Lacus Mortis

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Lacus Mortis, latin for "Lake of Death", is a plain of basaltic-lava flows in the northeastern part of the Moon. It lies just to the south of the elongated Mare Frigoris, being separated by a slender arm of rugged ground. To the south is the Lacus Somniorum, separated from this mare by the joined Plana-Mason crater pair, and a strip of uneven surface.

Located prominently just to the east of the mid-point of this feature is the Bürg crater. The western part of the Lacus Mortis contains an extensive system of criss-crossing rilles collectively designated Rimae Bürg.

The selenographic coordinates of the Lacus Mortis are 45.0° N, 27.2° E, and it has a diameter of 151 km.

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