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Among the most important and prolific sea creatures, diatoms are unicellular algae that exist singly but can join to form colonies. Characterized by a silica shell of often intricate and beautiful sculpturing, they are found in fresh and salt water, in moist soil, and on moist plant surfaces. As the principal constituent of plankton, diatoms are an important food source for many aquatic animals. The shells of dead aquatic diatoms form what sedimentary material used in the making of dynamite? Discuss
Source: The Free Dictionary