Relying On Ignorance

Relying on Ignorance of Grand Canyon Formation
We often hear from young people who have been taught something in a Bible class or sermon or a religious publication or video that they know cannot be true. Many creationists and creationist groups lack training in the fields in which they claim to be experts, and they are relying on ignorance of their hearers. When smart young people hear something they know is incorrect, it gives them a reason to reject the church and perhaps reject God’s existence.

A classic example of this is shown in explanations of the Grand Canyon. Many writers try to explain away the formation of the Grand Canyon by saying that the Flood of Noah did it. They say the Flood formed the Canyon in a short time just a few thousand years ago. They claim that the Flood laid down the sediments, and when the water swept off the land, it carved the Grand Canyon.

As an Earth Science teacher in the public schools in South Bend, Indiana, I taught young people about petrology — the study of rocks. Knowing how rocks were formed enabled scientists to find resources such as copper, oil, marble, iron, and certain gems. We can now synthesize some of these materials by copying the methods by which they were formed in the Earth’s past. Relying on ignorance would not allow us to find or synthesize these materials.

We know that the deposition of materials and subsequent erosion by the Flood did not form the Grand Canyon. The dominant rock in the Grand Canyon is limestone. Children taking Earth Science courses learn that limestone is a chemical precipitate. Quiet waters produce it over a long time. Most of us know about rock candy in which a solution of sugar crystallizes to create the candy. Limestone produced by a similar process, as is halite, dolomite, and gypsum. These are chemically precipitated rocks, never deposited in moving water.

A recent headline in a creationist journal reads, “Rapid Limestone Deposits Match the Flood.” A young person told me that she didn’t want to hear anything else from the Church because the statements in the journal were clearly not true. She doubted anything the Church said was true as a result. She also pointed out other problems. The Canyon is not just one rock type. It has alternating layers of different materials produced by different climates and processes. There are desert-produced sandstones, conglomerates which are produced by running streams, salt deposits produced by evaporation, and lavas that flowed across the top of the rock layers below them and were not injected as sills.

There is a huge burden on us to know what we are talking about. We must be as accurate as we can in understanding what the evidence shows. The general public is ignorant of most of these things and will not call an error to our attention. However, young people today are better educated in scientific facts, and we must not be relying on ignorance to expect our explanations to go unchallenged.
–John N. Clayton © 2018

Earth’s Magnetic Reversals

Earth's Magnetic Reversals and Ancient Pottery
When I took my earth science students on our annual field trip to Lake Michigan, we did a “magnetism and history” exercise showing Earth’s magnetic reversals. We would go to the large sand dune known as “Old Baldy” (no, not named after me), cover a bar magnet with a white handkerchief, and stick it into the sand. The handkerchief would come out completely covered with little black needles of magnetite which is a magnetic iron oxide.

There was a nearby pool where the water was calm and where you could see the magnetic pieces with a pair of binoculars. They pretty much lined up in the same direction, and I showed the students that they were lined up with a compass needle. We would then dig down several feet into the sand to a layer of mud where the magnetite pieces pointed every which way. I would ask my students to tell me why that would be. Most of them said that the Earth must have lost its magnetic field at the time when that mud was deposited. I then told them if we dug down deeper we would find the magnetite pieces lined up again, but in the opposite direction. The point was obvious–the magnetic field of the Earth had flipped.

In reality, there are several other possible causes for the scrambled magnetite pieces, but the magnetic reversal did happen. In the mid-ocean ridge of the Atlantic, lava flows have trapped the magnetite. The process is called “thermoremanent magnetization.” Because the lava flows happened multiple times, they show a picture of the history of the Earth’s magnetic reversals. These lava flows have recorded over a dozen “flips” in the magnetic field of Earth.

Archaeologist Dr. Erez Ben-Yosef of Tel Aviv University has led studies of the history of magnetic changes on the Earth. Ancient pottery has tiny magnetic minerals that were aligned with the Earth’s magnetic field when the pottery was fired in the kiln. The stronger the magnetic field, the greater the alignment of the magnetic particles. From the late eighth to the second century B.C., ceramic jars bearing the impressions of royal stamps were manufactured in and around Jerusalem. Scientists have studied handles from 67 pieces of pottery, and they have found that the magnetic field of the Earth has gone through periodic rises and falls throughout history. The mapping of the magnetic fields gives a record of history, with small changes producing a pattern that improves dating techniques by a huge factor.

What causes the Earth’s magnetic field is still not completely understood, and the magnetic reversals are even more of a mystery. By measuring the magnetic particles in the pottery, scientists can date the pottery very accurately. This dating method can answer many questions about ancient kings and kingdoms including the major figures in the history of Israel.

For more on this go to https://www.haaretz.com/archaeology/1.771427
–John N. Clayton © 2018