The"Boring Billion"refers the era between c.1.8 and 0.8 billion years ago(Ga)(Holland,2006;Young,2013).Especially,the period from 1.6 to 1.0 Ga is known as"the
1 Introduction Stratigraphy,placing the sequence of events in Earth history into order,is a fundamental part of the geosciences.Traditionally the starting point