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Yengo National Park, Parr State Conservation Area and

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6<br />

these areas are of major significance to park management as they can result in<br />

pressure to provide additional <strong>and</strong> more sophisticated visitor facilities.<br />

Management of recreation within <strong>National</strong> <strong>Park</strong>s <strong>and</strong> Wildlife Service (NPWS)<br />

managed l<strong>and</strong>s is undertaken in accordance with the concept of a recreational<br />

opportunity spectrum (Clarke <strong>and</strong> Stankey 1979). This concept recognises that a<br />

variety of destinations <strong>and</strong> settings are required within a region to satisfy the variety<br />

of recreational needs. It also recognises that consideration should be given to the<br />

range <strong>and</strong> extent of opportunities provided in surrounding national parks, state<br />

conservation areas <strong>and</strong> other Crown l<strong>and</strong>s to ensure that the facilities <strong>and</strong><br />

opportunities within <strong>Yengo</strong> <strong>National</strong> <strong>Park</strong> <strong>and</strong> <strong>Parr</strong> <strong>State</strong> <strong>Conservation</strong> <strong>Area</strong><br />

complement these other areas.<br />

<strong>Yengo</strong> <strong>National</strong> <strong>Park</strong> lies in the local government areas of Cessnock, Hawkesbury<br />

<strong>and</strong> Singleton. <strong>Parr</strong> <strong>State</strong> <strong>Conservation</strong> <strong>Area</strong> lies in the Hawkesbury Council area.<br />

Finchley Aboriginal <strong>Area</strong> lies within Cessnock Council area.<br />

2.2 Significance of <strong>Yengo</strong> <strong>National</strong> <strong>Park</strong>, <strong>Parr</strong> <strong>State</strong> <strong>Conservation</strong> <strong>Area</strong> &<br />

Finchley Aboriginal <strong>Area</strong><br />

Geological Heritage<br />

<strong>Yengo</strong> <strong>National</strong> <strong>Park</strong>, <strong>Parr</strong> <strong>State</strong> <strong>Conservation</strong> <strong>Area</strong> <strong>and</strong> Finchley Aboriginal <strong>Area</strong> are<br />

on part of the Hornsby Plateau, a dissected s<strong>and</strong>stone plateau within the Sydney<br />

Basin which extends from the Blue Mountains to the Hunter Valley (Bembrick et<br />

al.1980). The western edge of this plateau is of considerable scientific <strong>and</strong><br />

educational value <strong>and</strong> includes some interesting alluvial features in the vicinity of<br />

Mellong Creek <strong>and</strong> the Garl<strong>and</strong> Valley which partially lie within the parks (Map 2).<br />

Exposed within the parks are Tertiary Volcanics, which are restricted in distribution<br />

with several small outcrop areas of both basaltic extrusions <strong>and</strong> diatremes (Bell et al,<br />

1993).<br />

Studies of the Macdonald River <strong>and</strong> Webbs Creek in the 1960s demonstrated that<br />

the river systems have experienced substantial change since European settlement.<br />

The Macdonald River is one of the best-documented examples of river response to<br />

alternating climatic cycles in Australia (Erskine, 1991).<br />

Natural Heritage<br />

<strong>Yengo</strong> <strong>National</strong> <strong>Park</strong>, <strong>Parr</strong> <strong>State</strong> <strong>Conservation</strong> <strong>Area</strong> <strong>and</strong> Finchley Aboriginal <strong>Area</strong><br />

partly provide a naturally vegetated east-west link between the coastal <strong>and</strong> subcoastal<br />

conservation areas in the Hawkesbury Valley / Broken Bay region <strong>and</strong> those<br />

of the Central Tablel<strong>and</strong>s.<br />

They are located in a ‘rainshadow’ <strong>and</strong> as a result receive lower rainfall than the<br />

higher tablel<strong>and</strong> areas to the west <strong>and</strong> the coastal ranges to the east. Lower<br />

rainfall, together with milder local climates <strong>and</strong> a few areas of good quality soils, has<br />

resulted in an area of high biodiversity including plant species <strong>and</strong> communities with<br />

affinities to the Coast, Tablel<strong>and</strong>s <strong>and</strong> Western Slopes.

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