structural:scholar_edition, information:classification, structural:reformatting
Geography, flora and fauna

Royal National Park contains a wide variety of terrain. Roughly, landscapes in the park vary from coastal cliffs broken by beaches and small inlets to an ancient high plateau broken by extensive and deep river valleys. The river valleys drain from south to north where they run into Port Hacking, the extensive but generally shallow harbor inlet which forms the northern border of the park. When looking across the park from east to west (or vice versa) the rugged folds of valley after valley fade into the distance.

The geology of the site consists mostly of the Triassic Hawkesbury Sandstone with some sections of the park having the more recent richer Wianamatta shale capping. Deep below the Hawkesbury sandstone belt lies Narrabeen Shales which is mixture of shale and sandstone under which and within which are untapped coal seams which run right through Sydney and are mined extensively where they come closer to the surface south of the National Park near Wollongong. Sections of recent alluvium fringes of estuarine watercourse where the endangered ecological communities; swamp oak woodlands and swamp mahogany woodlands grow still.