1) Impact crater on Mars 
==Economy== The chief industries in Nipigon are forest products, fishing, and tourism. Nipigon is a setting off point for fishing excursions onto Lake Superior and the Nipigon River system leading up to Lake Nipigon. Fish varieties common to this area include Atlantic salmon, lake trout, speckled trout (the world`s largest speckled trout was caug....
Nipigon is a cultivated variety of potato.
a lake in SW Ontario, in S central Canada. ab. 1870 sq. mi. (4845 sq. km).