It was made of black, glassy lava mixed with bits of feldspar.

它成分为黑色和坡璃质火山石，同时大杂了长石碎片。

Very likely, Professor Aronnax, because since 1866 eight little lava islets have surged up in front of the port of St. Nicolas on Palea Kameni.

那很可能，阿龙纳斯先生，因为，自18 66年以来，有火山石巴列亚～加孟宜圣尼古拉港对面浮出来了。

Richard identified both as obsidian. " These are volcanic rock, " he said in his best encyclopedic voice. " But this isn't" . He kicked a washed-out stone and waved at the formation. " This is sediment" . Richard had a talent for scientific trivia.

理查德认出这两块石头都是黑曜石。" 这些是火山石，" 他用他那百科全书式无所不知声音说，" 但这块不是，" 他用脚踢了踢一块褪色石头，挥手指着那块岩层说：" 这是沉积物。" 理查德有研究科学冷知识天赋。

This soft volcanic stone called tufa.

这种被称为图фа柔软火山石。