magnetic mountain
... that a world map by Gerardus Mercator attributes the Earth's magnetic field to a magnetic mountain above the Arctic Circle?
... that a world map by <a href="./Gerardus_Mercator" id="mwBE0" rel="mw:WikiLink" title="Gerardus Mercator">Gerardus Mercator</a> attributes the <a href="./Earth's_magnetic_field" id="mwBE4" rel="mw:WikiLink" title="Earth's magnetic field">Earth's magnetic field</a> to a <b id="mwBE8"><a href="./History_of_geomagnetism" id="mwBFA" rel="mw:WikiLink" title="History of geomagnetism">magnetic mountain</a></b> <i id="mwBFE">(pictured)</i> above the Arctic Circle?