For example, the folding of the strata in a mountain range will often be explained by the law of folding. The law of superposition does not mean that all geologic features can be explained solely by superposition. For example, the shape of rivers can be explained through a combination of the law of superposition and the law of sedimentary basin development. In many cases, the law of superposition may be seen to be the most important fundamental principle behind a particular feature, rather than the sole explanation. The law can also be used in the field of sedimentary geology to explain many kinds of rock features. The law is the basic principle behind many kinds of stratigraphy, which can be described as the study of the temporal distribution of rock strata. So, in effect, the surface of the ground is made up of the surface of the younger material, overlain by layers of older material. A rock can be described as young if it is made up of smaller and more poorly sorted material and old if it is made up of larger, more well-sorted material. the closest to the surface that erosion will reach). The law of superposition in sedimentary rocks is based on the observation that the oldest rocks tend to be closest to the surface of the earth (i.e. Law of superposition in sedimentary rocks In the Himalayas, the highest mountains occur in places where layers have steeply tilted relative to each other, which tends to create more and taller mountains. The law is also very useful in explaining the formation of glacial features such as, for example, the U-shaped course of the River Rhine, which is made possible by the greater thickness of older sedimentary layers that overlie the younger ones. However, the layers of a valley are younger than the layers above them, and as a result, the valley bed slopes downward as it is weathered. Water-deposited material that is deposited horizontally tends to be weathered into flat, horizontal layers which may even be completely horizontal. The law of superposition explains why streams follow specific paths across surfaces such as rivers, where the layers are often more or less vertical. The Law of Superposition is not valid in all cases. This relationship is also demonstrated by the fact that all the rocks in a rock body were originally in a layer-by-layer position, but became separated in time and position due to changes in the physical and chemical properties of the rock that took place during their evolution. Rocks with the same stratigraphic position or sequence in a vertical column can be found at different depths in a single rock body. Rocks can also be seen in contact in a vertical direction if they form part of the same rock body. This includes layered sedimentary rocks (stratified rocks that are not in a layer-by-layer arrangement) and horizontally layered rocks. The Law of Superposition can also be seen in rocks that are not stacked in a vertical sequence. The horizontal extent of the rock layers is very similar in most places, despite a variety of changes in conditions over time, such as erosion and deposition. These layers can be seen directly when they are exposed to the Earth's surface. The relationship is demonstrated on Earth's surface through a comparison of stratigraphic columns (diagrams that display layers of sedimentary rock that are stacked in sequence in a vertical direction) from different parts of the world. The contact usually occurs because the younger layer has flowed into the older layer, although the contact can also be due to the older rock being intruded into the younger layer. This means that the layers are close in time, or younger than the layer above. These layers of rock are always seen in contact with each other. The Law of Superposition is demonstrated in the layers of rock found in mountains and hills on the Earth's surface. The Law of Superposition can be seen in both vertical and horizontal layers of rock, such as on the Earth's surface. By applying the Law of Superposition, geologists can determine the relative ages of rock strata in order to reconstruct history, and also help geologists determine the age of geologic structures such as mountains and volcanoes, that appear in the middle of existing rock layers. It states that rock layers are always in contact with younger rock layers (but not with older ones), because younger rock layers are younger and therefore more closely related in time to the older layers. The Law of Superposition is a geologic principle, first observed and named by Friedrich von Schiller in 1785.
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