calcareous tuff

基本解释

Building material including concretes, calcareous tuff and glass.
建筑材料包括混凝土、石灰华和玻璃。
The Saliyak melange consists of dark-gray to black muddy and silty microclastic rock with intercalation of grayish purple and grayish green calcareous and muddy shale, marl and tuff.
西昆仑赛力亚克混杂堆积由形态、颜色和大小各异的沉积岩块体以及黑色泥质粉砂岩夹灰紫绿色钙质页岩、泥灰岩和层凝灰岩的基质组成。
The original rocks of the mineral deposit are rhyolite and tuff. Due to hydrotherma1 alteration under proper conditions the ore can be formed. It is also shown that the bentonites are calcareous ones.
综合研究表明，该矿床是以流纹岩及凝灰岩为成矿原岩，在特定的条件下，经热液蚀变改造而形成的矿床。
geology.nju.edu.cn