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Yes. Because sedimentary rocks are often found on the surface of the earth, they are easily exposed to weathering. The longer a rock is out in the open, the softer it will become due to weathering, until it turns into sand. (This process takes millions of years depending on the size of the rock, however.)
What else can I help you with?
In a plutonic dome the age of the rocks in the exposed core of the dome are compared to the sedimentary rocks around the core?
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Why is radiometric dating less useful to date sedimentary rocks than igneous rocks?
Radiometric dating is less useful for dating sedimentary rocks because they are made up of material that has been transported and deposited from other sources, making the age of the sedimentary rock different from the age of the material within it. Igneous rocks directly crystallize from magma and accurately retain the age of their formation through radiometric dating.
How old are most sedimentary rocks?
Sedimentary rocks can vary in age from recent (formed within the last few years) to billions of years old. The age of sedimentary rocks depends on when the sediments were deposited and how long they have been exposed to processes like compaction and cementation to form rock.
Which is older igneous or sedimentary?
Igneous rocks are typically older than sedimentary rocks. Igneous rocks form from the cooling and solidification of molten material (magma or lava), which usually happens before the formation of sedimentary rocks through processes like erosion, deposition, and compaction.
What two things do sedimentary rocks record?
Sedimentary rocks can record information about the environment in which they formed, such as the presence of water, wind, or ice. They can also preserve evidence of the organisms that lived in that environment, including fossils.
Which dating method enables scientists to measure or estimate the absolute age of sedimentary rock?
Radiometric dating of igneous rocks that relate to the sedimentary rock
Are only sedimentary rocks used for relative age determination?
No, sedimentary rocks are commonly used for relative age determination due to their layering and formation process. However, other types of rocks like volcanic rocks and metamorphic rocks can also be used to determine relative age based on principles of superposition, cross-cutting relationships, and faunal succession.
Is it true to say that radioactive istopes in clastic sedimentary rocks always predict an age that is younger than the sedimentary rock?
No, radioactive isotopes in clastic sedimentary rocks can provide ages that are younger, older, or similar to the actual age of the rock. The key is to select an appropriate radioactive isotope with a suitable half-life that aligns with the age range of the sedimentary rock being studied.
What factors affect the rate at which rocks abrade in running water?
Factors such as the speed of the water, the size and shape of the rocks, the amount of sediment in the water, and the duration of exposure to water all affect the rate at which rocks abrade in running water. Typically, faster-moving water and a higher concentration of sediment will cause rocks to abrade more quickly.
How do you see a sedimentary rocks age by looking at the fossils?
Find out what era the Fossil was from and then you can put a relative date on the sedimentary rock, assuming that the fossil was preserved in the sedimentary rock when it had died. It would not be the actual age because you need to date the radioactive isotopes for that.
How can the law of superposition be used to determine the relative age of sedimentary rock?
The law of superposition states that in an undisturbed sequence of sedimentary rocks, the youngest rocks are on top and the oldest are at the bottom. By observing the layers of sedimentary rock, geologists can determine the relative ages of the rocks based on their position in the sequence. The principle helps establish a chronological order of events in Earth's history.
To date a sedimentary rock layer between two igneous rock units geologists use radiometric dating and assume that the sedimentary layer and age .?
To date a sedimentary rock layer between two igneous rock units, geologists typically use radiometric dating on the igneous rocks above and below the sedimentary layer. They assume that the sedimentary layer was formed after the lower igneous layer and before the upper igneous layer, thus establishing a relative age. The ages obtained from the igneous rocks provide a minimum and maximum age for the sedimentary layer, allowing geologists to estimate its age within that timeframe. This technique relies on the principle of stratigraphy and the law of superposition.
