The Alpine Fault: Cake Friday goes on tour

By Mike

High Tea in the colonies

It is a truth universally acknowledged that geologists have cake on a Friday. Nobody knows why. Nobody knows when it started. Nobody knows who started it (except me, because it was me). But in the whole endless (6 month) history of cake Friday (Kuchenfreitag) it has NEVER taken place next to a major plate boundary. Today, today was that day.

Amidst torrentially light rain and wind we ventured along a never-before-travelled gravel track and bashed through Helen-sized shrubs (Helen is about 1.57m, apparently) to visit a huge (New Zealand huge, not Australia huge) cliff face exposing the boundary between the Pacific plate and the Indo-Australian plate, the Alpine Fault.

Where these ‘plates’; huge chunks of rock floating around on the outside of the earth, meet, they can collide into one another, slide past one another, or one can slip under the other. At least, this is what we learnt at school. In New Zealand it seems the geology, like pronunciation of vowel sounds, is not so simple. The locality (pointless geology word for place) we visited today shows the two plates slipping past one another, giving us huge earthquakes such as the tragic 2011 Christchurch disaster, but also colliding with one another leading to the Southern Alps popping up along the spine of South Island. To make matters more complicated, if we follow the same plate boundary either north or south we find plates slipping underneath one another (subduction zones) leading to volcanism and confusion. We saw only a tiny part of this large boundary, and each ate only a tiny part of a large cake, but seeing two worlds collide in front of us was an awesome experience.

Pacific on top, Australia on the bottom, mungey green stuff in the middle and geology hooligans in the front.

3 responses to “The Alpine Fault: Cake Friday goes on tour

  1. That appears to be a store-bought cake, I believe that contravenes the regulations of Cake Friday.

  2. Exactly what I was going to say Brendan, but on rereading of the cake friday rules, i found “Anyone attempting to buy a cake and disguise it as a home-made cake will be forever banished from cake friday”.
    Technically noone bothered to try and disguise it, so it’s legit. However I doubt they kept to rule 5 and gave a slice to the tea lady?

  3. Additionally, 1) “someone must bake a cake”… 3) “the baker is responsible for 100% of the cooking, cleaning, cutting and serving duties of the cake” – I’m quit certain the baker of that cake is unknown and was not responsible for any serving, cutting and cleaning. Talking about cake…can’t wait for our Wednesday arvo cake

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