Adstratum is like a blanket that covers a bunch of rocks. The blanket is made up of tiny pieces of fabric that are all stuck together. The rocks are different sizes and shapes, and they all have different colors and textures. The blanket covers all the rocks, so you can't see them anymore. But if you lift up the blanket, you can see all the different rocks underneath.
In science, adstratum is a term used to describe the layer of rock or sediment that covers another layer of underlying rock. The word adstratum comes from the Latin words "ad" meaning "to" and "stratum" meaning "layer". So basically, adstratum is a layer that is stuck to another layer.
Geologists use adstratum to help them understand the history of the Earth. By studying the layers of rock and sediment, they can learn about the different environmental conditions that existed throughout time. For example, if they find a layer of sandstone on top of a layer of shale, they might conclude that there was once a river or beach in that area.
In summary, adstratum is like a blanket that covers a bunch of rocks, and it helps scientists learn about the history of the Earth by studying the layers of rock and sediment.