n.钙长石(一种粒状火成岩),斜长岩
Seams in the anorthosite series are only intermittently exposed.
斜长岩组中的矿层仅断续出露.
The anorthosite complex in Damiao, Hebei Province is the only one massif - type anorthosite in China.
河北大庙斜长岩杂岩体是中国唯一的岩体型斜长岩.