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.
Significant Figures is important in scientific calculations because it deals with a problem of measurements. Without significant figures, it is difficult for some scientist to â¦ calculate very large and small measurements.
Significant Figure Rules. 1  Non-zero digits are always significant. 2  All zeros between other significant digits are significant. 3  The number of significant figures is determined starting with the leftmost non-zero digit.  The rightmost digit of a decimal number is the least significant digit or least significant figure.