Question

Unlike other types of unconformities, disconformities are hard to recognize because all the layers are horizontal. How does a geologist know when he or she is looking at a disconformity?

Answer 1

Disconformities are difficult to recognize because they occur when horizontal layers of sedimentary rock are deposited in a shallow marine environment, followed by a period of erosion and then the deposition of new layers of sedimentary rock. The erosion removes some of the original rock, creating an age gap between the younger and older rocks. Although all the layers may appear horizontal, there are often clues left behind by the erosion process, such as river channels or soil development, that help geologists identify the disconformity.

Step-by-step explanation:

Disconformities are difficult to recognize because they occur when horizontal layers of sedimentary rock are deposited in a shallow marine environment, followed by a period of erosion and then the deposition of new layers of sedimentary rock. The erosion removes some of the original rock, creating an age gap between the younger and older rocks. Although all the layers may appear horizontal, there are often clues left behind by the erosion process, such as river channels or soil development, that help geologists identify the disconformity.