Online Access: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-477339

Baggalútar are well-rounded spheroids that typically measures 16-18 mm in size and have a brownreddish appearance. They can be found in the Hvalfjörður bay in SW Iceland. There are manydescriptions in literature and on the internet that Baggalútar are volcanic spherulites formed by quartzor cristoba...