According to researchers, the rocks could remain after the collapse of the continent Gondwana.
Geologists have discovered on the tropical island of Anjouan “impossible” minerals. As reported by the online edition of the Chronicle.info with reference to zn.ua the island is of volcanic origin, and should consist mainly of basalt. However, for a long time, researchers continue to find it and other breeds, which, according to scientists, can be explained by the inclusion in its composition of a part of the supercontinent Gondwana.
Mention about the discovery on the island of the elements of quartzite Dating from the 1900s. Scientists conducted an expedition to the island in 2018. As a result, they were able to confirm the availability of on Anjouan elements of quartzite, which may not form on volcanic Islands. Moreover, the researchers found the parent rock that contains large amounts of this substance, which is contrary to the ideas about plate tectonics.
According to researchers, the presence of quartzite may be due to the inclusion of Anjouan part of the supercontinent of Gondwana, which broke up about 150 million years ago. A piece of continental rocks could break away from Africa or Madagascar, staying in an ocean basin between them. About four million years ago when a volcanic eruption led to the emergence of the island the quartzite has been included in basaltic rocks.