Lewisian  search
BTChronostratigraphic Units
 .Precambrian
 ..Proterozoic
 ...Lewisian
UFHebridean
SNEurope.
Lewisian Complex  search
BTChronostratigraphic Units
 .Precambrian
 ..Lewisian Complex
RTArchean
 Proterozoic
 Scotland
SNNW Scotland. Includes Loch Maree Group. Indexed with ages as applicable. Added to Thesaurus in 1989.