Dolerite : 1. A basic igneous rock of medium grain size, occurring as minor intrusions or in the central parts of thick lava flows.2. A dark-coloured, basic, igneous rock, composed essentially of pyroxene and a triclinic feldspar with magnetic iron. Considered by some authors to be equivalent to a coarse-grained basalt.3. A dark, crystalline, igneous rock, chiefly pyroxene with labradorite.4. Coarse-grained basalt.5. Diabase.6. Any dark igneous rock composed chiefly of silicates of iron and magnesium with some feldspar.
👇 ស្វែងរកឯកសាររៀននិងការងារគ្រប់ប្រភេទនៅទីនេះ៖
👇 ស្វែងរកពាក្យផ្សេងទៀតនៅប្រអប់នេះ៖