A good walk out today along the coastal footpath and back. The cliffs at Cligga really are spectacular and the industrial heritage fascinating - just a shame that there aren't any interpretive boards in such a rich historical area. It really is the ideal place for a few. Looking back at the photos of which there are many, I'm dividing the walk into Part I : The Walk and Part II: The Cliffs....A decent 8 mile plus walk with surprisingly, 2,400 feet of ascent and descent - those dips add up!
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| Looking back over Perranporth Beach. |
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| The coastal path ...the light was very bright! |
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| A mining adit at the side of the path - it goes in quite a way but comes to a blank end. |
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The textbook photo of Greisen bordered veins.
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I quote from
Cligga Head - Greisen Bordered Veins: SOUTH WEST COAST PATH - a photo tour:
The Coast path passes through these two rocks. Cligga Head shows a fine example of a Sheeted Vein System with dark Greisen borders . The Granite was intruded about 290 million years ago. Cracks developed in the Granite , numerous parallel cracks at this location at Cligga Head. Hot fluid left after the Granite crystallised flowed through the cracks and broke down the feldspar ....., forming quartz and mica ...a process called Greisening. A second mineralisation in the Greisen deposited Crystals of Quartz , Cassiterite (Tin ore) and Wolframite (tungsten ore) .... A final mineralisation occured throughout the granite - the Kaolinisation of the feldspars with the outside of the feldspars that remain having a powdery coating.