Title: Ignimbrite volcanism in the Ordovician Borrowdale volcanics of the English Lake District
Abstract: Summary Ignimbrites within the Borrowdale Volcanic Group predominantly occur in two situations; thick dacitic sheets associated with lavas of similar composition, and thin dacitic-to-andesitic units interbedded with basic-to-andesitic pyroclastic fall deposits. Mapping and examination of samples from the units has revealed petrological and chemical variations which can be attributed to the variations in components (crystals, fiamme and lithic fragments) and to post emplacement processes including crystallisation, ion-exchange with vapour phases and leaching by groundwater.
Publication Year: 1979
Publication Date: 1979-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 2
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