| Glaciation - Lesson 19 - Part 4 of 7 Glaciation -- Understanding the Earth Host; Dr. David Pearson. Lesson 19 - Part 4 of 7 •Consequences; melting of the ice or advancing of the ice •Causes of ice ages •What do we know about climatic changes? Good historically •400ad 1200 AD mild weather voyages of the Vikings •1200 and 1400 cooling voyages more difficult for the Vikings •1400 and 1550 warming •1550 and 1850 'little ice age' •At one point in the little ice age Eskimos (Inuit) at one point could walk by foot over the glaciers to Scotland from the north. •Right now there is a 'cooling down' •We are in a ice retreat. •The last ice age formed about 2.5 million and retreat/advanced about 4 times •Frequency of ice ages •Elliott lake Ontario, Ice age deposits left in the pre Cambrian era •Glaciations in Permian, Palaeozoic no glaciation evidence has been found with our present glaciation of 200 million. •Theories of short term climate effects on the earth Tags: icebergs glaciation glaciology earth Consequences Causes of ice ages Vikings warming little age Eskimos Inuit Scotland cooling down retreat last Frequency Elliott lake Ontario Ice deposits Permian Palaeozoic no evidence Theories climate effects on the |