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Is the layer of rock at the bottom of a sedimentatry rock younger or older?
The layer of rock at the bottom of a sedimentary rock is older. This is due to the principle of superposition, which states that in an undisturbed sequence of rock layers, the oldest rocks are at the bottom and the youngest are at the top.
What is a sedimentary rock in which the older rocks unless disrupted are on the bottom?
This type of sedimentary rock is called a "nonconformity." It occurs when younger sedimentary layers are deposited on top of older, often deformed or eroded, igneous or metamorphic rocks. Nonconformities indicate a significant gap in the geological record due to erosion or tectonic activity.
In layers of undisturbed sedimentary rock the oldest rocks are on the?
Factors such as wind, ice, and warder contribute to sedimentary build up. As this occurs older layers of sedimentary rock are driven lower while newer layers replace them closer to the surface.
What law suggests that older rock strata are at the bottom and younger rock strata are at the top?
The law that suggests that older rock strata are at the bottom and younger rock strata are at the top is the law of superposition. This principle states that in an undisturbed sequence of sedimentary rocks, the oldest rocks will be at the bottom and the youngest at the top due to the natural layering process over time.
According to the Law of Superposition the bottom rock layer is the what?
According to the Law of Superposition, the bottom rock layer is the oldest layer in a sequence of sedimentary rocks. This principle states that in undisturbed strata, younger layers are deposited on top of older layers, allowing geologists to determine the relative ages of rock formations. Thus, the layers at the bottom are older than those above them.
When on a geologic column the oldest rocks are located where?
The oldest are located at the bottom of an undisturbed column.
What rock is made of older rocks from a period of time?
sedimentary
What are sedimentary rock composed of older rocks called?
Sedimentary rocks composed of older rocks are called "conglomerate" or "breccia." These rocks form when fragments of older rocks are compacted and cemented together to create a new rock.
What are the older rocks that lie under younger rocks?
The older rocks that lie beneath younger rocks are referred to as "bedrock" or "subsurface strata." In geological terms, this relationship is described by the principle of superposition, which states that in an undisturbed sequence of sedimentary rocks, the oldest layers are at the bottom and the youngest are at the top. These older rocks may include various types of sedimentary, metamorphic, or igneous formations that have been buried and subsequently overlain by newer deposits.
How is sedimentary rocks like the rings in a tree?
Just as the rings in a tree get older as you count towards the centre of the trunk, so layers of sedimentary rock are older the further down a sequence you look.
Is the extrusion older or younger than top and bottom rock?
To determine if the extrusion is older or younger than the top and bottom rock layers, you can apply the principle of superposition, which states that in an undisturbed sequence of sedimentary rocks, the oldest layers are at the bottom and the youngest are at the top. If the extrusion cuts through the rock layers, it is younger than the rocks it intrudes. Conversely, if the rock layers wrap around the extrusion, then the extrusion is older. Without specific details about the geological context, this is the general approach to answering the question.
Why sedimentary rocks could not have been the first rocks on earth?
Sedimentary rocks form from the accumulation of sediment such as sand, silt, or clay. For sedimentary rocks to form, there must be pre-existing rocks that weather and erode to produce sediment. Therefore, sedimentary rocks could not have been the first rocks on Earth as they require the presence of older rocks to form.
