The type of conservative plate boundary you’re referring to is known as a transform boundary. At transform boundaries, two tectonic plates slide past one another horizontally. This lateral movement does not typically create significant landforms like mountains or ridges, which are often associated with convergent or divergent boundaries.
Instead, the primary geological feature of transform boundaries is the occurrence of faults. A well-known example of a transform boundary is the San Andreas Fault in California, where the Pacific Plate slides past the North American Plate. The movement along these boundaries can lead to earthquakes due to the buildup of stress along the fault line as the plates interact.