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Hong Kong Geology Guide Book Geotechnical Engineering Office ...

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there is the Ngong Ping 360 Cable Car from Tung Chung.<br />

Nei Lak Shan reaches an elevation of 751 m but, because the bus terminal at the Po<br />

Lin Monastery is at an elevation of c. 460 m, the summit of Nei Lak Shan is only a<br />

relatively short 300 m climb. There are two possible routes to the summit. One,<br />

slightly shorter, route is along the footpath from behind Po Lin Monastery. The initial<br />

70-80 metres of the path is overgrown, making walking a little difficult. A second,<br />

slightly longer but gentler and more popular, route follows the path along the<br />

southeast ridge of Nei Lak Shan.<br />

Outline of the <strong>Geology</strong><br />

The summits around Ngong Ping are underlain by porphyritic rhyolite lava, welded<br />

and unwelded rhyolitic tuff, and tuffaceous sedimentary rocks of the Lantau Volcanic<br />

Group (Sewell et al., 2000). Two main types of tuff within the Group are represented<br />

on Nei Lak Shan: 1) slightly-welded tuffs with parallel flow bands. These rocks,<br />

Boulders of tuff with parallel flow-bands,<br />

mid-slopes of Nei Lak Shan<br />

Feldspar crystal developed by slow cooling<br />

in slightly-welded tuff<br />

81<br />

Close-up of tuff with parallel flow-bands<br />

Weathered surface of slightly-welded<br />

coarse ash crystal tuff

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