In geology, unconformities represent missing time. Typically applied to surfaces in the rock record that represent erosion and/or non-deposition, and across which there is a significant leap in time. Unconformities are formed through a variety of processes, but the lack of a rock record should not be interpreted as a lack of geologic information. Indeed, unconformities speak to important processes, and can be key markers and indicators.
This post serves as the great Apparent Dip unconformity. Erosion and non-deposition are great analogs for my missing time, but I hope to start recording again.