Glaciation

When did the last Ice Age end?

• 12,000 years ago

• 500 years ago

• 12 million years ago

• 5,000 years ago

What is a glacier?

• A Hollow high up in a mountain

• A steep sided ridge

• Masses of compressed and compacted ice.

• Rocks scratching and scraping the surface rock underneath

Name 2 processes of Glacial Erosion.

How can we tell what direction glaciers travelled?

• Striations

• Freeze-Thaw Action

• The location of Tarns

• Where there is a crevasse

Which is a landform of glacial erosion?

• Drumlin

• U-Shaped Valley

• Erratic

• Boulder Clay Plains

Where in Ireland can you see a fjord?

An Arete is a narrow, _ - sided ridge between two cirques.

What landform might you expect to find at a hanging valley?

• Ribbin Lake

• Fjord

• Waterfall

• Moraine

What is boulder clay?

• Material deposited in the valley floor

• Low,flat area of land made of sand and gravel in front of a terminal moraine

• Long, narrow ridge of sand and gravel

• Layer of boulders, sand, clay and stones

Explain how and Esker is formed. (Follow D-E-P-E-D)

Answer explanation

Eskers are features of glacial deposition. An esker is a long, narrow ridge of sand and gravel that winds its way along a lowland area. AN example of this is the Esker Riada in Co. Galway. As the glacier began to melt, streams of meltwater carrying a load of eroded material flowed underneath it. When this meltwater increased in volume a tunnel was carved out under the glacier. Eventually, some material was deposited on the bed if the meltwater stream. When the stream came out of the tunnel, it lost energy and began depositing the remainder of the load. This esker formed a ridge of sand and gravel on the surrounding plain. Roads have been built on eskers in many areas as they provide good foundations.