A dark, low-lying lunar plain, filled to some depth with volcanic rocks.
Latin for "sea," it is an area of basalt rock on the surface of the Moon created relatively recently by oozing lava. The plural form of mare is maria. It is thought that most maria formed as a result of impacts on the Moon; lava bled from cracks made in the Moon's surface and filled craters to form the dark "seas" visible from Earth. Maria are the youngest and most crater-free regions on the Moon's surface.
The broad darker areas on the Moon's surface, which consist of flood basalts that erupted over 3 billion years ago and spread out across the Moon's lowlands.
The dark areas of the Moon, which consist of basalt lava flows erupted into depressions (typically old large impact craters called "basins") a few tens to hundreds of millions of years after the impact event.
One of the smooth areas on the moon or on some of the other planets.
Dark marking on the Moon, Mercury, or Mars. (Latin name for sea; plural, maria).
The low albedo plains covering the floors of several large basins and spreading over adjacent areas. The mare material is comprised primarily of basaltic lava flows, in contrast to the anorthosites in the highlands.
A large dark flat area on the lunar surface (Lunar Sea). May be seen with the unaided eye.
Lava flows on the surface of the moon. Plural, maria.
Any of the relatively smooth, low, dark areas of the Moon. The lunar maria were formed by extrusion of lava.
Relatively dark-colored and smooth region on the surface of the Moon.
Low lying, level, relatively smooth, plains like areas of considerable extent.
Relatively dark-colored, smooth areas on the lunar surface, representing ancient lava flows which filled in and depressed still more ancient craters of relatively large size. The mare lavas are denser than the lighter colored rocks which they overlie, and which surround them, and as a result, they depress the floors of the craters which they 'fill' even further than they would be depressed if they were not covered by the lava.
a dark region of considerable extent on the surface of the moon
A dark area on the Moon. Most maria are impact basins filled with solidified molten rock.
(pl. maria). The maria are the dark regions of the moon, once thought to be seas, hence the term mare from the Latin for sea. The term is also applied to dark regions on Mars.
a dark and relatively smooth area on the surface of the moon or a planet.
Latin for "sea"; name applied to the dark, relatively smooth features that cover 17 percent of the Moon.
One of the lunar lowlands filled by successive flows of dark lava.
Latin word for "sea." Galileo thought the dark featureless areas on the Moon were bodies of water, even though the Moon is essentially devoid of liquid water. The term is still applied to the basalt-filled impact basins common on the face of the Moon visible from Earth.
Area of dark basaltic lava on the Moon (pl. Maria).