The term “Ice Age” probably brings to mind an ill-tempered mammoth, a fast-talking sloth, a sarcastic saber-toothed “tiger,” and a bunch of other prehistoric characters from the famous franchise of the same name. Amid the zany events of the franchise’s storyline, it can be easy to forget that the Ice Age was a real event in our planet’s history that forever reshaped the earth. Figuring out how and when the deep freeze took over the earth, what effect it had on plant and animal life, and how it came to an end has taken old-earth and young-earth advocates alike on an incredible journey of discovery into the planet’s frigid past.
Was There REALLY An Ice Age?
“Well, why not call it The Big Chill? Or the Nippy Era? I’m just saying, how do we know it’s an ice age?”Ice Age, 2002
“Because of all the ice!”
Contrary to popular belief, the Ice Age was more than just a time when the earth was covered in loads of ice and snow. Geologists use this term to refer to a period of time when large portions of the world are covered in ice sheets . Technically, we are in an ice age today because we have ice sheets covering much of Greenland and Antarctica. Old-earth geologists believe that there have been five major ice ages in earth’s past. However, the term “ice age” is generally used in association with what is known as the Pleistocene, or Quaternary, Ice Age. To differentiate the two, we will use the capitalized term, Ice Age, to refer to the events pertaining to the Pleistocene specifically.
By looking at the evidence modern glaciers leave behind when they move to and fro across the landscape, glaciologists (scientists who study glaciers) can determine the extent of Ice Age glaciers. A few indicators of glacial activity are listed below:
Moraines are piles of unconsolidated (loose) sediment that is shoved out of the way as a glacier advances forward; moraines pushed forward are called terminal moraines, while moraines formed along the sides of a glacier are called lateral moraines.
Glacial Striations are the smoothed and etched surface of a rock that has been overrun by heavy glaciers.
Image Credit: By Arild Vågen – Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=21243020
Erratic boulders are rocks that were moved along by advancing glaciers and deposited as the glaciers melted and receded, often ending up many miles from their place of origin; they can range in size from pebbles to very large rocks, like Bubble Rock in Acadia National Park in Maine.
Image Credit: By Brian W. Schaller – Own work, FAL, https://commons.wikimedia.org/w/index.php?curid=30542028
By studying these and other clues, geologists and glaciologists have determined that the Quaternary ice sheets covered about 30% of the earth’s total land surface, mostly in North America, northern Eurasia, and Antarctica. At its maximum extent, the North American ice sheets covered two-thirds of the continent, including most of Canada and extending as far south as the Midwest in some places.
When Did the Ice Age Happen?
Old-earth geologists believe the Quaternary Ice Age was a recent phenomenon in geologic history (relatively speaking), starting about two and a half million years ago and ending as few as 11,000 years ago. But this date range was arrived at based upon old-earth assumptions . Assuming Genesis 1-11 in the Bible as an eyewitness account of the planet’s past, the world itself would only be a few thousand years old . How might we determine when the Ice Age occurred in this biblical timeline?
Geologic formations associated with the Ice Age tend to be localized and preserved in the topmost portions of the geologic record . This contrasts to the thick and widespread sediment packages most young-earth geologists associate with the Flood and are found further down in the geologic record. That would indicate that the Ice Age occurred sometime after the Flood.
The paleontological record of the Ice Age is also of relevance. Among the mammoths and saber-toothed cats commonly associated with this period, we also find the remains of animals and plants that are still alive today, like cottontail rabbits, coyotes, cougar, white-tailed deer, and pronghorn “antelope,” often living in the exact same places they do today . These species are not found in Flood or pre-Flood deposits, meaning that they likely did not exist before the Flood. They must be the post-Flood descendants of the created kinds of animals aboard the Ark with Noah and his family. As such, their presence in Pleistocene deposits is another line of evidence that the Ice Age occurred after the Flood .
Finally, the archaeological record of humans can also help us determine the Ice Age’s place in biblical history. There may  or may not  have been some overlap between the end of the Ice Age and the building of post-Flood cities. However, we do know that the Ice Age was already well underway by the time complex civilizations arose (with the possible exception of Babel ) because they are absent from Ice Age geologic deposits. The first mentioned recognizable and settled civilizations in the Bible are found in the account of Abraham. He comes across several powerful nations and city-states, such as Egypt (Genesis 15:19-21), in his journeys through the ancient near east. These civilizations are described as prominent and well-established by Abraham’s time, and they post-date any major effect the Ice Age had on these regions. This would indicate that the Ice Age had at least begun, if not already ended, by the time of Abraham.
With this information, we can deduce that the Ice Age would have happened within the centuries to a thousand years or so between the Flood and the time of Abraham.
What About the ‘Ancient’ Ice Ages?
As mentioned above, old-earth geologists believe in not one, but five major ice ages in the earth’s past. How can they be understood from a young-earth perspective?
In general, it is increasingly more difficult to study geologic events the deeper into geologic history one goes. The evidence is even contradictory in many cases. For example, the Cryogenian ice age that is supposed to have occurred between 720 and 635 million years ago is claimed to have covered the entire earth in ice sheets, from the poles to the Equator. This idea has been called the Snowball Earth hypothesis. However, there has been research that suggests these “glacial” deposits were associated with sedimentary rocks formed in warm climates  and fossil sponges . This indicates the presence of warm, liquid water.
Young-earth research regarding ‘ancient’ ice ages is still in its infancy, but it has been suggested that the ‘evidence’ in support of the Snowball Earth hypothesis is more consistent with that of underwater landslides during Creation Week and/or the Flood [12,13].
How Did the Ice Age Occur?
Most old-earth scientists use the Milankovitch Cycle to explain the occurrence of ice ages. Accordingly, this model argues that the earth’s distance from the sun varies, circling nearer or farther from the sun for thousands of years at a time. When farther from the sun, the earth’s average temperature is decreased, allowing snow and ice to accumulate on the continents. This scenario is problematic, however, because while a colder, drier world climate would be able to preserve an already-existing ice sheet, it could not generate ice sheets. Such climate conditions would decrease the amount of evaporation, and therefore precipitation (snowfall), that is needed for ice sheets to form.
The struggles old-earth scientists face to create an ice age has given their young-earth colleagues a chance to develop their own model. By far most of the work in this field has been done by Dr. Michael Oard . He points out that the tectonic and volcanic activity during the Flood would have left the ocean water much warmer than it is today. This led to increased evaporation, which allowed great quantities of precipitation on land. In some places, this precipitation occurred in the form of rain. In the high latitudes and mountain regions, however, it fell as snow. Over the decades and centuries that followed, the snow piled up into massive sheets of ice and covered large plots of land, lowering sea levels worldwide in response. Subsequent research by Dr. Steve Gollmer has shown that volcanic activity during and after the Flood may have pumped aerosols, dust, and other debris into the atmosphere, blocking out much of the sun’s heat and cooling the continents .
Dr. Oard’s Ice Age model suggests that the Ice Age reached glacial maximum (farthest extent of glaciers) within 200 to 1,700 years after the Flood.
How was the Ice Age World Different Than Today?
Contrary to popular belief, the entire world was not covered in ice sheets and frigid conditions during the Ice Age. Nevertheless, the Ice Age and the conditions that caused it were still worldwide in their influence.
So much of the earth’s water was frozen on land that sea levels worldwide were hundreds of feet lower than they are today. This exposed vast stretches of shallow seafloor, enlarging landmasses and even forming land bridges in between continents. This allowed animals and plants to freely spread across many regions of the world that are separated by ocean in modern times. Beringia is the name given to a land bridge that formed between Siberia and Alaska. Sundaland is another example, connecting the islands of Sumatra, Borneo, and Java to mainland Asia.
Another side effect of the warm post-Flood oceans was that sea ice was unable to form over the Arctic Ocean. Moist, warm air rising from the ocean would have flowed over land, keeping lowland areas from freezing over . This provided the necessary conditions for vast and lush grassy plains in the high latitudes that were somewhat like today’s African Serengeti, and just as rich in biodiversity . Known as the Mammoth Steppe, this unique habitat stretched across much of northern Eurasia, Beringia, Alaska, and even some of Canada.
In the late Ice Age, as well as sometime afterward, the Sahara received copious amounts of precipitation as well, turning it into a “wet desert” home for animals and plants that are found much farther south today . You may be familiar with how tall mountain ranges can restrain precipitation-producing weather systems, forming rain belts. The Ice Age glaciers acted in a similar way. Ice sheets in North America, for example, blocked moisture-laden jet streams coming from the Pacific Ocean and sent them southward. As with the Sahara, the American southwest was also turned into a wet desert with many large lakes and plentiful vegetation .
What Lived During the Ice Age?
As mentioned above, many of the animals alive during the Ice Age were the same as those still alive today. Thanks to the moist climate of this time, many animals had much broader distributions than they do today. Tapirs and capybaras, for example, flourished throughout the southern United States, while their present day counterparts are only found in Central and South America [20,21].
But there were also animals unique to this period of time called the Pleistocene megafauna. They were large, often many times larger than their closest modern relatives. Great herds of woolly mammoths, bison, and woolly rhinoceros roamed the Mammoth Steppe in droves alongside cave hyenas and steppe lions . In the Americas, saber-toothed cats, short-faced bears, and dire wolves were among the top predators south of the ice sheets. Glyptodonts (car-sized armadillos), ground sloths, and elephant-like creatures called gomphotheres flourished in these parts as well. Australia’s Pleistocene megafauna was particularly unique. Among them was the giant “wombat” Diprotodon, giant kangaroos, and an enormous sister species of the Komodo dragon called Megalania.
What Were People Doing During the Ice Age?
Much like the animals, post-Flood humans also spread out from the Ark and traversed across the planet . During the Ice Age, most humans were nomadic hunter-gatherers, living in tents or caves. They boasted a wide arsenal of tools made from bone, wood, ivory, antler, and of course stone. Among them were spears and axes used for taking down large game, hammerstones for cracking hard seeds, bones, and nuts, scrapers for preparing animal hides, and awls for making clothing.
Such “primitive” technology may seem out of place; after all, pre-Flood man had already been engaged in agriculture (Genesis 4:2&3) and metallurgy (Genesis 4:21), and had even constructed cities (Genesis 4:17). But we must remember that humans of the Ice Age were living in the aftermath of a technological bottleneck: the Flood! What Noah and his family brought with them in the Ark would have only represented a fraction of the technological prowess that once existed. In addition, it was more practical to adopt the “primitive” hunter-gatherer lifestyle in a world ravaged by unstable environmental conditions in the Flood’s wake.
There were several people groups alive during the Ice Age, all of which descended from Noah and his family . Some were more like us than others. Neanderthals lived throughout Eurasia and northern Africa. With a stocky body build and large noses that warmed the air before breathing it in, they were well-adapted to thrive in Ice Age conditions. Recent research indicates that Homo naledi was another example of early post-Flood human that may have disposed of their dead in caves. “Hobbits,” Homo floresiensis, were the offspring of post-Flood humans that may have built boats or rafts in order to navigate the islands off the coast of southeast Asia.
For one reason or another, most varieties of humans disappeared sometime before the end of the Ice Age. Only the lineage that leads to us, Homo sapiens, remains. We dispersed widely, not just across Eurasia and Africa, but also Australia, the Americas, and even beyond our planet, having briefly visited the moon in 1969.
End of the Ice Age
Just as the mechanisms for the worldwide Flood brought on the Ice Age, their cessation also brought it to an end. When the ocean sufficiently cooled, the ice sheets were no longer supplied with copious amounts of snow . Volcanic eruptions became smaller and less frequent with time , meaning more of the sun’s heat was able to enter the earth’s atmosphere. Drying conditions in other parts of the world kicked up severe dust storms that buried animals alive, killing them through asphyxiation .
Another interesting thing that happened as the Ice Age came to a close is the disappearance of most Pleistocene megafauna worldwide. Paleontologists do not yet agree on why they became extinct and have proposed three theories: overkill, overchill, and overill. Advocates of the overkill theory think humans were to blame, much as we are still causing animals to go extinct today. Those who accept the overchill theory think the end of the megafauna was the result of the climate changes and natural disasters brought on by the Ice Age’s climax. A handful of researchers accept the overill theory, suggesting that the Pleistocene megafauna were done away with by a widespread pandemic. Another possibility is that there was no one cause for the extinction of the Pleistocene megafauna, but a unique combination of the aforementioned theories.
The Ice Age was a unique and dynamic time in our planet’s history. In addition, it has given young-earth creationists a perfect launching point for research in the hopes of better understanding it. We have learned how the Noahic Flood may have provided the necessary starting conditions an ice age, and how the cessation of these mechanisms also brought about its meltdown. We learned what effect the Ice Age had on the world, and how it enabled wildlife to recolonize the world after the Flood. We have even learned how humans and other animals responded to the major environmental changes stirred up by the Ice Age world.
But as always seems to be the case with science, every answer we get about the Ice Age brings about more unanswered questions. We need a better understanding of how long the Ice Age lasted in the young-earth timescale, especially how long it took the glaciers to advance and recede. Many of the animal kinds that lived during the Ice Age adapted in substantial ways as they adapted to changing climate conditions of the time. Whatever the biological mechanisms were that brought about these changes, they must have operated much more quickly than the slow and gradual mechanisms we observe at work today. What were these mechanisms? We also want to know why almost all of Noah’s descendants (except Homo sapiens) disappeared, and why mammoths, megalania, and other Pleistocene megafauna became extinct. Such questions can only be answered by young curious minds eager to explore the mysteries of the Ice Age! Care to join the quest?
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The views expressed in this article reflect those of the author.