noun
striation; ray system
Technical term in geology and astronomy. In geology, refers to linear grooves or scratches on rock surfaces caused by glacial movement or faulting. In astronomy, refers to the radial streaks of ejecta surrounding impact craters on the Moon and other planetary bodies.
月面のクレーターからは、光条が放射状に伸びている。
Ray systems extend radially from craters on the lunar surface.
この岩石の表面には、氷河によってできた光条が観察される。
Striations formed by glacial movement can be observed on the surface of this rock.