What are gaps in the geologic record of rock layers called?

Unconformities Are Gaps in the Geological Record

The concept of an unconformity arises from two of the oldest principles of geology, first stated in 1669 by Nicholas Steno: The Law of Original Horizontality: Layers of sedimentary rock (strata) are originally laid down flat, parallel to the Earth’s surface.

What is a gap in the geologic record?

“Unconformities are just gaps in time within the rock record. This one’s called the Great Unconformity because it was thought to be a particularly large gap, maybe a global gap.”

What causes layers of rock to be missing?

Unconformities are simply gaps (missing data) in the rock record, these gaps could indicate a variety of processes. Such as: erosion, deformation, or changes in sea-level.

What is a gap in the geologic record where some rock layers have been lost because of erosion?

An unconformity is a gap in the geologic record. An unconformity shows where some rock layers have been lost because of erosion.