A man in a red shirt standing near Ralph Lake after the 1967 fire. Clay soil general view. Soil #4.

A cross section of soil at Ralph Lake after the 1967 fire. Dump till. Soil #3.

A cross section of soil at Ralph Lake. Note disturbance - Windthrow(?). Soil #2

A general view of a dump till of stony sand at Ralph Lake after the 1967 fire and a black backpack in the bottom right corner. Soil #2.

Man in yellow standing behind a dirt pile at Ralph Lake after 1967 fire surrounded by trees. Soil #2,3,4.

General views of Ralph Lake near Sioux Lookout after it was burnt in June 1967.

A pencil in front of a cross section of soil. A close-up of ground near Sioux Lookout that was burnt in 1967. Soil #1.

A pencil in front of a cross section of soil. A closer view of ground near Sioux Lookout that was burnt in 1967. Soil #1.

A pencil in front of a cross section of soil. A general view of ground near Sioux Lookout that was burnt in 1967. Soil #1.

Radar dome, Sioux Lookout - June 1967 fire.