Question 19 name the 2 major physiographic features found along the eastern boundary of the major pate to the south: ridge question 20 what type of boundary is found along the eastern boundary of the major pate to our south question 21 what type of magma and lava is formed along the castern boundary of the major pate to our south question 22 what type of extrusive igneous rock is formed along the eastern boundary of the major pate to our south question 23 how deer are the earthquakes along the eastern boundary of the major pate to the south question 24 the intensity of the earthquakes along the eastern boundary of the major pate to our south are to moderate.