SP Crater is a cinder cone, a conical structure made up of volcanic fragments, often glassy rocks containing bubbles of trapped gas.
火山灰锥，这种锥状结构通常由含有气泡的、透明光亮岩体组成。
SP Crater is a cinder cone, a conical structure made up of volcanic fragments, often glassy rocks containing bubbles of trapped gas.
火山灰锥，这种锥状结构通常由含有气泡的、透明光亮岩体组成。
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