Part I: Genesis as our Foundation?
First and foremost, why even bother? Does it even matter? Cannot we just believe in Jesus and all that He did? Does Genesis, chapters one through eleven even matter to what happened in the Gospels? What is at risk if we leave Genesis as old fables? These are good questions which need to be answered. The answer is yes. It does matter. Everything is at risk if we leave Genesis as old fables.
Why? Because Jesus Himself taught from Genesis (for example, He quotes Genesis 2:24 in Mark 10:7), and the Gospel is revealed in Genesis. The Gospel makes sense because of Genesis. Why are we here? Why do we sin? What is sin? Why is there suffering? All the answers are revealed in Genesis. If we do not believe that Genesis is real history, the Gospel makes no sense, and we call God a liar, making ourselves the judge of everything, a sad example of Humanism. Humanism is an anti-Christian religion that makes man equal or greater than God.
If Genesis is not real history, then why believe any of the Bible, and, since man is the judge of truth (so says Humanism), then there must be no God. This leads to atheism, the complete rejection of God. Evolution, which briefly, believes life evolved from non-life, is often coupled with atheism, as its answer to our origins.
But the Bible whole-heartedly disagrees, and the creation screams out saying it was created. Indeed, all the natural laws point to a Creator.
Therefore, without Genesis there is no truth in Christianity. We need to use Genesis as our foundation, because 1) Its use of language portrays it as a historical narrative, and 2) Jesus used it as His foundation, and 3) the character of God shows us that, since God is truth (John 14:6) and there is no sin in Him (1 John 3:5), and because the Bible is ultimately written by Him, Genesis must be true.
Now that I have shown why we need to use Genesis as our foundation, we have an additional question needing to be answered. How does Genesis relate to our study of geology? In Genesis, we read about some of the greatest geological events in all of history, the Creation, and the Flood. In the Creation, we see a huge amount of rocks created, and in the Flood huge amounts of sediments were laid down. Also, the fountains of the great deep broke open (Genesis 7:11), creating volcanoes and volcanic rocks.
Part II: Why We Need a Biblical Geologic Model
Geology has been infiltrated by uniformitarianism, an idea that believes that present processes have been working at the same rate, and only these processes have been working through all of history. However, it has been added that only seldom by punctuated cataclysmic events have occurred, for example large volcanic eruptions, Ice Age Floods, etc.
Uniformitarianism, materialism, and naturalism are all interrelated, by all three worldviews rejecting God in their presuppositions. Presuppositions are preconceived ideas, or ideas believed beforehand, that one uses for interpreting the world around them.
Everybody has presuppositions, but the problem with the three above listed beliefs is they believe that
1) No God exists
2) Even if some god exists, he has never done anything to interfere with the natural processes of the universe.
These views claim to have authority and are therefore “correct” because it claims that science supports it. However, science cannot tell us what exactly happened in the past, and it cannot answer the fundamental questions of “Why am I here?”, “What is right and wrong?” etc. Because science cannot tell us what happened in the past, the past is only to be known by someone who was there. In Creation, only one Person can do just that, the Creator God. In evolution, no god exists, and therefore there is no foundation for morals, no knowledge of the past, and no idea of the future. “But can’t we know about the past through science?”, one may ask. However, science can only deal with the present, although there are ways to explain the past by science.
But the problem is that data can be explained by many different hypothesis and still not be correct. For example, there are some rock formations that are “characterized by graded bedding, moderate sorting, and well-developed primary structure, especially laminations.” They were explained by using uniformitarianism, that slowly, over perhaps millions of years, accumulated at the bottom of a lake or sea while the water level was slowly lowering. If you agree with uniformitarianism, it is not a bad idea, but it was later found to be created by turbidity currents, a process that takes mere minutes, not millions of years.
There is the catch, science cannot fully tell us the past, but it can give us an idea of what happened in certain areas to a certain extent. That is why we need the Bible and a Biblical geologic model, to give us a set of presuppositions, a worldview, with which to study with. This is important, because the Flood was a huge, geologic event that would need to be factored into our study of geology. Thus, setting us the reasons why we need a biblical geologic model. Next time, we will talk about what is a Biblical Geologic Model.
 Bates, R. L., Jackson, J. A., & American Geological Institute. (1984). Dictionary of Geological Terms (3rd ed). Garden City, N.Y: Anchor Press/Doubleday.