What is a slickenslides?

Answer 1

Well, there are no such things as 'slickenslides', but there are 'slickensides'. A slickenside is a polished, striated rock surface caused by one rock mass sliding over another in a fault plane.

Answer 2

A slickenslide is a polished and striated rock surface that forms along a fault plane due to the friction and movement of rocks during an earthquake. These features can help geologists determine the direction and amount of movement that occurred along the fault.