Proposed Georegion
This map shows the
proposed GeoRegion stretching from the
Hawkesbury River to Barrenjoey Headland
in the North
and to Grant’s Castle,
Beacon Hill and Long Reef in the South.
All of Narrabeen Lagoon and its catchment
are within this proposed Georegion.
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Speakers from a group led by Friends of
Ku-ring-gai Environment will
tell us about the proposal to establish a GeoRegeion encompassing a wide area of interesting geology including
areas of the Northern Beaches.
The area of the Ku-ring-gai GeoRegion has at
its centre Ku-ring-gai Chase National Park,
and extends eastwards to the coast
encompassing the cliffs, beaches, and lagoons
from Long Reef to Barrenjoey,
westwards to Muogamarra Nature Reserve
and Eastern Berowra Valley National Park.
The area is rich in geoheritage sites
of both national and international
significance, supporting the
existing recognised values of the
area, specifically its biodiversity, natural
and cultural heritage.
Features of
international geological significance
include:
* The best exposed geological section of early
to mid-Triassic period (240 million years
ago) sedimentary rocks in the Sydney Basin.
*
Various rock units contain a diversity of
fossils that inform us of past environments
over nearly 50 million years.
*
The GeoRegion includes eight volcanic
diatremes (pipes) and associated dykes with
the Hornsby one having perhaps the best
exposed geological section in the world.
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Ursula Bonzol
Peter Mitchell
Angus Robinson |
