Recent models have dismissed the role of mantle plumes in the formation of large igneous provinces, ascribing their origin instead to chemical anomalies in the shallow mantle. (sciencedaily.com)
Geological and chemical analysis of the region, known as the Franklin large igneous province, showed a sulfur - rich sediment through which the volcanic rocks erupted. (ibtimes.com)
Areas in violet outline large igneous provinces. (sciencedaily.com)