Similar analogy is an approach of discovery

creation

prediction in scientific researches.A basic principle of geological research is that the present is the key to the past and this is closely related to similar analogy.The analogy is a logic method but dominated by thinking in images which is the foundation of analogy and the start point of association and summary.The principles of analogy are that:1.dynamic state is higher than static state

that is to say

static textural analogy must be improved to systematical and coherent dynamic analogy;2. resemblance in spirit is louder than that in appearance

the function of that is creation and this is reconstruction;3.entirty is greater than sum in the accumulation of knowledge and the key must be adopted derivative method which is constantly assembled for similar information and sought for principles through phenomenon.