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| The geology of Ano Liosia area is very interesting. | ||
| The city is built on a small shink. It is surrounded by the mountains Parnitha and Aigaleo and the only way out | ||
| is at ''Sidera'' post were the Efpyrides ravine is passing underground. | ||
| These mountains are limestone mountains over Triadic slit and Jurassic limestone. | ||
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| Below you can see the city of Ano Liosia between the two mountains. | ||
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