Here's why:

* Vast reserves: The basin holds the largest coal reserves in Kazakhstan, and is among the top ten coal-rich regions globally.

* Long history: Mining operations began in the early 20th century, with Karaganda becoming a major industrial hub.

* Economic significance: Coal mining remains a significant contributor to the Kazakh economy, providing jobs and energy resources.

While other minerals are present in the region, like iron ore and manganese, coal mining remains the dominant and most well-known industry in the Karaganda Basin.