Paleoproterozoic

== English == === Etymology === From paleo- + Proterozoic. === Proper noun === Paleoproterozoic (geology) The era from 2,500 Ma to 1,600 Ma, marked by a dramatic increase in atmospheric oxygen. ==== Hypernyms ==== (era 2,500-1,600 Ma): Precambrian - eon/supereon, Proterozoic - eon ==== Hyponyms ==== (era 2,500-1,600 Ma): Siderian, Rhyacian, Orosirian, Statherian - systems/periods ==== Coordinate terms ==== (era 2,500-1,600 Ma): Mesoproterozoic, Neoproterozoic - eras ==== Translations ==== === Adjective === Paleoproterozoic (not comparable) (geology) Of a geologic era within the Proterozoic eon from 2,500 to 1,600 million years ago. ==== Translations ==== === See also === Appendix:Geologic timescale