Pattern and texture in hornblende schist

Polurrian Rocks 40 – Pattern and texture in metamorphic hornblende schist belonging to the Traboe Formation (part of the Lizard Complex) from south of the Lizard Boundary Fault at Polurrian Cove in Cornwall. There is an interesting patch of smaller rock fragments in a light matrix.

8 Replies to “Polurrian Rocks 40”

  1. This was one of my favourite images so far. The patterns were all within the rock itself, with a diagonal band showing smaller brecciated pieces, indicating significant changes to it in the deep past. The smooth wave-worn surface of the outcrop was speckled by rain drops.

  2. The colors, textures, and patterns in this series are endlessly fascinating! I am always left baffled and in awe at how specific rocks like these were formed…the older I get the more I have come to appreciate the profound mystery of it all as much as a detailed analysis of it. A very nice series of photographs, Jessica.

  3. Thank you, Mic. I am pleased you like them. I spend a lot of time trying to find out about the rocks I photograph, It seems to me that geology is a fascinating but very difficult subject to get to grips with – but I gradually acquire greater understanding.

  4. Yes, I appreciate your descriptions and often go off on google searches for more information based on them. I have the same view of geology…fascinating but difficult to fully grasp. I built a seismograph several years ago and have had a little better success with understanding that aspect of geoscience.

  5. Building a seismograph sounds like a challenging project – but one for which you have an appropriate academic background. It is good to keep trying out new things, keeping active and curious, learning new things. I often think that understanding rocks requires such a different and diverse vocabulary that it is like learning a new language.

  6. The vocabulary and naming conventions are a big part of both the difficulty and the fascination with geology aren’t they? Some of the names are so colorful and exotic! But it is difficult for me, but equally fascinating, to keep track of the sedimentation, uplift, folding, weathering, subduction, rifting, melting, etc. that takes place over hundreds of millions of years as the continents move around and crash into each other that make the rocks underfoot look the way they do. So like you, I pursue that lifelong learning even though I may never fully grasp it.

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