"Secular scientists say Earth has experienced many Ice Ages. But the evidence for multiple Ice Ages is very weak.
There is strong geological evidence for only the most recent of the supposed Ice Ages, which these scientists call the Last Glacial. They call the coldest part of this period the Last Glacial Maximum.
---The best scientific explanation is that the Genesis Flood caused this one and only Ice Age.
During the Flood, new seafloor formed very rapidly. Extruded magma heated the world’s oceans, greatly increasing evaporation from the sea surface.
This resulted in more precipitation, including large amounts of snowfall at high latitudes and on mountaintops.
Residual volcanism continued for centuries after the Flood, and the aerosols from the explosive eruptions reflected sunlight back into space, resulting in cooler summer temperatures.
The cooler summers prevented snow and ice from melting, allowing them to accumulate and form thick ice sheets.
As the oceans cooled and volcanic activity decreased, the Ice Age slowly came to an end."
ICR
And it came to pass in the six hundredth and first year, in the first month, the first day of the month, the waters were dried up from off the earth: and Noah removed the covering of the ark, and looked, and, behold, the face of the ground was dry. Genesis 8:13