Riggs, PeterAnn McGrathMary Anne Jebb2018-11-302018-11-30978-1-925022520http://hdl.handle.net/1885/154040The term 'deep time' denotes vast, extremely remote periods of (natural or other) history - distant and extensive spans of time that are almost beyond the grasp of the human mind. In western science, deep time is used to refer to eras dating back to the forma of the Earth (4.5 billion years ago) as indicated by empirical evidence, for example, the geological record.20 pagesapplication/pdfen-AUAuthor/s retain copyright201510.22459/LHDT.05.2015.032021-08-01