名  称：球状玄武岩

成  因：凝固后的玄武岩暴露于地表，因气、水热液及各种微生物等沿不同方向裂隙侵入，由表及里、层层风化剥离，最终形成椭球状、球状岩块。是物理风化和化学风化联合作用的结果。

形成时代：第四纪更新世

采集地点：内蒙古苏尼特左旗

Name：Spherical Basalt

Genesis：Consolidated basalt was exposed to air, which experienced weathering from surface inwards due to involvement of air, hydrothermal fluids and microorganism along fractures, resulting in spheroid or ball-like rocks.

Age：Pleistocene, Quaternary

Sample site：Sunitezuo, Inner Mongolia