Burnt layer
A burnt layer or burned layer in archaeology is a stratum of earth that was formed primarily by the burning of objects or buildings.
The extent of the layer is irrelevant.
It can be the remains of a campfire as well as the remains of a burned down settlement.
Burnt layers are recorded in event stratigraphy, a sub-area of stratigraphy.
[1] This article relating to archaeology is a stub.
Very fine burnt layer, probably due to steppe fires