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September 1, 2014
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 …
July 30, 2012
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 …
January 9, 2012
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 …
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 …
