Unconformity
A gap in an area's geologic history is called an unconformity. This represents a period of time where rock layers are missing due to erosion or non-deposition. Unconformities can help geologists understand the timing and duration of geological events.
Erosion of already deposited layers or a time span of non-deposition.
unconformities show a gap in the geologic records
The geologic time scale.
A rock layer can cause a gap in the geologic record through erosion, where the layer is removed by natural processes. Alternatively, non-deposition can also create a gap when no new sediments are deposited, leaving a break in the rock layers.
Geologic column is an ordered arrangement of rock layers that is based on the relative age of the rocks. Geologic time is the time IN the geologic column.
eon>era>period
The current geologic age is referred to as the Holocene epoch.
a gap in the geologic record that shows where rock layers have been lost do to erosion
an era is a very long span of geologic time
An unconformity causes a gap in the geologic record, representing a period of erosion or non-deposition that results in missing layers of rock. This gap can be caused by tectonic forces, sea level changes, or other geological events that interrupt the deposition or preserve of sedimentary layers.
Eras are subdivisions of larger units of geologic time called eons.