* Granite is not a uniform layer: The Earth's crust is incredibly complex. Granite is found in various locations and depths, depending on geological history and formation processes.
* The Earth's composition is diverse: The crust is made up of many different rock types, including basalt, sandstone, limestone, and more.
* The transition zones are gradual: The boundaries between rock types aren't sharp lines. There are often transitional zones where different rock types intermingle.
Instead of a single distance, we can look at the general context:
* Upper Crust (0-20 km): Granite is a common rock type in the upper crust, especially in continental areas.
* Lower Crust (20-35 km): As you descend, granite is less common, and you'd encounter more mafic (darker) rocks like gabbro.
* Mantle: Below the crust lies the mantle, composed of peridotite (a dense, magnesium-rich rock).
So, while there's no specific depth to avoid granite, you'd likely encounter a transition zone to other rock types as you go deeper into the Earth's crust.
