Basalt doesn't have a specific thickness. It's a type of igneous rock formed from cooled lava, and its thickness can vary greatly depending on the geological context:

* Lava Flows: Individual basalt flows can be anywhere from a few centimeters to tens of meters thick.

* Volcanic Plateaus: These vast areas formed from repeated eruptions can have basaltic layers hundreds of meters thick.

* Oceanic Crust: The majority of the Earth's oceanic crust is composed of basalt, typically about 5-7 kilometers thick.

* Continental Basalt Flows: Basaltic lava flows can occur on continents, and their thickness can vary depending on the eruption and the terrain. Some continental basalt flows can be hundreds of meters thick.

In summary, the thickness of basalt depends on the specific geological situation.