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What is the evidence of seafloor spreading?
Animal fossils have been found in many places in the ocean.
What is the pattern of seafloor age in the ocean basins?
The pattern of seafloor age in ocean basins generally shows that the youngest seafloor is located at mid-ocean ridges, where new oceanic crust is formed through volcanic activity. As you move away from these ridges, the age of the seafloor increases, with older crust found near the continental margins. This pattern is a result of the process of seafloor spreading, which continuously pushes older crust away from the ridges. Consequently, the age of the seafloor increases symmetrically on either side of the mid-ocean ridges.
How did fossils provide evidence for contental drift?
Because, similar fossils could be found on different continents, in rocks of the same age.
What are index fossils and how are they used to determine the absolute age of sedimentary rocks?
Index fossils can be used to help determine the relative age of rock layers. Index fossils are from species that only existed for a short time. Index fossils are found in rock layers. Trilobites and Graptolites are index fossils.
Are fossil is usually about the same age as the sediment layer in which it is found?
Yes, fossils are generally found in sedimentary rock layers that correspond to the time period during which the organisms lived. The principle of superposition indicates that older sediment layers are found beneath younger layers, so fossils typically reflect the age of the surrounding sediments. However, in some cases, fossils may be disturbed or reworked, leading to discrepancies in age. Overall, the sediment layer provides a useful context for dating fossils.
What is the evidence of seafloor spreading?
Animal fossils have been found in many places in the ocean.
Are dinosaur fossils ever found on the north pole?
No. Under the north pole is seafloor. Dinosaurs were land-dwellers
What is the pattern of seafloor age in the ocean basins?
The pattern of seafloor age in ocean basins generally shows that the youngest seafloor is located at mid-ocean ridges, where new oceanic crust is formed through volcanic activity. As you move away from these ridges, the age of the seafloor increases, with older crust found near the continental margins. This pattern is a result of the process of seafloor spreading, which continuously pushes older crust away from the ridges. Consequently, the age of the seafloor increases symmetrically on either side of the mid-ocean ridges.
What is the age of fossils that can be measured by what dating?
Fossils themselves can very rarely be dated by any means...their age is usually judged by the geological assessment of the area and layer in which they are found
Why do scientist use radioisotopes to find the age of fossils?
Radiometric dating of fossils is not possible beyond roughly 70,000 years. However, when fossils are found in association with strata of volcanic and metamorphic rocks which can be dated radiometrically, a very accurate age of the fossils can be determined.
What is the age of fossils found in west Serengeti Tanzania?
5,000,000,000,000 years old
How did fossils provide evidence for contental drift?
Because, similar fossils could be found on different continents, in rocks of the same age.
How index fossils can be used to determine the age of rocks?
Index fossils are used to date rocks by correlating the fossils found in the rock layers with known ages of those fossils. Index fossils are distinctive, widespread, and lived for a relatively short period of time. By identifying these fossils in a rock layer, scientists can infer the age of the rock based on the age range of the known fossil.
What are index fossils and how are they used to determine the absolute age of sedimentary rocks?
Index fossils can be used to help determine the relative age of rock layers. Index fossils are from species that only existed for a short time. Index fossils are found in rock layers. Trilobites and Graptolites are index fossils.
How fossils can be used to determine the absolute and relative age of a sedimentary rock layer?
Perhaps by carbon dating and by comparing with the evolution and dominance of various organisms in the geological time scale.
How can the age of a rock be related to fossils?
If a lava flow or bed of volcanic ash was dated using isotopic dating methods and fossils were found in a sedimentary rock beneath the volcanic rock, it can be surmised that the fossils were older than the lava or ash. If the same species of fossils were found in another part of the world it would make sense that the rocks there were the same age as previous fossils. By cross checking with many other areas with other volcanic rocks, it can be found that all the rocks around the world containing those fossils were of a similar age.
What is the age of fossils?
Fossils have been found with ages from a few tens of thousands of years old to roughly three billion years old.
