Es Names Homework 2 l. A series of volcanic Islands belonging to the same tecton

Question

Es Names Homework 2 l. A series of volcanic Islands belonging to the same tectonic plate has moved over a hot spot The table below lists the ages of rocks colected from each of these islands (in milions of years before present), and the present day dstance of each from the hotspot 50, i the age is gven as (as is the case for isiana # 1), it means tarths island currendy ies on top of the hat spet Rate for each segment in cm/y Distance from hat spot in km #2 4 5 300 #3 11.1 Bco a) Caicuiate the rate of movement of the plate carrying these slands in cmi yr (1 km 1000m 1m 100 cm) aver the past 45 my b) Calculate the rate of movement of ne same plate between 11.1 and 4.5 m.y c) Has the rate remained the same? itf not, has the velocity increased or decreased? Hint Velocity frate of movement) distancel ome

Explanation / Answer

1) TO CALULATE THE RATE OF MOVEMENT OF PLATE WE WILL DIVIDE DISTANCE THE ISLAND FROM THE HOTSPOT BY THE AGE OF PLATE SO,

4.5 MY=4.5*1000000Y

DISTANCE IN KM=300

=300*1000*100CM

RATE = 30000000/4.5*1000000

=6.6CM/Y

2) RATE OF MOVEMENT=DISTANCE/AGE

600*100000/(11.1-4.5)*1000000

=60000000/6600000

=9.09CM/Y

3) NO THE RATE IS NOT SAME BUT THE VELOCITY HAS INCREASED.

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