Rocks which contain fossils are
Sedimentary rocks
Metamorphic rocks
Igneous rocks
Erosion
Percolation
Weathering
Retention
Rocks
Minerals
Fossils
None of these
The thinnest layer of the earth is
Crust
Mantle
Core
Sandy soil
Loamy soil
Clayey soil
Mixture of sand and loam
Petrology
Pedology
Meteorology
Hydrology