Latest Pleistocene and Holocene behaviour of Franklin Glacier, Mt. Waddington area, British Columbia Coast Mountains, Canada

Franklin Glacier is an 18-km-long valley glacier that originates in a broad icefield below the west face of Mt. Waddington in the central British Columbia Coast Mountains, Canada. Radiocarbon-dated wood samples from the proximal faces of lateral moraines flanking Franklin Glacier show that the glacier expanded at least nine times since 13,000 cal. yr BP. A probable Younger Dryas advance of Franklin Glacier at 12,910–12,690 cal. yr BP followed the late glacial retreat and down wasting of the Cordilleran Ice Sheet from ca. 16,000 to 12,900 cal. yr BP. During the succeeding early Holocene warm period, Franklin Glacier appears to have retreated significantly, leaving no record of glacial expansion until the mid-Holocene when it repeatedly advanced at 6360–6280, 5470–5280 and 4770–4580 cal. yr BP. Down wasting of the glacier surface after ca. 4770–4580 cal. yr BP was followed by intervals of expansion at 4260–4080, 3210–3020 and 2620–2380 cal. yr BP. Following ice expansion at ca. 2620–2380 cal. yr BP into trees over 224 years in age, there is no record of the glacier activity until 1570–1480 cal. yr BP when Franklin Glacier thickened and advanced into young subalpine fir trees. During the ‘Little Ice Age’, advances at 800–680, 610–560 and 570–510 cal. yr BP preceded a mid-19th to early 20th century advance that saw Franklin Glacier attain its maximum Holocene extent. The dendroglaciological record at Franklin Glacier is among the most comprehensive recovered from the British Columbia Coast Mountains and showcases the complexity of mid- to late Holocene glacier expansion in the region

Cryosphere · Geography · Glacial period · Glacier · Glacier mass balance · Glacier morphology · Holocene · Ice calving · Ice field · Ice stream · Moraine · Physical geography · Radiocarbon dating · Sea ice · Tidewater glacier cycle · Younger Dryas · Cryospheric studies and observations · Geology and Paleoclimatology Research · Landslides and related hazards · Geology · Oceanography · Paleontology

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