کلمه shale یافت شد:
n: a fine-grained sedimentary rock: composed mostly of consolidated clay or mud. Shale is the most frequently occur- ring sedimentary rock:.
n: a finely-grained sedimentary rock composed of silt- and clay- sized particles.
a common sedimentary rock with porosity but little matrix permeability. Shales are one of the petroleum source rocks. Shales usually consist of particles finer than sand grade (less than 0.0625 mm) and include both silt and clay grade material.
سنگ رسی
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