* Earth's Composition is Varied: The Earth's crust is not uniform. It's made up of different rock types, including sedimentary, igneous, and metamorphic rocks. The proportions of these rocks vary significantly depending on location.
* Depth Matters: The outermost 10 miles encompasses a range of depths, from the surface down to the top of the Earth's mantle. Sedimentary rocks are primarily found in the Earth's crust, which is the outermost layer. However, the thickness of the crust varies greatly across the planet.
* Geological Processes: The distribution of sedimentary rocks is influenced by geological processes like plate tectonics, erosion, and deposition. These processes continuously shape the Earth's surface, changing the distribution of rock types over time.
Instead of a specific number, here's a more general understanding:
* Sedimentary rocks are abundant: Sedimentary rocks form a significant portion of the Earth's surface, particularly in areas like continents, river valleys, and ocean floors.
* Crustal Variation: The amount of sedimentary rock within the outermost 10 miles would be much higher in areas with thick continental crust than in areas with thin oceanic crust.
To get a more specific answer, you would need to define a specific location and consider the geological history of that area.
