How did glaciers change the land in the northeast?
As the glaciers moved across the land, they wore down mountains, carved deep grooves into the coastline, and carried away most of the fertile soil. The melting glaciers formed many lakes. Lake Ontario and Lake Erie form part of the border of the Northeast region.
How have glaciers shaped our landscapes?
Glaciers can shape landscapes through erosion, or the removal of rock and sediment. They can erode bedrock by two different processes: Abrasion: The ice at the bottom of a glacier is not clean but usually has bits of rock, sediment, and debris. It is rough, like sandpaper.
What two features were created by glaciers?
Glaciers carve a set of distinctive, steep-walled, flat-bottomed valleys. U-shaped valleys, fjords, and hanging valleys are examples of the kinds of valleys glaciers can erode.
Why are glaciers disappearing?
Since 1980, climate change has led to glacier retreat becoming increasingly rapid and ubiquitous, so much so that some glaciers have disappeared altogether, and the existence of many of the remaining glaciers is threatened.
Why are glaciers dangerous?
Glaciers and their immediate environs present many dangers for humans, such as crevasses and glacier mills into which one might fall, heavily crevassed ice falls, snow and ice avalanches from the side walls and, along the flanks, dumping of great boulders, ponding and floods from melt water.
Is blue really a color?
Blue is the colour of light between violet and green on the visible spectrum. Darker shades of blue include ultramarine, cobalt blue, navy blue, and Prussian blue; while lighter tints include sky blue, azure, and Egyptian blue.
Why are glaciers blue for kids?
Glaciers can have a bluish tint. Over time, this makes the snow very dense and forces out any air bubbles. This change in the structure of the ice crystals causes the dense ice in the glacier to absorb red light and reflect blue light.
Where is the oldest ice on Earth?
Antarctica
How old is the oldest snow on earth?
How old is glacier ice?
- The age of the oldest glacier ice in Antarctica may approach 1,000,000 years old.
- The age of the oldest glacier ice in Greenland is more than 100,000 years old.
- The age of the oldest Alaskan glacier ice ever recovered (from a basin between Mt. Bona and Mt. Churchill) is about 30,000 years old.