(Table 1) Selected microprobe analyses of clay minerals occurring in a black ...

Sample 506 is a hyalopilitic, fine-grained, highly vesicular basalt with rare plagioclase and clinopyroxene phenocrysts. It shows a 2-2.5-mm-wide black halo.样本506为具玻基交织结构（hyalopilitic）的细粒高气孔玄武岩，含有少量斜长石（plagioclase）与单斜辉石（clinopyroxene）斑晶，可见宽度为2~2.5毫米的黑色晕圈。