What does the term "strata" refer to in coal mining?

In the context of coal mining, "strata" refers specifically to the layers of rock or soil that contain coal deposits. Understanding the geological formation and arrangement of these layers is essential for miners, as it impacts the methods used for extraction and the feasibility of mining in certain areas. Each layer, or stratum, may have different properties, such as thickness, mineral content, and stability, which are crucial for determining the safety and efficiency of mining operations.

This geological understanding aids in exploration efforts, allowing miners to identify where coal is most likely to be found and to assess the potential economic viability of a mining site. Hence, recognizing strata helps in planning and executing coal mining projects effectively.