The Last Glacial Maximum (LGM) refers to the time of maximum
extent of the ice sheets during the last glaciation (the Würm or
Wisconsin glaciation), approximately 20,000 years ago. An ice
sheet is a mass of Glacier Ice that covers surrounding terrain
and is greater than 50000 km² (20000 mile²) "Glacial" and
"Glaciation" redirect here For the geological periods see
Glacial period. "Last glacial" redirects here For the period of
maximum glacier extent during this time see Last Glacial Maximum
The last glacial period This extreme persisted for several
thousand years. At this time, ice sheets covered the whole of
Iceland and all but the southern extremity of the British Isles.
Iceland, officially the Republic of Iceland ( ( Ísland or
Lýðveldið Ísland ( The British Isles (Irish variously Na
hOileáin Bhriotanacha, Oileáin Iarthair Eorpa, Éire agus an
Bhreatain Mhór; Ellanyn Goaldagh Eileanan Northern Europe was
largely covered, the southern boundary passing through Germany
and Poland, but not quite joined to the Br