they are useful by showing where the fossil is buried then on that certain layer, it will be studied to know the age.
Index fossils
Moon rocks resemble rocks from the Earth's crust layer. They are predominantly composed of igneous rocks like basalt and anorthosite, similar to those found on Earth's crust.
In order to be useful in determining the relative ages of rocks, an indicator must provide different indications for rocks of different ages, right? So how could something which doesn't change over time be useful?
The Asthenosphere.
The layer of the Earth that contains rocks, minerals, and soil is the Earth's crust. It is the outermost layer of the Earth and is divided into tectonic plates that float on the semi-liquid layer below called the mantle.
the outer most layer of earth is CRUST
Rocks are extracted from the Earth's crust, which is the outermost layer. This is where most of the solid rocks are found, including those suitable for mining and quarrying.
The layer of Earth made up of loose rocks and soil is the Earth's crust. It is the outermost layer of the Earth and is where most geological activity, such as earthquakes and mountain-building, occurs.
LITHOSPHERE.
The layer of the Earth that is primarily made of rocks and soil is called the crust. The Earth's crust is the outermost layer of the planet and is divided into two types: continental crust (underlying land masses) and oceanic crust (underlying ocean basins).
crust and mantle
rocks