helium age मीनिंग इन हिंदी

One lava flow, from Little Springs, south of Pliocene Mount Trumbull, has a cosmogenic helium age of 1300 + /-500 years BP . Pottery shards dated to between A . D . 1050 and 1200 were found within the lava flow, produced around the same time as the Sunset Crater eruption in the San Francisco volcanic field on the South Rim.