Ameasurement of ocean depths and seafloor topography is

Bathymetry.

Bathymetry is the measurement of ocean depths as well as other bodies of water as well as the charting of seafloor topography.

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explanation:

answer; (wisconsin);

explanation: the badger state. this nickname originally referred to the lead miners, of the 1830s, who worked at the galena lead mines in illinois. these mines were in northwestern illinois close to the borders of wisconsin and iowa. the wisconsin miners lived, not in houses, but in temporary caves cut into the hillsides.