Exam 17: Glaciers and Glaciation

Drumlin fields contain ________.

All unconsolidated glacial sediments irrespective of grain size, sorting, or depositional process are referred to as till.

Would most features of alpine glaciation be preserved in the geologic record? Why or why not? What about continental glaciation?

Rock flour consists of silt-sized rock and mineral particles produced by glacial abrasion.

Briefly describe how glaciers and ice ages relate to two global cycles.

Sand and gravel deposited by glacial meltwater streams are known as outwash till or stratified till.

Lake Winnipeg in Manitoba is the shrunken remnant of glacial Lake Agassiz which used to be the largest Pleistocene lake in North America.

An ice carved, asymmetrical bedrock knob with the steep side downhill is called a ________.

Headward erosion by alpine glaciers on two sides of a mountain ridge can remove enough rock to intersect forming a pass called a ________.

Valleys deeply eroded by alpine glaciers have what characteristic, cross-valley profile?

What term describes open fissures in the brittle, surface ice of a glacier?

Which one of the following statements concerning glacial deposits is false?

The focal point of a valley glacier's growth is a bowl shaped depression called a ________.

Match the features on the illustration below to the correct answer for each one. A.kame B.outwash plain C.esker D.end moraine E.drumlin F.kettle

Which of the following is the correct listing of the classical North American glacial stages from oldest to youngest?

The ________ is not the name of a Pleistocene glacial episode in North America.

Eskers and kames are associated with meltwater streams; they are composed of stratified sand and gravel.

The big quartzite rock sitting on the prairie at Okotoks, Alberta, and similar, smaller blocks strung out over 600 kilometres from their eroded bedrock source near Mt.Edith Cavell in Jasper National Park, make up ________.

Compared to earlier or subsequent streams in the same valleys, alpine glaciers move ________ but carry ________ sediment.

What are two problems with Paul Hoffman's "Snowball Earth Hypothesis"?