We appreciate your visit to Volcanic rocks on the Hawaiian island of Kauai are roughly 4 8 million years old Since Kauai is approximately 480 kilometers from the Big Island. This page offers clear insights and highlights the essential aspects of the topic. Our goal is to provide a helpful and engaging learning experience. Explore the content and find the answers you need!
Answer :
The rate of motion of the Pacific plate relative to the underlying mantle can be estimated by using the age of the volcanic rocks on the Hawaiian island of Kauai and the distance between Kauai and the Big Island of Hawaii.
The age of the rocks indicates the time it took for the Pacific plate to move away from the hotspot that formed the Hawaiian Islands. The distance between Kauai and the Big Island of Hawaii is also significant because it allows us to calculate the average speed of the Pacific plate.
Assuming that the hotspot that formed the Hawaiian Islands has been stationary over time, we can estimate that the Pacific plate has moved 480 kilometers in 4.8 million years.
Therefore, the average rate of motion of the Pacific plate relative to the underlying mantle is approximately 10 centimeters per year. This rate is consistent with the rates of motion estimated for other oceanic plates and is consistent with the theory of plate tectonics.
It is important to note that the rate of motion of the Pacific plate is not constant and may vary over time due to changes in the underlying mantle dynamics. However, the estimate of 10 centimeters per year is a good approximation for the long-term motion of the Pacific plate relative to the mantle.
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