Quarries and stone quarries for the extraction of clay, limestone, stone, sand, gravel, aggregate, and broken granite, which are used as raw materials for ceramics, civil engineering, and building materials. These are mainly open-air. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
窯業原料,土木,建築用材料などにする粘土,石灰石,石材,砂,砂利,骨材用砕石,割栗石などの採掘場や石切場など。主として露天である。
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