The term "Canfield Ocean" refers to a prehistoric ocean that existed during the late Proterozoic era, specifically around 800 to 600 million years ago. It is named after the geologist Edward Canfield, who proposed the hypothesis based on studies of sedimentary rocks and geochemical evidence. The Canfield Ocean is significant because it represents a time in Earth's history when the ocean was characterized by low levels of oxygen, leading to unique anoxic conditions that affected biological and chemical processes.
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