Oceanic-oceanic plate convergence also results in the formation of undersea volcanoes. Over millions of years, however, the erupted lava and volcanic debris pile up on the ocean floor until a submarine volcano rises above sea level to form an island volcano.est Answer: When two oceanic plates converge one is usually subducted under the other and in the process a deep oceanic trench is formed.
The more significant figures the more accurate the data will be. Significant figures are important because they indicate the degree of accuracy - the minimum amount by which a quantity is distinguished to be different from a similar amount. The more significant figures the more accurate the data will be.
A significant figure is the number of digits to the left of the  decimal place from the right most non zero digit to the left most  digit, or the number of digits from the râ¦ight most digit to the  right of the decimal place to the left most digit. So, 5748 to two  significant digits is 5700.