For more than a century, geologists have been perplexed by the Earth’s past and future, and they have even coined the term “The Great Unconformity” to refer to the fact that large chunks of time have been missing from the Earth’s geological record in places. As described in a previously published research, this is the result of abrupt glacial erosion during the period known as Snowball Earth, during which the Earth was completely covered in ice.
In sedimentary rock, an unconformity occurs when the older rocks wither away before they are covered by the younger ones, resulting in a rapid rupturing. For example, the Grand Canyon is a fantastic example, and it has been discovered to reproduce in other rocks of a comparable age as well. A global average of 3-5 kilometres of rock was destroyed as a result of glacial erosion, resulting in the omission of the rocks from historical records. According to Dr. Brenhin Keller of the Berkeley Geochronology Center, the Earth does not have the Great Unconformity everywhere, and as a result, the location where the missing patch is present differs from one location to the other. Using accurate digitization, it has been shown that the Earth has stored 0.2 cubic kilometres of sedimentary rock every year since the beginning of time. But, all of a sudden, there was a rise to approximately 1 km3 to date, and geologists believe that approximately 1 billion cubic kilometres of Cambrian material has gone missing.
Although the Phanerozoic era is considered to be the time when sedimentation rose, whether or not erosion was greater before to this period is still up for debate. The rocks contain crystals of hafnium and oxygen isotopes that were deposited at low temperatures and are currently being eroded away from the aged rocks. The asteroid collision and phenomenal peak in erosion rates, as well as the craters that have been there for 700 million years, might be cleaned away. In comparison to the glaciations that occurred 717 and 580 million years ago, the modern chills are insignificant in comparison. The equator also possesses a large amount of ice, and it appears that these glaciers drove away the sedimentary rocks into the sea, resulting in the formation of the Great Unconformity. All of the mysterious events surrounding Snowball Earth, including the erosion and missing slabs, may be connected in some way, and they may be responsible for the origin of sophisticated life forms. The Earth was covered for ages by a chilling event known as the Little Ice Age approximately 700 years ago, and this is currently being investigated as remains of this event discovered in the Pacific Ocean are now surfacing and mingling with the warm waters. Jake Gebbie and his colleagues from Harvard University are currently examining the ocean since the change in the temperature of the water is expected to have an influence on the surface of the land.