The solid rock parts of Earth are primarily found in the lithosphere. This is the rigid outermost layer of the Earth, consisting of the crust and the uppermost part of the mantle.

Here's a breakdown:

* Crust: This is the thin, outermost layer of Earth, composed of solid rock. There are two types:

* Continental Crust: Thicker and less dense, making up the continents.

* Oceanic Crust: Thinner and denser, making up the ocean floor.

* Upper Mantle: This layer is mostly solid but can flow very slowly over long periods.

So, the parts of Earth that are solid rock are:

* Continents: Made of continental crust.

* Ocean Floor: Made of oceanic crust.

* Mountain Ranges: Formed from the uplift of the Earth's crust.

* Plateaus: Elevated areas of flat land.

* Canyons and Valleys: Formed by erosion of solid rock.

It's important to note that while the lithosphere is solid, it's not completely rigid. It's broken into large pieces called tectonic plates that move slowly over time, causing earthquakes, volcanic eruptions, and the formation of mountains.