What are the cataracts of the Nile?

The cataracts of the Nile are shallow and stretches between Aswan and Khartoum where the water's surface is broken by numerous small boulders and stones that lie on the river bed, as well as many small rocky islets. This is called "rapids or "white water". River cataracts often go with a rapid down-drop of the river.

Explanation:

texas governor sam houston opposed secession, but was unable to prevent it. in this speech, given prior to lincoln's election, he presents the argument that slavery would be safer within the united states than outside of it. it was a prescient argument, and one held by several other southern leaders.

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