{
"name":"Geology/GeoChron",
"title":"Geology/GeoChron",
"type":"Map Service",
"typeKeywords":["ArcGIS Server","Service","Map Service"],
"description":"From the USGS  Abstract: Radiometric ages of geological materials by K-Ar, Rb-Sr, Sm-Nd, fission track, and U-Th-Pb dating methods. A revision of DDS-14 correcting locations and providing the data in more convenient formats. Purpose: This database is a minor revision of DDS-14, with some corrections.",
"extent":[[-1.372347657896385E7,-1.2019201287050199E7],[4041729.563500815,5261048.471536598]],

"url":"https://gisweb.unr.edu/nbmg/rest/services/Geology/GeoChron/MapServer"
}