👉 A tunnelled is a term used in the context of geology and archaeology to describe an area where layers are separated by a series of narrow, unbroken channels. These channels are often formed as a result of erosion or movement of sediments, and can be observed along streams, rivers, and other bodies of water. Tunnelled areas can vary widely in their size and shape, but they tend to have a characteristic outline that suggests the presence of ancient structures or features such as caves,
