The Ice Ages

The Ice Ages occurred during the Cenozoic era, which began approximately 66 million years ago and continues to the present day.

An interglacial period is a period of time between two glacial periods when the Earth's climate is warmer and the ice sheets retreat.

A piedmont glacier is not a type of glacier. It is a term used to describe a glacier that flows from a mountain range onto a plain or valley.

The Pleistocene is the most recent glacial period, which began approximately 2.6 million years ago and ended about 11,700 years ago.

Desertification is not a consequence of the Ice Ages. It is a process that occurs when a region becomes increasingly dry and barren, often due to human activities.

Glacial erosion is the process by which glaciers erode and transport sediment. This can occur through a variety of mechanisms, including abrasion, plucking, and quarrying.

A drumlin is not a type of glacial deposit. It is a hill or ridge of glacial till that is elongated in the direction of the ice flow.

A till plain is a large, flat area of land that was once covered by a glacier. It is composed of glacial till, which is a mixture of sediment that was deposited by the glacier.

A hanging valley is not a type of glacial landform. It is a valley that is located high above the main valley and is separated from it by a steep cliff.

An interglacial period is a period of time when the Earth's climate is relatively warm and stable. This is in contrast to a glacial period, when the climate is colder and ice sheets cover large areas of the Earth's surface.

Continental drift is not a factor that influenced the onset of the Ice Ages. Continental drift is the movement of the Earth's continents over time.

Glacial deposition is the process by which glaciers deposit sediment. This can occur through a variety of mechanisms, including melting, sublimation, and calving.

Loess is not a type of glacial till. It is a type of wind-blown sediment that is composed of fine-grained particles.

An outwash plain is a large, flat area of land that was once covered by an ice sheet. It is composed of sediment that was deposited by meltwater from the glacier.

An esker is not a type of glacial landform. It is a long, narrow ridge of sediment that was deposited by a meltwater stream flowing beneath a glacier.