Difference Between Limestone and Chalk l Limestone vs Chalk

Chalk has many favorable properties. For example, it has a great resistance to weathering, slumping than the associated clays. Therefore, this mineral forms tall, steep cliffs. We can mine chalk from chalk deposits. These deposits may occur both above ground and underground.

There are many uses of this mineral. Among all, the most common application is the manufacture of blackboard chalk. In addition to that, we can use it as a source of quicklime (via thermal decomposition reactions) or as a source of slaked lime (via quenching quicklime with water). Moreover, we can use chalk to fit the woodworking joints.

What is the Difference Between Limestone and Chalk?

Limestone is a sedimentary rock which contains two major types of minerals; calcite and aragonite. This is because it formsĀ  as a result of the deposition of skeletal fragments of marine organisms such as coral, forams and molluscs. Whereas, chalk is a form of limestone containing calcite as the major mineral; about 99%. This is because it forms from the accumulation of calcite shells of the microorganism coccolithophores. Moreover, chalk contains flints. The below infographic presents more details on the difference between limestone and chalk.

Difference Between Limestone and Chalk l Limestone vs Chalk