a solid material forming part of the earth's surface, often made of one or more minerals
岩, 石
a solid, naturally occurring substance with a specific chemical composition, typically found in the earth's crust, such as gold, copper, etc.
鉱物
the central part of Earth, or any other planet
核, 中心部
the black or brownish substance consisted of organic remains, rock particles, and clay that forms the upper layer of earth where trees or other plants grow
土, 土壌
(geology) a horizontal bed or distinct sedimentary rock formation
層, 地層
a complete change in the form and structure of a rock as a result of heat and pressure
変成作用, 岩石の変成
the preserved remains or traces of ancient plants, animals, or other organisms found in rock
化石, 化石の残骸
a source of hot water that natrurally flows out of the ground
温泉, 熱水泉
a rock that contains valuable mineral or metal
鉱石, 鉱物
a grey powder that is produced as a result of a substance getting burned
灰, 燃焼後の灰色の粉
