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Niagara Falls: Spectacular Waterfall on the Border

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Niagara Falls: Spectacular Waterfall on the Border

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Questions and Answers

What is the height of the American Falls at Niagara Falls?

150 feet

225 feet

200 feet (correct)

175 feet

Which geological period do the rock strata in the Niagara gorge belong to?

Cretaceous Period

Jurassic Period

Devonian Period

Silurian Period (correct)

What is the length of the curving crest line of the Horseshoe Falls at Niagara Falls?

2,500 feet

2,200 feet (correct)

1,500 feet

2,000 feet

What type of rock forms the upper layer in the Niagara gorge at Niagara Falls?

Dolomite Signup and view all the answers

How much does the rock strata in the Niagara gorge dip southward per mile?

20 feet per mile Signup and view all the answers

What is the primary factor contributing to the erosion of the Niagara Falls?

The presence of shale beneath the dolomite layer Signup and view all the answers

How does the disposition of the rock strata aid in maintaining the vertical nature of the Niagara Falls?

It creates an overhanging ledge from which water falls vertically Signup and view all the answers

What is the primary reason for the diversion of water above the Niagara Falls?

To provide water for hydroelectric power generation Signup and view all the answers

What safety measures were implemented at the American Falls in 1969?

Safety measures for the viewing public were implemented Signup and view all the answers

What is the estimated average rate of recession (upstream movement) of the Horseshoe Falls between 1842 and 1905?

5.5 feet per year Signup and view all the answers