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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 …
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.
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.
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 …
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. …
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 …
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 …
June 19, 2017
Monday Geology Picture: Bogenfels Arch, Sperrgebiet, Namibia
I’m up in Namibia this week, so I thought it would be appropriate to share a picture that I took over the weekend of Bogenfels Rock Arch, which is located in the Sperrgebiet region of Namibia. I previously posted a similar picture back in 2015. See that post for some more information on the arch and the Sperrgebiet.
May 29, 2017
Monday Geology Picture: Kimberlite in Kimberley
For this week’s “Monday Geology Picture”, here’s a snap of a mine cart filled with kimberlite rocks — and a mantle xenolith or two. I took this picture last year when I visited The Big Hole Museum in Kimberley, South Africa. The rock kimberlite was named after the town of Kimberley, of course! For those who are unfamiliar, kimberlite is the ore that is mined for diamonds, and many of the …
May 22, 2017
Monday Geology Picture: A Vineyard & the Cape Fold Belt
For this week’s “Monday Geology Picture” here’s a view of the Cape Fold Belt with a vineyard in the foreground. I took this picture yesterday when I took a short walk with some friends through a vineyard located in the Stellenbosch winelands, just outside of my home city of Cape Town. You can see some impressive folding in those distant mountains!
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