You are browsing the archive for basalt Archives - Georneys.

May 15, 2017

Monday Geology Picture: Pahoehoe Lava Flow

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!

Read More >>

No Comments/Trackbacks >>


September 13, 2014

Chamarel Waterfall, Mauritius

Chamarel Waterfall, Mauritius

Today I’m continuing with sharing some pictures from my March 2014 trip to the volcanic island of Mauritius. You can see some of my previous posts on Mauritius here, here, and here. Mauritius is a tropical island, so in many places the lava rocks, particularly the older ones, are covered by thick green vegetation. However, there are some places where you can see the lavas well. One of those places is …

Read More >>

No Comments/Trackbacks >>


September 8, 2014

The Young Volcanic Landscape of Mauritius

The Young Volcanic Landscape of Mauritius

For the next little while, I will be blogging about my recent (March 2014) vacation to Mauritius, a young volcanic island in the Indian Ocean. I recently shared a couple of pictures of volcanic basalt in Mauritius for my “Monday Geology Picture” posts here and here. In future posts, I’ll write a little more about the volcanic history of Mauritius. In brief, Mauritius is believed to have been formed by a …

Read More >>

2 Comments/Trackbacks >>


Monday Geology Picture(s): Vesicular Basalt Boulder, Mauritius

Monday Geology Picture(s): Vesicular Basalt Boulder, Mauritius

Continuing with some pictures from my trip to Mauritius back in March, for this week’s “Monday Geology Picture” post I am sharing some pictures of a large boulder of vesicular basalt. This particular boulder is located in the town of Grand Gaube in northern Mauritius and is used as a decorative stone on which a plaque has been mounted. Vesicular basalt is a dark-colored volcanic rock that contains many small holes, …

Read More >>

No Comments/Trackbacks >>


September 1, 2014

Monday Geology Picture: Black Basalt on the Beach, Mauritius

Monday Geology Picture: Black Basalt on the Beach, Mauritius

First of all, my apologies for the long absence from blogging. Work has been extremely busy this year, and for the last 6 weeks I was in the field with very spotty satellite internet connection. However, I’m back in Cape Town now, and September should be a quieter month for me, workwise. So, I’m hopeful that I will have time to catch up on some blogging. One of the things …

Read More >>

No Comments/Trackbacks >>


July 30, 2012

Monday Geology Picture(s): A Lava Road Closure on Hawai’i

Monday Geology Picture(s): A Lava Road Closure on Hawai'i

My friend Arthur recently visited Hawai’i and sent me some wonderful pictures of lava and basalt! My favorite picture is the one above of a former road now almost completely covered by basalt. Arthur informs me that the sign was for Chain of Craters Road, which is now buried under several meters of basalt in places. Here’s the approximate location of the roadsign. Arthur also sent me a few pictures …

Read More >>

No Comments/Trackbacks >>


January 9, 2012

Monday Geology Picture: Pillow Basalts in the Oman Ophiolite

Monday Geology Picture: Pillow Basalts in the Oman Ophiolite

I’m currently in Oman for a geology conference, so today’s geology picture is one I recently took here in the Samail Ophiolite. The picture shows some weathered and fractured pillow basalts with a pencil for scale. These are not the best-looking pillow basalts in the ophiolite. The freshest ones are found in the Geotimes sequence up in the northern part of the ophiolite whereas these weathered ones are the best …

Read More >>

9 Comments/Trackbacks >>


July 2, 2011

Geology Word of the Week: E is for Eclogite

Eclogite from the Mariánské Lázně Complex in the west Czech Republic.Keele collection. Check out those gorgeous pink garnets!Photo courtesy of Ian Stimpson. def. Eclogite:A high-pressure, high-temperature, coarse-grained metamorphic rock consisting primarily of pink-red garnet (almadine-pyrope variety) and green pyroxene (omphacite, a sodium-rich variety). Eclogites may also contain small amounts of other high-pressure minerals such as kyanite, quartz, hornblende, and zoisite. Eclogites form when mafic rock (basalt or gabbro) descends deep …

Read More >>

4 Comments/Trackbacks >>