| Class: | 5C |
| Name: | Audrey Davison |
| Year: | 2017 – 2018 |
| 地質年代：元古代化學組成, 鍵及結構：主要為斜長石長石（90-100％），具有最低鎂鐵質組分（0-10％）。輝石，鈦鐵礦，磁鐵礦和橄欖石是最常見的鎂鐵礦物。 | Geological Age: Proterozoic Eon
Chemical composition, bonding and structure: Mostly plagioclase feldspar (90–100%), with a minimal mafic component (0–10%). Pyroxene, ilmenite, magnetite, and olivine are the mafic minerals most commonly present. |
| 形成：岩漿在地殼岩漿房中融化形成低密度斜長石和殘餘液體，其密度大於封閉地殼岩石的密度。然後它凝固成密集的富鐵堆積物並被移除到地幔。原生物：元古代斜長岩 | Formation: Magma melts in crustal magma chambers to form low-density plagioclase and a residual liquid whose density was greater than that of enclosing crustal rocks. Then it solidifies as dense Fe-rich cumulates and being removed to the mantle.
Living Specimens: Proterozoic anorthosite |
| 特性：
粗粒 •不規則骨折 •多孔 •珠光至碧水 |
Properties:
|
| 用途：
· 鋁 · 調查火星，金星和隕石 |
Application:
|