Lubiniezky is a 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...

-flooded lunar

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...

 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 northwest edge of Mare Nubium

Mare Nubium

Mare Nubium is a lunar mare in the Nubium basin on the Moon's near side. The mare is located just to the southeast of Oceanus Procellarum. The actual basin is believed to be of Pre-Nectarian system, with the surrounding basin material being of the Lower Imbrian epoch. The mare material is of the...

. This feature is most readily located by finding the prominent crater Bullialdus

Bullialdus (crater)

Bullialdus is a lunar impact crater located in the western part of the Mare Nubium. To the north by north-west is the broken-rimmed and lava-flooded crater Lubiniezky. South-west of Bullialdus lies the smaller crater König....

 to the southeast.

The floor of Lubiniezky has been resurfaced by 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, which most likely entered from the surrounding mare

Lunar mare

The lunar maria are large, dark, basaltic plains on Earth's Moon, formed by ancient volcanic eruptions. They were dubbed maria, Latin for "seas", by early astronomers who mistook them for actual seas. They are less reflective than the "highlands" as a result of their iron-rich compositions, and...

 through the gap in the southeast wall. The surviving rim forms a curved, worn rise around the relatively flat and featureless inner floor. The rim is joined by ridges attached to the north and west walls. To the north of this feature is the bowl-shaped crater Darney

Darney (crater)

Darney is a small lunar crater that is located on the region of the Moon where the Mare Nubium joins the Oceanus Procellarum. To the south is the lava-flooded crater Lubiniezky. The southern rim of Darney is attached to a series of low ridges that extend to the southwest.This is a bowl-shaped...

. The associated craters Lubiniezky A and E are also flooded, and lie to the northwest.

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 Lubiniezky.

Lubiniezky	Latitude	Longitude	Diameter
A	16.4° S	25.6° W	30 km
D	16.5° S	23.4° W	8 km
E	16.6° S	27.3° W	37 km
F	18.3° S	21.8° W	8 km
G	15.3° S	20.2° W	4 km
H	17.0° S	21.2° W	4 km