Word: gunflint
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...Walter Mondale was finally relaxing. Back in the north woods of his native Minnesota for a glorious week, he had no swarm of reporters around him constantly nagging, plenty of home-cooked meals (steaks, barbecued chicken, fresh fish), and time with the whole family in a rustic cabin on Gunflint Lake...
...Most rocks that date from those early years have been deeply buried for so long and subjected to so much heat and pressure that all organic traces they once contained have been turned to shapeless specks of carbon. One notable exception is a hard, black, ancient rock found near Gunflint Lake in western Ontario, which somehow escaped this rough treatment. In the magazine Science, Paleontologist Elso S. Barg-hoorn-of Harvard and the late Geologist Stanley A. Tyler of the University of Wisconsin describe the remains of microscopic organisms that lived in that "Gunflint chert" - an impure silica -about...
...living parts were on the tips: microscopic threads of algae tangled together, busily depositing silica that stiffened the columns. The hummocks eventually became the Gunflint chert, which radioactive dating proves to be 2 billion years...
...plant fossils were taken from a deposit of flint rock in the gunflint formation near Schreiber. Out The two researchers identified their find as "the oldest structurally preserved organisms which have been discovered in pre-Cambrian sediments." They are "of great theoretical interest in the evolutionary scheme of primitive life...
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