Showing posts with label Age of Rocks. Show all posts
Showing posts with label Age of Rocks. Show all posts

Friday, February 20, 2015

Ken Ham, Andrew Snelling, Creationism and the Challenge of Modern Geology

Recently, a story showed up in the science dailies about evidence supporting rapid canyon formation in Iceland.  First, the story that the BBC ran:
The Jokulsargljufur canyon, 28km long and up to 100m deep, is home to Europe's most powerful waterfall. By analysing the chemistry of rocks in the canyon's walls, the researchers constructed a timeline of how the canyon was shaped over time. Most changes seem to have taken place during three brief but brutal periods. Interestingly, these key flooding events occurred two, five and nine thousand years ago - separated by millennia of relative stability. Writing in the journal Proceedings of the National Academy of Sciences (PNAS), the scientists say their findings demonstrate the importance of brief but cataclysmic events in shaping landscapes.
What the story goes on to say is that each brief, but brutal period may have been a matter of days.  This is fascinating but is not unique.  A similar even occurred in eastern Washington State in the late Pleistocene when there were a series of massive floods that carved out huge areas, creating the scablands.  Consequently, while this report is interesting, there is clearly a precedent for rapid movement of sediment by fast-moving water. Another example of this is the Canyon Lake Gorge, in Texas, which was formed in one very large flood, in 2002. 

Fast, torrential floods carving huge canyons quickly out of solid rock. This was too much of an opportunity for Ken Ham to pass up. Very shortly, his post titled Secularists Say Landscapes Can Form in Days came out. (Aside: note the title.  Ham has dispensed with all pretenses of being inclusive, now considering anyone who supports an old earth and the standard geological model a “secularist.”  There can be no room in Bible-believing Christian circles for those not espousing the young earth view.  Organizations like the Association of Christian Geologists are dismissed out of hand.) Ham writes:
Researchers studying Europe’s most powerful waterfall and the canyon containing it reportedly reached the conclusion that they were “created in a matter of days by extreme flooding.” Rather than being the result of slow-and-gradual processes, these researchers believe that a series of extreme floods several thousand years apart formed the waterfall and the canyon catastrophically. They say that these “findings demonstrate the long-term impact that extreme flood events can have on landscapes.”

The leader of the study apparently stated, “We think of natural environments as being formed over thousands of years, but sometimes they are shaped very suddenly. This insight into one of Iceland’s magnificent landscapes helps us better understand these processes, and illustrates their legacy.”

Of course, we have already known that because the Bible tells us that we live on a young Earth. Geological features cannot take millions of years to form slowly and gradually because the planet isn’t that old! When we start with the Bible we know that we live on a young Earth that was radically reshaped by a massive catastrophe, the global Flood. The Flood and its aftermath explain many of the geologic features we see today.
First, it is intellectually dishonest to accept only the sections of someone's argument that you agree with and dispense with the rest.  This is, charitably, cherry-picking the data.  Ham is quite willing to agree that the Jokulsargljufur canyon was formed very quickly, but not that it represents several episodes thousands of years apart.

Ham then calls on Andrew Snelling, the resident geologist, who figured into my last post. In response to the story, Snelling writes:
This is a brief reminder that even uniformitarians are finding that the actual observational data can only explain the formation of landforms such as canyons and massive waterfalls by catastrophic floods, not the present-day slow-and-gradual geologic processes. Of course we disagree on the timescale, but agree this canyon and waterfall in Iceland were carved after the Ice Age, the one short Ice Age that occurred after the Genesis Flood. And rather than floods being thousands of years apart, they would have been only years to decades apart. Of course, this canyon formed in hardened basalt layers in contrast to the soften volcanic ash layers at Mount St. Helens, but it still resulted from catastrophic floods which carved through the solid rock as though it were soft!
Uniformatarians aren't finding anything of the sort. Snelling is clearly putting up a straw man argument by claiming that geologists conclude that canyons can only form rapidly.  There are quite a few canyons around the world that show evidence of having been formed over quite a long period of time and geologists know it. Even the geologically recent Grand Canyon has likely been forming over the last six million years. By the way, for scale purposes, the Jokulsargljufur Canyon is 300 feet deep. the Grand Canyon, which would have to have been formed in the same, rapid fashion, is, from the top of the north rim to the canyon floor, 5500 feet, or over eighteen times as deep as the Jokulsargljufur Canyon.  Its only known water source is the Colorado River. 

But the logical errors continue.  In order for their world-wide flood model to work, flood geologists must use the “part to whole” fallacy.  In other words, what is happening at the Jokulsargljufur canyon would have to be happening all over the world.  Not just canyon formation but all rock formation, everywhere.  While it is quite possible that, in some instances, magmatic rock can form quickly, its formation is very easy to spot because it is very distinctive.  But it is the only kind of rock that can form quickly.  Metamorphic and sedimentary rock, which are also quite distinctive in their appearance, take considerably longer to form.   Further, it is estimated that up to 70% of the planet's stratigraphic rock formations are sedimentary, in origin and these formation leave extensive layering.  These rocks form by means of wind, water action, glacial action and other slow processes.  They do not form quickly.  Metamorphic rock forms even more slowly than sedimentary rock because it can only form under considerable heat and pressure.  In the context of a world-wide flood, how would these rocks, which require heating to between 150° and 200°, have formed in the first place? Ham and Snelling are suggesting, in this model, that the geological column settled, hardened into rock by an as-yet undetermined very rapid heating process, and Then incised the canyon over the still-hardening rock.  They provide no explanation for how this would happen.

It is disappointing to see that, in their zeal to disregard the work of mainstream geologists and brand them all as “secularists,” a term that is surely pejorative in this context, they present arguments that fail to stand up to even rudimentary scrutiny.  This is part and parcel of young earth creationism and this example represents only a microcosm of the insurmountable problems that it faces.  It is almost as if they feel that their devotion to their understanding of scripture should be enough to sway the reader into supporting the young earth model...just don't look too closely. 


  

Wednesday, February 11, 2015

Andrew Snelling, Geology and Cooking

Sorry, this one rambles a little bit.

Jonathan Baker at Age of Rocks writes an interesting column that is a response to Andrew Snelling's preposterous statement that one can be a successful petroleum geologist and yet be a young earth creationist.  In his column, he likens the different layers of the rock record to the baking of a cake.  After a series of trials in which a cake is cooked for thirty minutes at 150º, then 350º, then 500º, he writes:
In the first trial, it seems, the batter never reached a high enough temperature for these reactions to complete; in the third trial, there were too many! Thus we all know from experience that the results of our cooking depend strongly on the chosen temperature and time. Consider also the various ways to make a roast: we can cook the meat for a short time at high temperature, for a long time at low temperature, or choose some option in between. Why? Because the rate of chemical reactions is temperature dependent, and for every ~10°C increase in temperature, the reaction rate doubles.
Why is this important to understanding the rock record and petroleum geology? He continues:
This flexibility in cooking reflects a basic principle in petroleum geology called the Time-Temperature Index (TTI). The deposition of organic matter in sedimentary layers is much like pouring a raw cake batter into a pan. As those sediments are buried deeper, the temperature naturally increases, due to what’s called the geothermal gradient (heat flows from the Earth’s center to its surface, so temperature increases with depth). Once the temperature becomes high enough, those same chemical reactions that turned our batter into cake can also turn raw organic matter into a suite of energy-rich hydrocarbons (oil and gas). But the actual cooking time depends on the absolute temperature to which those molecules are exposed.

In other words, the Earth’s subsurface works like a giant oven—in fact, this terminology is frequently used by petroleum geologists. As with cooking in our homes, the end result depends on three factors: the original recipe, time, and temperature. When geologists search for oil/gas, they try to constrain those variables as best they can.
The upshot is that, due to the nature of the geothermal gradient, there simply has not been enough time to produce oil if the earth is only six thousand years old. Further, because geologists use this gradient to their advantage in examining the geological column, they have become very good at finding oil.

One of the grand daddies of modern young earth creationism, George McReady Price, received a letter from Harold Clark, another Seventh Day Adventist and fellow creationist, when Clark went out to visit the oil fields in Texas, in 1938. When he got there, Clark received a bit of a shock.  The letter read in part:
"The rocks do lie in a much more definite sequence than we have ever allowed. The statements made in your book, The New Geology, do not harmonize with the conditions in the field. All over the Midwest the rocks lie in great sheets extending over hundreds of miles, in regular order. Thousands of well cores prove this. In East Texas alone are 25,000 deep wells. Probably well over 100,000 wells in the Midwest give data that has been studied and correlated. The science has become a very exact one. Millions of dollars are spent in drilling, with the paleontological findings of the company geologists taken as the basis for the work. The sequence of the microscopic fossils in the strata is remarkably uniform. The same sequence is found in America, Europe, and anywhere that detailed studies have been made. This oil geology has opened up the depths of the earth in a way that we never dreamed of twenty years ago"
Astoundingly, people like Snelling never seemed to learn from the experience that Clark had.  In the last seventy-seven years, oil and gas explorers haven't adopted any form of young earth creationism in their efforts to find oil.  Instead, they have become better at it by using standard, well-understood modern geological methods and an understanding of the geological column that was well-known even in Clark's time.  To debate this on the part of Snelling is willful blindness. 

In some ways, this is analogous to the problem of what you would find in terms of consistency if the geological column were only 4500 years old and really did reflect the remnants of the world-wide flood.  If you could, the experiment might work like this: construct a tank that was a mile high, fill it with about 1000 feet of dirt (remember, the geological column did not exist at all before the flood but they had to be walking around on something), then pour water into the tank, simulating rain for 365 days.  At the end of that period, let the tank drain away (what the flood waters are said to have done).  You know what you will find at the end of that time?  You will find very hard mud at the bottom, medium hard mud in the middle and soupy mud at the top.  What you will not find is sedimentary rock of any kind.  You won't find sandstones, you won't find shales, you won't find chert and you won't find limestone.  Why?  You won't find them because it takes lots and lots of time for these kinds of rocks to form.

Young earth creationist studies of the Grand Canyon are interesting in this regard.  They fail to account for the fact that the walls of the canyon, had they been formed in a year's time, would not have been solid enough to stand up.  Being mostly mud, they would have collapsed, which is what you typically see in large-scale floods.  In fact, you see the relative hardness of rock on display in the canyon walls: the harder rock walls are more vertical, while the softer rock walls are more eroded.  If it were mud, there would be no canyon at all.

That digressed from the original point but these are just more examples of statements that young earth creationists make that are, on the face of it, absurd.  To paraphrase Conrad Hyers: you are asked to believe several impossible things before breakfast.