Question: what are mammoth tusks used for in skyrim?
Answer: Uses. They are used in some miscellaneous quests, and can be used to make the spell tome of Conjure Storm Atronach in the Atronach Forge in the Midden in the College of Winterhold. Ysolda asks for one during the quest "Rare Gifts," and Madesi asks for one during the quest "Ringmaker."