Mons Gruithuisen Delta is a mountain of the surface of the Moon. It is located north of Gruithuisen crater, east of Mons Gruithuisen Gamma. It has an altitude of about 1800 meters and a diameter of about 27 kilometers.LROC Quickmap, DEM contours layer The name, given in 1935, was named after Franz von Paula Gruithuisen, a German astronomer.

The mountain has an extremely low bulk density of 2150 kg/m3.The Bulk Density of the Small Lunar Volcanos Gruithuisen Delta and Hansteen Alpha: Implications for Volcano Composition and Petrogenesis

See also Volcanism on the Moon

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