0 a white or light grey rock that is used as a building material and in the making of cement -- 石灰石；石灰岩
Limestone fragments and a few silicified grains (chert) are present, within a calcite spar cement.
The margins of some of the limestone blocks are slickensided.
The combined effects of less erosion-resistant marly limestone and the columnar jointing of basalts caused the rapid migration of the knickpoint toward the upstream reach.
The landscape is flat and the geology is dominated by limestone.
The book is then divided into sections which cover all habitat types: coastal, freshwater, lowland rainforest and other lowland forest formations, limestone habitats and mountains.
The sections also contain subordinate amounts of siltstone, limestone and dolostone.
Apart from a relatively prominent limestone bed, the entire succession consists of shallow-water sandstones and subordinate mudstones.
The limestone bands weather proud in cliff exposures.
