millions of years the elements and the global forces have
shaped and reshaped the Blue Mountains. Through geological
time the basement rocks of the mountains were submerged
by marine foreland basins overgrown by peaty bogs, kilometres
thick in some places, then buried underneath deep deposits
of sand brought by huge braided river systems.
volcanic activity can be observed in the form of basalt
caps on the higher peaks (such as Mt Banks and Mt Wilson).
Eroded basins have formed on the diatremes where stream
superheated by the earths core once blasted its way through
to the surface.
continental drift forced the crumpling of the Australian
coastline, pushing up the mountains that are the Great
recently plutons of granite, swelling up from the molten
core of the earth lifted and tilted the Blue Mountains
, forcing slow running streams to flow more quickly.
swift flow of water has cut deeply into the sandstones,
carving great valleys canyons and gorges. The depths
the valleys reveal the granites under the quartzite and
conglomerate rocks twisted and folded by heat and pressure.
vertical cliffs , etched and cracked by fault lines surround
the valleys. The deep valleys and dissected cliff-lines
are the core of the Blue Mountains environment and provide
the basis for the astounding diversity of plant and animal
species living in the area.
Parks & Wildlife Service, National Park Shop
and Information, Heritage
Centre, End of Govetts Leap Road, Blackheath. Phone: +61 (02) 4787 8877.
9am to 4.15pm every day except Christmas Day