The Giant’s Causeway – The Columnar Jointing Project

Must find the rest of the photos!!!


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Mount Beerwah – The Columnar Jointing Project

Although not the first on my list of columnar jointing locations, it was however, the most recent. After a rained out weekend (14/05/2017), Elisha and I could not climb the mountain as there had been massive rockfalls and mud slides on the route up, which was a bit of a shame, we’ll have to visit again soon!

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Mount Beerwah, SE QLD, Australia. Photo taken at the car park at the base of the mountain.

So, Mount Beerwah is one of ten volcanic plugs that dot the Glass House Mountains. It formed around 26 million years ago when southeast Queensland was over a hotspot that caused prolonged volcanic activity throughout that Glass House Mountain Region. The regional geology in the area prior to the volcanic activity is sandstone, with these volcanic plugs intruding into the sandstone. Over time, erosion has worn away the sandstone leaving the harder igneous rocks exposed. The composition of the Mount Beerwah columnar jointing is apparently, according to signage in the area, Trachyte. However, without a hand sample I couldn’t say for sure.

The Columnar Jointing Project

So, the reason I’ve resurrected this blog is because I am currently undergoing a bit project. The project, as the title suggests, is to visit as many columnar jointed locations as possible and write about them! This might sound like a tall order, but I’ve already started!

  • Giants Causeway – Northern Ireland
  • Fingal Head – QLD, Australia
  • Kilt Rock – Skye, Scotland
  • Mount Beerwah – QLD, Australia

These locations have already been visited, with another trip planned to Raoul Point in Tasmania in December, I’m well on the way. However, it does appear that there are multiple locations all over the world and even on Mars with columnar jointed volcanics. I guess the thing I have to think about now is ‘do I only visit the spectacular sites?’as some sites may be more aesthetically pleasing, or ‘does composition matter?’ ¬†as some columnar jointed sites basic and a few others are felsic? The big one though is ‘how accessible are some of these sites?’, I don’t want to be walking through a warzone or minefield or something like that!

A quick google search has found around 150 sites on Earth and 1 on Mars!

I think I need to set myself some ground rules!