Dolomite limestone - limestone

Japanese: 苦灰質石灰岩 - くかいしつせっかいがん

...A sedimentary rock mainly composed of dolomite (CaMg(CO ₃ ) ₂₎ or a similar composition. To avoid confusion, this name is used to distinguish it from the mineral dolomite, but it is not necessarily used widely. It is also called dolomite or dolomite. Carbonate rocks containing 50% or more dolomite are included in dolostone, and those containing less than that are called dolomitic limestone. Some people believe that rocks containing 80% or more dolomite should be called dolostone. Most dolostones are formed by the replacement of CaCO ₃ with CaMg(CO ₃ ) _2. ...

From [Dolomite]

…It is similar to calcite, but does not bubble easily in cold acid. When part of limestone becomes dolomite, it is called dolomite limestone. Dolomite is named after the French geologist and mineralogist Gratet de Dolomieu (1750-1801). …

*Some of the terminology explanations that refer to "dolomite limestone" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…主としてドロマイト(苦灰石あるいは白雲石)CaMg(CO₃)₂あるいはそれに近い組成の堆積岩。混乱をさけるために鉱物名ドロマイトと区別してこの名を用いるが，必ずしも広くは使用されていない。苦灰岩あるいは白雲岩ともいう。ドロマイトを50％以上含む炭酸塩岩をドロストーンに含め，それ以下はドロマイト(苦灰岩)質石灰岩という。ドロマイトが80％以上のものをドロストーンと呼ぶほうがよいという意見もある。ほとんどのドロストーンはCaCO₃がCaMg(CO₃)₂で置換されることによって形成される。…