Boring Billion

== English == === Etymology === From boring +‎ billion. From the remarkably stable environment of the time, over a period of 1 billion years, from climate, weather, geology, tectonic shifting, lifeforms. === Proper noun === the Boring Billion (geology) The period of time from 1.8 Gya to 800 Mya, on Earth, lying in the middle of the Proterozoic. ==== Synonyms ====