The Fraser River in western Canada picks up chemical signatures from the environment through which it flows. Scientists can analyze samples from the river to track a geochemical journey that starts in the atmosphere, moves through rocks and plants, and sinks to the seafloor. (Illustration by Eric S. Taylor, © Woods Hole Oceanographic Institution)
SEARCH RELATED TOPICS: How the Ocean Works / Cycles / Carbon Cycle / Ocean Chemistry / Biogeochemistry
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