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1 May 2011
Iceberg Drag Marks on the Bottom of Glacial Lake Agassiz
The linear streaks shown on the aerial photograph to the right are believed to have been gouged by icebergs dragging on the bottom of wind swept Glacial Lake Agassiz. The streaks (Lat. 48 50′ 45″ N; Lon. 97 16′ 30″ W) are up to several miles long, hundreds of feet wide and several feet deep. Glacial Lake Agassiz, named after the 19th Century naturalist Louis Agassiz, was the largest of …
John Freeland earned a PhD in Soil Science (Pedology) at North Dakota State University and is a consultant working in the private sector. He has published soils research and taught at the high school and college levels. John is interested in wetlands, soil genesis, science communication, the intersection of art and science, and soil-water-landscape processes. John lives near the Ohio-Michigan border and plays bass in multiple music projects.