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January 15, 2018

Monday Geology Picture: Constantia Granite

For this week’s post, here’s a picture that I took yesterday during a Sunday afternoon hike with my family. We went for an easy stroll, baby and all, along the Alphen Trail in the Constantia region of Cape Town here in South Africa. My son is 3 months old now, and we’re just starting to go on some easy hikes as a family. The Alphen Trail is more of a …

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January 8, 2018

Monday Geology Picture: Vintage Field Vehicle

I really enjoy looking at old geology textbooks, which often have incredible photos and drawings in them. For example, check out the above photo from an old geology textbook that I picked up at a secondhand bookshop. Look at that vintage field vehicle! Does anyone know what kind of car that is? The information in old geology textbooks (especially ones published before plate tectonics was understood) is often incorrect, but …

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January 1, 2018

Monday Geology Picture: Lion’s Head Inselberg

Happy New Year! I’m going to do my best to blog more regularly in 2018, starting with this first “Monday Geology Picture” post. This week I’m sharing a view of Lion’s Head (the distinctive mountain in the background of the picture), an inselberg here in Cape Town, South Africa, the city where I live. I took this picture a few weeks ago during a walk with my family along Sea Point …

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December 4, 2017

Monday Geology Picture: Garnet Biotite Tabletop

Since re-starting my blogging, I missed a few weeks of weekly pictures. My apologies! Life with a newborn does not leave much extra time, I’m afraid! I’ll try to be more consistent with my blogging in December and going into the new year. However, I have a great picture for today: a close-up snap of a lovely stone tabletop that I recently saw, believe it or not, at a McDonald’s …

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November 6, 2017

Monday Geology Picture: Inselberg View

For this week’s picture, here’s a lovely view of an inselberg and the Twelve Apostles section of Table Mountain here in Cape Town, South Africa. Note the layers of sedimentary rocks of which the mountain is made. In the foreground, you can see some rocks of the Cape Granite Suite, which is about 550 million years old.

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October 30, 2017

Monday Geology Picture: Pretty Pahoehoe

For this week’s picture, here’s another lovely shot of pahoehoe basalt that I took during a March 2017 vacation to Réunion Island. I previously shared a picture of some Réunion pahoehoe here.

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October 23, 2017

Monday Geology Picture: Basaltic Weathering

For this week’s picture, here’s an image of a relatively young basaltic surface weathering. You can see yellow-green olivine crystals weathering out of the dark matrix. Olivine is one of the first minerals to weather out of rocks, so you can tell that these basalts must be young. Older basalts generally don’t contain fresh olivine, at least not any crystals that you can easily identify with the naked eye. I …

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October 16, 2017

Monday Geology Picture: Dinosaur Mobile

Since my baby boy is likely to arrive this week, I thought that I would share a picture from our dinosaur-themed nursery for this week’s picture. This picture shows the lovely dinosaur mobile that we’ve hung over the crib. This mobile was hand-made by women in South Africa (providing key local employment). I ordered it from a South African website. However, it is also available on Etsy for international customers. …

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October 9, 2017

Monday Geology Picture: Sani Pass, Lesotho

For this week’s geology picture, here’s a shot that I took last year when I visited Sani Pass, which is one of the ways to enter Lesotho. The country of Lesotho is located high up in basaltic mountains, entirely above 1,000 m. You can see basaltic cliffs on either side of this picture. The basalts erupted approximately 180 million years ago and are part of the Karoo Large Igneous Province. I’ll …

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October 2, 2017

Monday Geology Picture: Posing with Pahoehoe

First of all, for this week’s “Monday Geology Picture” enjoy this fantastic picture of me sitting on some pahoehoe lava earlier this year, when I visited Réunion Island back in March. Second of all, let me provide a little explanation about why I have been terribly negligent of this blog over the past few months, despite my best intentions at the beginning of the year. In January I fully intended to read one science …

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