Sentences with phrase «episodes of volcanic material»

Multiple episodes of volcanic material bubbling up from below may be needed to explain the features.

Not exact matches

In particular, eruptions such the Timanfaya's in Lanzarote ─ one of the strongest in the country due its duration until 1736 and the amount of thrown material ─ and Tambora's ─ one of the biggest volcanic episodes, which led to a «year without summer» in 1816 ─ released big amounts of iron that altered the chemical composition of the annual Pyrenean tree rings.