onlap Definition
a geological term that describes the deposition of a younger layer of rock on top of an older layer, with the layers being parallel to each other.
Using onlap: Examples
Take a moment to familiarize yourself with how "onlap" can be used in various situations through the following examples!
Example
The onlap of the sandstone onto the shale indicates a change in the depositional environment.
Example
The onlap relationship between the two formations suggests that the sea level was rising during that time.
Summary: onlap in Brief
'Onlap' [ˈɒnlæp] is a geological term that refers to the deposition of a younger layer of rock on top of an older layer, with the layers being parallel to each other. It is used to describe the relationship between two formations and can indicate changes in the depositional environment or sea level.
