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April 16, 2018

Monday Geology Picture: Another View of Formica Leo Volcanic Crater

Last week I shared a picture of the beautiful and impressive Formica Leo, a volcanic crater located at the Piton de la Fournaise volcano on Réunion Island in the Indian Ocean. Last week’s picture showed the crater from a distance. You can just barely make out some small people in last week’s picture, to give you some sense of scale. However, I thought I would share a closer view of …

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April 9, 2018

Monday Geology Picture: Formica Leo Volcanic Crater

Today I’m sharing a picture of the stunning Formica Leo (foreground), a volcanic crater located at the Piton de la Fournaise volcano on Réunion Island in the Indian Ocean. My husband and I hiked up this crater when we visited the island for a holiday last year. We also hiked up to the top of the volcanic hill in the distance — crossing over a number of lava flows of …

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January 22, 2018

Monday Geology Picture: Pele’s Hair

For this week’s post, here’s a picture showing a lovely example of Pele’s Hair, which is a type of volcanic glass that consists of fibers or thin strands. Although I’ve visited many volcanoes (including a few active ones) over the years, I’ve never seen Pele’s Hair in the field. So, I was quite happy to see this excellent example in the volcano museum on Réunion Island. I visited the museum during …

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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 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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May 15, 2017

Monday Geology Picture: Pahoehoe Lava Flow

For this week’s “Monday Geology Picture” here’s a stunning example of a pahoehoe lava flow. I took this picture back in March when I visited Piton de la Fournaise volcano on Réunion Island. I’ll be sharing more pictures from Réunion soon – stay tuned!

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