_:genid1 . _:genid1 "RRRAG4" . _:genid2 . _:genid2 . _:genid2 "81.51"^^ . _:genid2 "58.91"^^ . _:genid2 "6.62"^^ . _:genid2 "-88.33"^^ . _:genid3 . _:genid3 . _:genid3 "1993-06-23T00:00:00"^^ . _:genid3 "2013-04-26T00:00:00"^^ . "nasa-nsidcdaac-rrrag4" . "Radiostratigraphy and Age Structure of the Greenland Ice Sheet"^^ . "10.5067/UGI2BGTC4QJA" . _:genid1 . . "This data set contains the traced deep radiostratigraphy of the Greenland Ice Sheet from airborne deep ice-penetrating radar data collected by The University of Kansas Improved Coherent Radar Depth Sounder (ICORDS), Advanced Coherent Radar Depth Sounder (ACORDS), Multi-Channel Radar Depth Sounder (MCRDS), and Multichannel Coherent Radar Depth Sounder (MCoRDS) instruments between 1993 and 2013. This is an IceBridge-related data set."^^ . "2015-08-12T00:00:00"^^ . _:genid2 . _:genid3 . . _:genid4 . _:genid4 . _:genid4 . _:genid4 . "oai:nsidc/RRRAG4" . "http://nsidc.org/api/dataset/2/oai?verb=GetRecord&metadataPrefix=dif&identifier=oai:nsidc/RRRAG4" . .