Greenland Archives

Radical Sea Level Changes — Thornton Reef Quarry with Interstate 80/294 crossing it

Scientific American magazine reported that if the entire Greenland ice sheet melted, global sea levels would rise by 24 feet. The article clarified by saying, “The sheet won’t melt all at once, of course…” What articles like this fail to convey is that Earth has experienced radical sea level changes throughout both geologic and human history.

Geologic history shows marine deposits in places you wouldn’t expect. When I taught earth science, I took my classes to Thornton Reef on the south edge of Chicago, Illinois. I am told that the gravel pit now occupying the reef is the largest in the United States. On one trip there, a student found the tube of a cephalopod, an ancient giant octopus-like creature. Clam shells, snail shells, and brachiopods filled buckets that my students took home. This reef is similar to modern ocean reefs, except it winds through the south side of Chicago with a major interstate highway running right through it.

Other examples of historic radical sea level changes are abundant. Oolitic limestone in southern Indiana consists of tiny ocean creatures called oolites. The limestone in the Grand Canyon contains marine deposits. On the other end of the scale, canyons are cut into continental shelves along the U.S. East Coast of the United States. Those canyons were cut when the shelf was out of water. Scuba divers have reported signs of ancient human-made structures and fire pits in those canyons.

Was the Red Sea at the same level when Moses led the Israelites across? Are people searching for Egyptian armor and chariot remains in the wrong spots? The “Sea of Reeds” was likely dry land at that time, so efforts there are probably doomed to fail. We still have much to learn about climate history, radical sea level changes, and ancient peoples. As our technology improves, discoveries will increase, and we look forward to uncovering more evidence of Earth’s history.

Reference: “Greenland’s Frozen Secret” in the July/August 2025 issue of Scientific American, pages 26-36.

John Cooper explores dry land evidence for the credibility of the biblical account in a series of videos produced by Does God Exist?

Sunspots and Earth’s Climate Yesterday we mentioned sunspots and their potential effect on our planet. Sunspots are areas where the local magnetic field is thousands of times stronger than on the rest of the Sun’s surface. We know that sunspots adversely affect electric grids and orbiting satellites. There are unanswered questions about sunspots and Earth’s climate.

When sunspots occur, the stronger magnetic field constricts the hot plasma of the Sun, creating a somewhat cooler area. Why is it, then, that historically in times when sunspots are rare, Earth’s climate has become colder? Are sunspots the cause, or was it just a coincidence?

Scientists refer to the period from 1645 until 1715 as the Maunder Minimum, because sunspot activity was minimal. That also corresponds with the coldest years of what is sometimes called the Little Ice Age. It was not a true ice age, but the Northern Hemisphere experienced winters that were longer and colder than usual. European rivers froze, Vikings abandoned Greenland, and farmers in Norway lost farmland to advancing glaciers.

So the unanswered question concerns sunspots and Earth’s climate. Does the lack of sunspots cause lowered temperatures on Earth, or have past trends been coincidental? We don’t know, and science cannot find an explanation. Many scientists are predicting reduced sunspot activity in the coming years. Perhaps God is providing a way to counter-balance present concerns about global warming, but only God knows what the future holds.

It is interesting that the years 1643 to 1715 also mark the reign of Louis XIV of France, known as “Louis the Great.” He was also known as “the Sun King” because he chose the Sun as his symbol, and his subjects (or perhaps Louis himself) compared him to Apollo, the ancient Greek sun god. Louis the Great reigned for 72 years during the Maunder Minimum. But even the so-called Sun King could not control the Sun. Only the Creator of the Sun, Moon, and stars can do that, and only He knows if there is a connection between sunspots and Earth’s climate.
— Roland Earnst 2019