its superposition
The fundamental concept you are referring to is the Law of Superposition. It states that in an undisturbed sequence of sedimentary rocks, the oldest rocks are found at the bottom, while the youngest rocks are found at the top.
Younger than the layer below it.
In geology, the law of superposition states that in any undisturbed sequence of rocks that are deposited in layers, the oldest layers are on the bottom. Each layer is younger than the layer below it.
The principle of superposition states that the higher layers are younger because they must be laid down on a layer below, which is therefore older, can be used in cross-sections. Each layer, going up, is younger than all the previous layers.
The layer above the 120 million-year-old layer must be younger, and the layer below must be older. So, the layer above the middle layer will be younger than 120 million years, and the layer below the middle layer will be older than 120 million years.
The fundamental concept you are referring to is the Law of Superposition. It states that in an undisturbed sequence of sedimentary rocks, the oldest rocks are found at the bottom, while the youngest rocks are found at the top.
Younger than the layer below it.
In geology, the law of superposition states that in any undisturbed sequence of rocks that are deposited in layers, the oldest layers are on the bottom. Each layer is younger than the layer below it.
The law or principle of superposition.
The principle of superposition states that the higher layers are younger because they must be laid down on a layer below, which is therefore older, can be used in cross-sections. Each layer, going up, is younger than all the previous layers.
The law of superposition states: in horizontal rock layers, each layer is older than the one above it and younger than the one below it.
Below the age of majority and in most states no younger than 16.
Every layer of rock, as one moves up from the core, is younger than the one below it. This means that the layers of rock above and below the coal are different ages, with the one above younger and the one below older.
By observation:- If you have 3 jars of different colored sand and you pour them one after the other into a clear glass container, they will form 3 layers one on top of the other. The oldest layer (the one you poured in first) will be at the base, underneath the other two. The second layer, the one you poured in next will be on top of the first but underneath the last. The third layer will be on top of all the rest and will be the one you poured in last. Thus rocks are laid down with the older layers at the base and getting younger as you go up. This is called "the law off superposition".
The layer above the 120 million-year-old layer must be younger, and the layer below must be older. So, the layer above the middle layer will be younger than 120 million years, and the layer below the middle layer will be older than 120 million years.
The sequence shown is "ACAGTGC".
The layers above the 120 million-year-old middle layer are likely younger, while the layers below are likely older. This indicates a relative chronological sequence in the deposition of the rock layers, following the principle of superposition in geology.