• Mississippi National River and Recreation Area


    National River & Recreation Area Minnesota

Inside of a Mussel Shell

The inside of a mussel shell.
The inside of a pocketbook mussel shell (Lampsilis cardium).

Did You Know?

Headwaters of the Mississippi

The Mississippi River is approximately three feet deep at its headwaters at Lake Itasca and has an average surface speed of 1.2 miles per hour.