Maraldi is a worn, eroded crater

Impact crater

In the broadest sense, the term impact crater can be applied to any depression, natural or manmade, resulting from the high velocity impact of a projectile with a larger body...

 on the western edge of the Sinus Amoris

Sinus Amoris

Sinus Amoris extends northward from the northeast end of the Mare Tranquillitatis. It is located at selenographic coordinates 18.1° N, 39.1° E, and lies within a diameter of 130 km. To the north of the bay are the jumbled Montes Taurus peaks.Near the southern end of the bay where it outlets...

, in the northeast part of the Moon

Moon

The Moon is Earth's only known natural satellite,There are a number of near-Earth asteroids including 3753 Cruithne that are co-orbital with Earth: their orbits bring them close to Earth for periods of time but then alter in the long term . These are quasi-satellites and not true moons. For more...

. To the west-southwest is the crater Vitruvius

Vitruvius (crater)

Vitruvius is a small lunar impact crater that lies on the northern edge of the Mare Tranquillitatis. To the east is the crater Gardner, and to the northeast is Fabbroni. To the north-northwest is the elongated Mons Vitruvius mountain, and beyond is the valley where the Apollo 17 mission landed.The...

, and to the northwest lies the worn Littrow

Littrow (crater)

Littrow is a lunar crater that is located in the northeastern part of the Moon's near side, on the east edge of Mare Serenitatis. Some distance to the northeast is the prominent crater Römer, while to the south is Vitruvius....

. Just to the northeast of the crater is the dome-like Mons Maraldi

Mons Maraldi

Mons Maraldi is a 1.3-kilometer-tall mountain on the Moon at 20.3° N, 35.3°E, covering an area about 15 kilometers in diameter. It is named after the nearby crater Maraldi....

 rise.

Maraldi has a very worn outer wall that is deeply incised and has the appearance of a circular range of peaks rather than a crater rim. The interior has been flooded with basalt

Basalt

Basalt is a common extrusive volcanic rock. It is usually grey to black and fine-grained due to rapid cooling of lava at the surface of a planet. It may be porphyritic containing larger crystals in a fine matrix, or vesicular, or frothy scoria. Unweathered basalt is black or grey...

ic lava

Lava

Lava refers both to molten rock expelled by a volcano during an eruption and the resulting rock after solidification and cooling. This molten rock is formed in the interior of some planets, including Earth, and some of their satellites. When first erupted from a volcanic vent, lava is a liquid at...

, leaving a flat surface with a low albedo

Albedo

Albedo , or reflection coefficient, is the diffuse reflectivity or reflecting power of a surface. It is defined as the ratio of reflected radiation from the surface to incident radiation upon it...

. There is a low ridge just to the northwest of the mid-point, and several tiny craters mark the floor surface.

Satellite craters

By convention these features are identified on lunar maps by placing the letter on the side of the crater mid-point that is closest to Maraldi.

Maraldi	Latitude	Longitude	Diameter
A	20.0° N	36.3° E	8 km
D	16.7° N	36.1° E	67 km
E	17.8° N	35.8° E	31 km
F	19.2° N	35.8° E	18 km
N	18.4° N	36.8° E	5 km
R	20.3° N	33.2° E	5 km
W	13.2° N	36.1° E	4 km

The following craters have been renamed by the IAU

International Astronomical Union

The International Astronomical Union IAU is a collection of professional astronomers, at the Ph.D. level and beyond, active in professional research and education in astronomy...

.

• Maraldi B — See Lucian (crater)
  Lucian (crater)
  Lucian is a tiny lunar impact crater that is located in the northeastern part of the Mare Tranquillitatis. The nearest named craters are Lyell to the east-southeast, Theophrastus to the northeast, and Gardner to the north-northeast. A little farther to the north is Maraldi crater...
  
  .
• Maraldi M — See Theophrastus (crater)
  Theophrastus (crater)
  Theophrastus is a small lunar impact crater at the southern part of the Sinus Amoris, a bay at the northeast part of the Mare Tranquillitatis. It lies to the southeast of the lava-flooded crater Maraldi, and was designated Maraldi M until the IAU gave it its current name...
  
  .