北海区（英语：Mare Boreum quadrangle）是美国地质调查局太空地质学研究计划（Astrogeology Research Program）对火星表面划分的30个区域之一，编号为MC-1。[1]其名称源于火星北极高原的旧名，这是一处被冰帽所覆盖的高原。[2]北海区的范围包括火星表面北纬65°以上的所有区域。
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