This could melt the plagioclase and reset its age .
这就可能把斜长石融化和重新复位它的年龄。
But measuring the age of lunar plagioclase , samples of which were collected by apollo astronauts , is fraught with uncertainty .
然而测量由阿波罗宇航员采集的月球上斜长石样品的年龄,却充满了不确定性。
Evidence for an early lunar magma ocean comes from orbital data showing an abundance of plagioclase , a lightweight mineral that crystallises from and floats to the top of magma .
But clive neal of the university of notre dame in indiana says some of the plagioclase - including this sample - might simply have melted again after the moon formed .