Geologists have come to a consensus on the likely geological history of Lake Agassiz.

The river itself is very young; it began only after Lake Agassiz drained, about 9,500 years ago.

In the account he first hypothesized the existence of what is now known as Lake Agassiz.

There are two proposed scenarios for the final drawdown of Lake Agassiz, so which one, if either, is right?

The most famous of these proglacial lakes was Lake Agassiz.

It reached its largest volume around 8,500 years ago, when joined with Lake Agassiz.

Lake Agassiz filled until it overtopped the moraine about 11,700 years ago.

Other geological and geomorphological evidence for Lake Agassiz can also be seen today.

It is believed to have carried for a short time the outflow from the Lake Agassiz.

The inference is that he's taking it from Lake Agassiz, which dried up soon after the last ice age.