<p>This is a vintage hot metal car, used by railroads to haul molten iron at steel plants.
</p><p>The car is now part of the Lake Superior Railroad Museum collection in Duluth, Minnesota, USA.
</p>
The steel industry in Minnesota produced steel from iron metal derived from Proterozoic-aged banded iron formations that occur in several "iron ranges" in the state.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/47445767@N05">James St. John</a>
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/jsjgeology/21671865354/">Hot metal car (Lake Superior Railroad Museum, Duluth, Minnesota, USA) 1</a>