What are the similarities and differences between glaciers and continental glaciers?
Continental glaciers cover parts of continental land masses like Greenland but, Alpine glaciers are found high in mountain valleys, above the snow-line. Differences: Location; Alpine glaciers are only found on mountain tops but continental glaciers are only found at the earth’s poles regardless of elevation.
How are glaciers and icebergs similar?
Glaciers are large sheets of ice that can extend for miles. Glaciers are located in the Arctic and Antarctica, with the largest glaciers appearing in Antarctica. Icebergs, on the other hand, are smaller pieces of ice that have broken off (or calved) from glaciers and now drift with the ocean currents.
How are glacial drift and till alike and different?
How are they different? Glacial drift and till are sediment deposited by glaciers. Drift is sorted sediment deposited by meltwater. Till is unsorted debris that is deposited directly from the ice.
What is the main difference between firn and glacial ice?
Firn is usually defined as snow that is at least one year old and has therefore survived one melt season, without being transformed to glacier ice….Firn.
| New snow (immediately after falling, calm conditions | 50-70 |
|---|---|
| Firn | 400-830 |
| Very wet snow and firn | 700-800 |
| Glacier ice | 830-923 |
What is the largest crevasses in the world?
highest spot on Earth, approximately 8,850 meters (29,035 feet). Mount Everest is part of the Himalaya and straddles the border of Nepal and China.
What to do if you fall in a crevasse?
If you fall in a crevasse you can use the ice screw to secure yourself so you don’t fall deeper. The pulley and carabiners are for rescuing others. Two ice tools, crampons, rope, and several ice screws (basically, ice climbing gear) may allow you to climb out yourself.
How deep can a crevasse go?
148 feet
What is the difference between crevasse and crevice?
It’s the difference between geology and glaciology. While both terms come from the Anglo-French word crevace, to break, they mean two different things. Crevices are cracks or splits caused by a fracture of a rock, while a crevasse is a deep fracture in a glacier or ice sheet.
Whats at the bottom of a crevasse?
A crevasse is a crack in the surface of a glacier caused by extensive stress within the ice. By descending into a crevasse, scientists can observe the layers of snow from past years or, deeper down, the ice crystals of the glacier. Crevasses can be small, but many are quite large.
What is the best source of data showing Ice Age climate cycles?
The most complete source of data showing Ice Age cycles were sediment cores from the deep ocean floor. These provided an uninterrupted record of climatic cycles for the Ice Age.
Which is the strongest evidence for climate change?
Scientists say the accumulation of heat in the oceans is the strongest evidence of how fast Earth is warming due to heat-trapping gases released by the burning of fossil fuels.
Is ice age considered climate change?
Conclusions. Although climate scientists have worked hard to determine the ultimate trigger of abrupt climate change during the last ice age, it is likely that a combination of ocean and atmospheric circulation changes were involved.