What are some rock types in Guyana?

* Igneous rocks: These are formed when magma or lava cools and solidifies. Some common igneous rocks in Guyana include granite, diorite, and gabbro.

* Metamorphic rocks: These are formed when existing rocks are changed by heat, pressure, or chemical reactions. Some common metamorphic rocks in Guyana include slate, schist, and gneiss.

* Sedimentary rocks: These are formed when sediments are deposited and compacted over time. Some common sedimentary rocks in Guyana include sandstone, limestone, and shale.