以羽状物形态从地幔深处升至岩石圈表面的炽热岩石露头被称之为“热点”。这种羽状物的形成与某一地区的不稳定性高温有关。但是有关羽状物源埋藏多深的问题一直是专家们争论的对象。美国加利福尼亚工学院和加利福尼亚州立大学的地震学家们确定,冰岛和夏威夷“热点”的根部位于 The hot rock outcrop rising in the plume form from the depths of the mantle to the surface of the lithosphere is called a “hot spot.” The formation of this plume is related to the high temperature instability in a certain area. However, the issue of how deep the plume is buried has always been the object of debate among experts. Seismologists at the California Institute of Technology and California State University have determined that the roots of Icelandic and Hawaiian “hot spots” are located at