Find incorrect statement w.r.t. primary succession.

Primary succession is a process that starts in an area where no living organisms are there – these could be areas where no living organisms ever existed, say bare rock. Examples of areas where primary succession occurs are newly cooled lava, bare rock, newly created pond or reservoir. The establishment of a new biotic community is generally slow. Before a biotic community of diverse organisms can become established, there must be soil. Depending mostly on the climate, it takes natural processes several hundred to several thousand years to produce fertile soil on bare rock.