This lexicon describes 640 named stratified stratigraphic units considered in current use in Greenland at the end of 2018. The units are grouped chronologically into 17 sedimentary basins ranging in age from Palaeoproterozoic to Palaeogene. The few Neogene–Quaternary units and the units described from boreholes offshore West Greenland are grouped separately. Maps and associated simplified stratigraphic schemes provide overviews; and indexes of unit names and geographical names make entries to the lexicon easy.
Read more about "Stratigraphic lexicon for Greenland" on GEUS website.