Mystery of Earth's Great Unconformity Resolved by Scientists
A long-standing geological mystery surrounding the Great Unconformity, a significant gap in Earth's geological record, has been resolved by scientists. This resolution was detailed in a study published in the Proceedings of the National Academy of Sciences.
The Great Unconformity is observed globally where sedimentary rock, approximately 500 million years old, rests directly atop ancient "basement" rock, which can be over 1.7 billion years old. The absent layers in this feature represent a time span ranging from several million to over a billion years.
According to the new study, the Great Unconformity is categorized as an iconic and enigmatic gap in Earth’s stratigraphic record.