A paper published in the journal "Geochemical Perspectives Letters" reveals that magmatic rocks from inactive volcanoes contain significantly higher amounts of REE than rocks from active volcanoes.

The work published in the journal "Geochemical Perspectives Letters" indicates that magmatic rocks from the interiors of inactive volcanoes contain significantly higher amounts of REE than rocks ...

This currently inactive volcanic area ... Click image for a larger view. Subduction zone volcanoes commonly exhibit a symmetric shape with steeper slopes near the vent and a broad gentle base.

Several international flights from Indonesia’s resort island Bali were cancelled after Mount Lewotobi Laki-Laki volcano ...