The Mountains and the Sand

Mountains
Mountians
One of the interesting studies available to students of geology is the way in which various structures on the surface of the Earth are formed. Where does sand come from and what message does it carry for us? Where we live in the Great Lakes area, there are massive amounts of sand. Areas to the south of us have lots of rocks, but relatively small amounts of sand compared to our area. This has not always been true, however, because deep underground in that area there are massive amounts of sandstone–the same sand we have around the Great Lakes but cemented together into rock.

Sand can be produced by the smashing of rocks. In places like Hawaii, there are beaches made up of black lava pounded into sand by the waves. There are even green and pink sand beaches made from rocks that contain colored minerals like olivine. Most sand, however, is made of quartz and is the by-product of the breakdown of volcanic rocks. Granite is made up of three basic minerals: orthoclase, hornblende, and quartz. There can be smaller amounts of other materials, but these are the dominant ones. These minerals have different hardness levels and are eroded at different rates. Orthoclase is quite easy to erode and has a pinkish color to it. This material erodes to become clay. The dark colored hornblende is also fairly easy to weather and erode. Quartz is extremely hard and durable. The result is that when weather and physical processes work on granite, the orthoclase and hornblende are carried away and what is left is quartz sand.

The massive amount of sand seen around the Great Lakes has come mainly from the granite that makes up the Canadian shield–the bedrock underlying much of North America. Any mountainous area will ultimately be reduced to nothing more than sand. One lesson that comes from mountains and sand is that nothing in this physical world is permanent. Jesus stated this eloquently when He said, “Do not store up for yourselves treasures on earth where moth and rust destroy, and where thieves break through and steal. But store up for yourselves treasures in heaven, where moth and rust do not destroy, and where thieves do not break in and steal. For where your treasure is, there your heart will be also” (Matthew 6:19, 20).

When I studied geology at Notre Dame University, we had a professor who would take us on a field trip to the cemetery. Headstones erected in the early 1800s already had disintegrated into piles of sand. One has to be reminded of James 4: 14, “What is your life? You are a mist that appears for a little while and then vanishes.”

Through all of this, however, there is the message of purpose and design by God. The mixture of sand, hornblende, and clay lead to soil. Life could not exist on a planet made of rock that could not be eroded. The waters that erode the granite sustain life, and the erosion process produces the topsoil that feeds us. The change of mountains into sand makes Earth a vibrant, living thing of beauty. So too, our lives can be beautiful if we allow God to mold and shape us. That is one of the key messages of 1 Corinthians 15:51-55. As the writer tells us about the most beautiful change of all:

“Listen, I tell you a mystery. We will not all sleep, but we will all be changed—in a flash, in the twinkling of an eye, at the last trumpet. For the trumpet will sound, the dead will all be raised imperishable, and we will be changed. For the perishable must be clothed with the imperishable, and the mortal with immortality. When the perishable has been clothed with the imperishable, and the mortal with immortality, then the saying that is written will come true: “Death has been swallowed up in victory.”
–John N. Clayton © 2017

How Long Does it Take to Make a Canyon?

Yellowstone Canyon
Yellowstone Canyon
Yellowstone National Park is one of our great American treasures. During several summers at Montana State University, we spent a lot of time wandering around this huge wilderness. Most people think of Old Faithful and the geyser basin when they think of Yellowstone, but the canyon and falls are some of Yellowstone’s most beautiful places.

What does it take to make a canyon like this, and what does this tell us about the history of the Earth? The answers to these questions are remarkably simple. You need something that is capable of cutting down through a material, and you need a material that can be cut. On planet Earth, the primary geologic cutting agent is water. When water is frozen, it gouges and cuts a wide U-shaped channel. This is called a glacier, and the shape of its canyon is easy to identify. In the liquid form, water makes a V-shaped channel like the Yellowstone Canyon. How long the channel is and how deep it is cut are determined by how much water flows, how long it flows, and how hard the rock is. In Yellowstone, most of the rock is geyserite, a soft yellow rock easily cut and eroded by water. This soft rock is produced by volcanic processes, and deep canyons can happen quickly when flooding occurs.

In other places like the Grand Canyon and most of the eastern part of the United States, the rock is much harder and takes much longer to erode. Yellowstone is a young topography caused by recent volcanism. The sedimentary rocks of the eastern United States and the Grand Canyon took a long time to deposit and a long time to erode. All of this points to God’s patience and timelessness. We should not try to lock God into a time-frame that makes God look small and trivial. Remember that “one day is with the Lord as a thousand years, and a thousand years as one day” (2 Peter 3:8).
–John N. Clayton © 2017