The Cordilleran Ice SheetJohn J. Clague,

Simon Fraser UniversityBurnaby, BC Canada

Clague and Turner 2003

Austin Post

Clague and Turner 2003

Maximum ice sheetMIS 2

The glacial footprint in British Columbia

Ice sheet growth

27 ka (14C)30 ka (14C)

20 ka (14C) 15 ka (14C)

15 ka (14C)

15 ka (14C)

Ice sheet

Decay and death

Stuiver et al.

Dyke and Prest

Retreat at the west margin

Clague and Turner 2003

Clague and Turner 2003

Retreat near the centre

FultonMargold et al. 2013

How many ice sheets were there?

How many of these?

NRCan

Glacio-volcanism provides a clue

A Post

JJ Clague

Edwards et al.