Onizuka (crater)
Encyclopedia
Onizuka is a small lunar
impact crater
that lies within the inner ring of the walled plain Apollo
. The central portion of Apollo has been covered by dark basalt
ic lava
, and Onizuka lies at the southern edge of this plain. To the southeast of Onizuka is the crater Borman
, and to the west-southwest is Chaffee
.
Onizuka is a circular, bowl-shaped crater with a sharp edge. The inner walls are simple slopes down to the interior floor, although piles of talus
lie at the base of some sections of the wall. There is a small central peak at the mid-point of the interior floor. A fine groove in the surface begins at the northern rim of Onizuka and leads away across the floor of Apollo to the east.
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...
impact 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...
that lies within the inner ring of the walled plain Apollo
Apollo (crater)
Apollo is an enormous impact crater located in the southern hemisphere on the far side of the Moon. This formation dwarfs the large crater Oppenheimer that is located next to the western rim. The crater Barringer lies across the northern wall...
. The central portion of Apollo has been covered by dark 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...
, and Onizuka lies at the southern edge of this plain. To the southeast of Onizuka is the crater Borman
Borman (crater)
Borman is a lunar impact crater that is located in the southern hemisphere on the far side of the Moon. It lies across the southeast section of the mountainous inner ring, within the walled basin named Apollo....
, and to the west-southwest is Chaffee
Chaffee (crater)
Chaffee is a lunar impact crater that is located in the southern hemisphere on the far side of the Moon. It lies within the huge walled plain Apollo, and is one of several craters in that formation named for astronauts and people associated with the Apollo program. This basin is a double-ringed...
.
Onizuka is a circular, bowl-shaped crater with a sharp edge. The inner walls are simple slopes down to the interior floor, although piles of talus
Scree
Scree, also called talus, is a term given to an accumulation of broken rock fragments at the base of crags, mountain cliffs, or valley shoulders. Landforms associated with these materials are sometimes called scree slopes or talus piles...
lie at the base of some sections of the wall. There is a small central peak at the mid-point of the interior floor. A fine groove in the surface begins at the northern rim of Onizuka and leads away across the floor of Apollo to the east.