Understanding the Driftless Area

What is the term used for the material left behind by glaciers?

• Glacial sediment

• Glacial drift

• Glacial debris

• Glacial residue

Why is the Driftless Area considered a mystery?

• It is located in a desert.

• It has no glacial drift despite being surrounded by it.

• It is covered by glaciers.

• It has no geological features.

What geological features are prominent in the Driftless Area?

• Sandy beaches

• Flat plains

• Deep river valleys and rugged rock bluffs

• Volcanic craters

How did scientists initially investigate the Driftless Area mystery?

• By building a dam

• By studying maps and soil samples

• By conducting interviews

• By drilling for oil

What did scientists discover about the flow of glaciers?

• They flowed from south to north.

• They flowed in a straight line.

• They flowed in many lobes following ancient valleys.

• They did not move at all.

What technique did scientists use to determine the ages of the drift?

• Radiometric dating

• Thermoluminescence dating

• Geologic dating techniques

• Carbon dating

What did the discovery of different drift ages suggest?

• The drift was caused by volcanic activity.

• The drift was man-made.

• Multiple glaciers contributed to the drift over different periods.

• There was only one glacial period.

What rare discoveries were made in the Driftless Area?

• New species of birds

• Precious metals

• Rare species of plants and animals from before the ice age

• Ancient human artifacts

What type of fossils were found in the Driftless Area?

• Woolly mammoth and mastodon fossils

• Insect fossils

• Dinosaur bones

• Fish fossils

What is encouraged for those interested in the Driftless Area?

• To avoid the area

• To conduct online research and plan a visit

• To write a book about it

• To build a museum