The Snowy Day, a 1963 Caldecott Medal winner, is the simple tale of a boy waking up to discover that snow has fallen during the night. Keats's illustrations, using cut-outs, watercolors, and collage, are strikingly beautiful in their understated color and composition.
There are three iron ranges in the Upper Peninsula of Michigan, these are the Gogebic, Marquette and Menominee Ranges. The Gogebic was the last of the three great iron ore fields opened in the Upper Peninsula and northern Wisconsin.
Specimens of limonite and hematite may also be found in this area. Iron ore was also mined in northeastern Kentucky in Greenup, Boyd, and Carter Counties, where iron ore occurs in the Upper Mississippian and Lower Pennsylvanian rocks. Siderite and limonite nodules also occur at this locality.