To calculate the rate of motion of the Amur plate, we can use the formula:
\[ \text{Rate of motion} = \frac{\text{Distance moved}}{\text{Time taken}} \]
The distance moved is 125,000 meters, and the time taken is 25 million years (25,000,000 years).
\[ \text{Rate of motion} = \frac{125,000 \text{ m}}{25,000,000 \text{ years}} = 0.005 \text{ m/year} \]
So, the rate of motion of the Amur plate is 0.005 meters per year.
Next, to find where the plate would be after 1 million years, we can multiply the rate of motion by the time in years.
\[ \text{Distance after 1 million years} = \text{Rate of motion} \times \text{Time} = 0.005 \text{ m/year} \times 1,000,000 \text{ years} = 5,000 \text{ m} \]
Thus, after 1 million years, the Amur plate would be 5,000 meters from its starting position.
Regarding the geologic feature that will form between the Amur and Eurasian plates, the movement of tectonic plates generally leads to the formation of various features depending on the type of boundary (convergent, divergent, or transform). Given that the Amur plate is moving away from the Eurasian plate, this suggests a divergent boundary, which often leads to the formation of features such as rift valleys or mid-ocean ridges. In this case, a rift valley is the most likely geologic feature that would form between the Amur and Eurasian plates.
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