Anjouan's Volcanic Island Has "Impossible" Rocks - Tech Gadget Central
A volcanic island in the southwestern Indian Ocean, Anjouan, has a strange geological mystery. Residents and geologists on the island keep finding an unusual rock. The island is made of basalt, which formed when tectonic plates shifted away and magma rose and cooled in an ocean basin. Quartzite, a sedimentary rock made from quartz sand …
Source: techgadgetcentral.com
