{"thcode":2,"term":{"code":1631,"name":"Eocene","parent":1648,"scope":"Epoch of geologic time approximately 56 to 34 million years ago. https:\/\/doi.org\/10.3133\/fs20103059"},"uf":[],"bt":[{"code":1648,"name":"Paleogene","parent":1662,"scope":"Subperiod of geologic time approximately 65 to 23 million years ago. https:\/\/doi.org\/10.3133\/fs20103059"},{"code":1662,"name":"Tertiary","parent":1627,"scope":"Period of geologic time approximately 65 to 1.8 million years ago. In new studies, this term is deprecated in favor of Neogene and Paleogene. https:\/\/doi.org\/10.3133\/fs20103059"},{"code":1627,"name":"Cenozoic","parent":1652,"scope":"Era of geologic time approximately 65 million years ago extending to the present. https:\/\/doi.org\/10.3133\/fs20103059"},{"code":1652,"name":"Phanerozoic","parent":1634,"scope":"Eon of geologic time approximately 542 million years ago extending to the present. https:\/\/doi.org\/10.3133\/fs20103059"},{"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":[],"rt":[]}