Tesaurus d'Art i Arquitectura Getty Institute 0000-00-00 2024-01-24 15:40:44 en Archean300391475ArchaeanArchean Eon On the geologic time scale, the period preceding the Proterozoic Eon, spanning about 1.5 billion years, in which the Earth's atmosphere was probably of methane, ammonia, and other gases, and the surface cooled enough that rocks and continental plates began to form. Archean (traducció pendent) arqueà 2026-03-30 20:24:13