Merton Yarwood Williams

1883 – 1974

• An eurypterid horizon in the Niagara formation of Ontario
• An euryterid horizon in the Niagara formation of Ontaria
• Arisaig-Antigonish district, Nova Scotia
• Geology of southern Alberta and southwestern Saskatchewan
• The Ordovician rocks of Lake Timiskaming
• The Silurian geology and faunas of Ontario peninsula, and Manitoulin and adjacent islands