Continental crust has a significant influence on the processes occurring in the atmosphere.
Continental crust is called continental part of the crust, which consists of sedimentary and granitic rock. It was formed from young volcanic rocks rich in silica and minerals necessary for the emergence of living organisms. Currently, in the earth’s crust contains only a small proportion surviving from ancient times, minerals, which complicates the investigation of the formation of the geological layers of the planet. These include zircons, whose age may exceed four billion years.
Geologists analyzed the ratio of strontium isotopes in inclusions of Apatite to zircon-containing rocks in the North of Canada. This allowed us to determine the silica content of 4.2-4.4 billion years ago, which was enough to conclude the existence of continental crust at that time. This is contrary to the traditional view, according to which the crust was hot and dry for one and a half billion years after its formation.
Continental crust has a significant influence on the processes occurring in the atmosphere, the composition of sea water and nutrient availability, necessary for the development of life. Its presence also suggests that the bombardment of Earth by asteroids has not been intense, or they would impede its formation.
© 2018, z-news.link. All rights reserved.