Ancient English eruption sparks debate over 'supervolcano' label
Geologists traced a 454-million-year-old eruption beneath England’s east coast to the Ordovician period, linking it to the Kinnekulle tephra ash that spread as far as Scandinavia. The event was colossal and likely produced long-lasting ash clouds and pyroclastic flows, but many scientists caution that the term “supervolcano” is vague; instead, they describe eruptions by volume (ultraplinian) and note evidence is insufficient to label this as a true supervolcano.
