About: http://webisa.webdatacommons.org/38542239

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The boundaries are marked in the fossil record by explosive diversification of many new forms of life and mass extinctions. ??? ??? ??? radiometric dating The most common method to determine the ages of fossils in years.
http://www.w3.org/ns/prov#wasQuotedFrom	quizlet.com