initial oceanic crust的用法和樣例：
例句
- The sinking of oceanic crust at subduction zones carries water and carbon dioxide back into the mantle.
在俯衝區洋殼下沉，又把水和二氧化碳帶回地下。 - The Ophiolite massifs are composed of mantle peridotite that is mainly harzburgite and dunite, and lacked of crust magmatite within the typical Ophiolite suite.
摘要該蛇綠岩帶的岩體由地幔橄欖岩組成，主要岩石類型是方輝橄欖岩和純橄欖岩，缺少典型蛇綠岩剖面中的洋殼單元。
