To determine what type of rock the scientist found based on the average densities provided, we need to compare the density of the rock found by the scientist with the average densities of the listed rocks.
The average densities are as follows:
- Shale: 2.0 g/cm³
- Quartzite: 3.0 g/cm³
- Sandstone: 2.5 g/cm³
- Marble: 2.7 g/cm³
- Limestone: 1.2 g/cm³
Without the specific density of the rock the scientist found, we cannot determine which type of rock it corresponds to.
If you provide the density of the rock found by the scientist, I will be able to help identify the type of rock.