It is possible to use gurit without damaging the surrounding rock . 使用古力特炸藥將完全可能不造成對圍巖的破壞。
If the volcano becomes inactive and cools, surrounding rock may be worn away . 如果火山變得不活動并冷卻下來,圍巖就可能被剝蝕掉。
If the surrounding rock is soft and is later worn away, the walls remain and form ridges called dikes . 如果圍巖柔軟,日后又被剝蝕掉,這種巖壁就下來形成山脊,稱為巖墻。
The increase in temperature influences the physical behaviour of the waste and the surrounding rocks and must, therefore, be kept under control . 溫度的升高會影響廢料以及圍巖的物理狀態(tài),因此必須使之保持受控狀態(tài)。
The ore is partly massive and partly disseminated (veinlets and speckles) and there is a halo of disseminated minerals in the surrounding rock . 礦石部分呈塊狀,部分呈浸染狀(細脈狀和斑點狀),圍巖中并有礦物的浸染暈存在。