Petrified forest

In the Lykofi-Fylakto-Lefkymi area, quartz and opal-CT are the main silica polymorph within the wood. The hostrocks exhibit a zeolitlc "Iteralion suggesling reduced and sligh/ly alkaline .fluids jor the silicifica­ tion ofwood. A/ KassitereslSappes area lhe presence ofsilicified wood within kao­ linite±aluni/e al/ered tuffbreccias indica/es that slight acidic .fluids were involved in the silicification processes. In Limnos island the fOSSiliferous Portianou, Varos­ Roussopouli and Moudros-Roussopouli areas occur in the periphety of an eroded volcanic edifice exposed at Fakos peninsula. The Silicified wood occurs: (a) within weakly altered pyroclastics and (b) associated to several horizons o f sinters inter­ bedded within lhe pyroclastics. Tramformation ofamorphous silica to opal-CT and then to quartz is postulated based on XRD and SEM studies. The studied areas rep­ resent unique natural monuments, comparable to the petrifiedforest ofLesvos is­ land.

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