Ancient Megafloods Quiz

Who was the geologist that researched the strange features in Eastern Washington in the early 1900s?

• J Harlen Bretz

• John Davison Ng

• Joseph T. Pardee

• Georges Cuvier

What was the name of the giant lake in Western Montana that was dammed by a glacier?

• Lake Venice

• Lake Michigan

• Lake Missoula

• Lake Agassiz

What type of valleys were carved by the Ice Age floods in the Scablands of Washington?

• V-shaped valleys

• S-shaped valleys

• U-shaped valleys

• W-shaped valleys

What was the main piece of evidence that Joseph T. Pardee found in Western Montana regarding the ancient lake?

• Distinctive lines on hillsides

• Glacial ridges

• Varves

• Moraines

What was the name of the Ice Age lake that periodically ruptured causing massive floods?

• Lake Ontario

• Lake Superior

• Lake Missoula

• Lake Erie

What type of deposits interrupted the layers of varves in the remains of Lake Missoula?

• Sand

• Gravel

• Clay

• Silt

What was the name of the theory that explained all geologic formations as evidence of large, sudden, unpredictable events?

• Modern uniformitarianism

• Neo-catastrophism

• Catastrophism

• Uniformitarianism

What was the estimated span of time during which Glacial Lake Missoula flooded many times?

• 7,000 years

• 10,000 years

• 5,000 years

• 15,000 years

What was the estimated volume of water that broke free when the ice dam of Lake Missoula ruptured?

• 2,500 cubic kilometers

• 1,000 cubic kilometers

• 500 cubic kilometers

• 5,000 cubic kilometers

What did the remains of the bed of Lake Missoula reveal about the frequency of the catastrophic floods?

• Every 200 years

• Every 50 years

• Every 100 years

• Every 20-60 years