To determine the type of rock the scientist found, we need to compare the density of the rock found with the average densities of the rocks provided in the table.
From the options given:
- Shale: 2.0 g/cm³
- Sandstone: 2.5 g/cm³
- Limestone: 1.2 g/cm³
- Quartzite: 3.0 g/cm³
If the density of the rock found is closer to any of these values, that would help identify it. However, since the problem doesn't provide the density of the rock found, we can't definitively determine the type of rock without that information.
Please provide the density of the rock found if you'd like me to help identify its type based on this data.