{"thcode":2,"term":{"code":1655,"name":"Precambrian","parent":1634,"scope":"General interval of geologic time before approximately 542 million years ago. https:\/\/doi.org\/10.3133\/fs20103059"},"uf":[{"name":"cryptozoic","usewith":false}],"bt":[{"code":1634,"name":"geologic time periods","parent":1663,"scope":null},{"code":1663,"name":"time periods","parent":1,"scope":"Geologic time periods and seasons of the year"},{"code":1,"name":"Categories","parent":null,"scope":"Thematic terms for categorizing information resources.  This thesaurus is intended to support finding and understanding scientific information."}],"nt":[{"code":1622,"name":"Archaean","parent":1655,"scope":"Eon of geologic time approximately 4 to 2.5 billion years ago. https:\/\/doi.org\/10.3133\/fs20103059"},{"code":1635,"name":"Hadean","parent":1655,"scope":"Eon of geologic time prior to 4 billion years ago. https:\/\/doi.org\/10.3133\/fs20103059"},{"code":1656,"name":"Proterozoic","parent":1655,"scope":"Eon of geologic time approximately 2.5 billion to 542 million years ago. https:\/\/doi.org\/10.3133\/fs20103059"}],"rt":[]}