![]() ![]() It is believed that this occurred sometime before 650 Mya (million years ago) during the Cryogenian period. The Snowball Earth hypothesis proposes that, during one or more of Earth's icehouse climates, the planet's surface became entirely or nearly entirely frozen. An earlier and longer possible snowball phase, the Huronian glaciation, is not shown. As for the Kaigas, its very existence is doubted by some. ĭating of pre- Gaskiers glaciations is uncertain.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |