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Porphyry (Geology Dictionary)

Porphyry: 1.  A rock that is porphyritic, containing large and small crystals.2.  In mining, a specific deposit containing widely disseminated metals, typically copper.

_ ស្វែងរកឬបកប្រែពាក្យផ្សេងទៀតនៅប្រអប់នេះ៖
ឯកសារការងារនិងរៀនគ្រប់ប្រភេទ៖​
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