April 2, 2012 10:57 pm in Monday Geology Picture, Ninetyeast Ridge by Evelyn Mervine
Two weeks ago I posted a picture of a fragment of boytroidal ferromanganese crust that was dredged from the Ninetyeast Ridge in the Indian Ocean. Today I thought I would share a few pictures of a ferromanganese-encrusted boulder that was recovered from the Ninetyeast Ridge during the same 2007 expedition. Ferromanganese crusts actually caused some trouble for our rock descriptions. Before we could identify many rocks, we had to chip …
March 20, 2012 12:58 am in Monday Geology Picture, Ninetyeast Ridge by Evelyn Mervine
For this week’s geology picture, I thought I would share a picture of a neat botryoidal (grape-like texture) ferromanganese crust that was recovered during dredging along the Ninetyeast Ridge in the Indian Ocean in 2007. Ferromanganese crusts and nodules are commonly deposited in the ocean. They often form botryoidal shapes, such as the example above.
March 12, 2012 5:41 pm in carbon cycle, carbon dioxide, carbon sequestration, climate change, Monday Geology Picture, Oman, Ophiolite, Peridotite by Evelyn Mervine
Today I am going to share some pictures of listwanite (also sometimes spelled listvenite, listvanite, or listwaenite), an unusual rock type that I bet even some of the well-educated geologists who read this blog have never seen or even read about. I don’t even think there’s a wikipedia entry about listwanite. Perhaps I’ll write one after my thesis defense next month. Listwanite forms when ultramafic rocks (most commonly mantle peridotites) …
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March 5, 2012 6:25 pm in Monday Geology Picture, Oman by Evelyn Mervine
For this week’s Monday Geology Picture post, I thought I would share some more pictures from my trip in January to Barr Al-Hikman, Oman. A few weeks ago, I posted about some crabs and their traces at Barr Al-Hikman. This week I am sharing some pictures of some large, beautiful, fossilized seashells which we observed along one of the beaches at Barr Al-Hikman. I believe that these seashell fossils formed …
February 7, 2012 9:38 pm in Middle East, Oman, Sand, trace fossils by Evelyn Mervine
My post yesterday about the crab houses in the sand at Barr Al-Hikman turned out to be quite popular, so I thought I’d share some more pictures of crabs and crab houses and other crab life traces which I observed at Barr Al-Hikman. In addition to the Ocypode saratan “ghost” crab (thanks for the identification help, Tony Martin!), I observed at least two other species of crab at Barr Al-Hikman. …
February 6, 2012 9:59 pm in Middle East, Monday Geology Picture, Oman, Sand, trace fossils by Evelyn Mervine
Last month I participated in a three-day geology field trip to Barr Al-Hikman, a peninsula in Oman. On the peninsula there are numerous beautiful beaches and interesting geological features such as sabkhas and paleolagoons. We visited the peninsula to look at some recent carbonate deposits and also to investigate some modern beach features, such as the coral reefs located just off shore and the traces left on the beach by …
January 18, 2012 10:42 am in Mantle, Middle East, Oman, Ophiolite, Peridotite by Evelyn Mervine
Over the past couple of weeks, I posted pictures of pillow basalts and sheeted dikes in the Samail Ophiolite, Oman. To round out the crustal ophiolite sequence, I thought I would post a couple of pictures of mantle peridotite in the Samail Ophiolite. As you can see in the below pictures, mantle peridotite in the Samail Ophiolite is generally highly-weathered and a dullish brown color. Harzburgite tends to be a …
January 17, 2012 8:54 am in dolerite, Middle East, Oman, Ophiolite, sheeted dikes by Evelyn Mervine
Last week I posted a picture of pillow basalts in the Samail Ophiolite, Oman. I recently visited Oman for a geology conference, and I was fortunate enough to see pillow basalts and many other wonderful geological sights in the Oman mountains and beyond. When I posted the picture of pillow basalts, geoblogger Ron Schott asked if I also had some pictures of sheeted dikes with chill margins. Good news, Ron. …
January 9, 2012 6:00 am in basalt, marine geology, Middle East, Monday Geology Picture, Oman, Ophiolite by Evelyn Mervine
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 …
November 2, 2011 10:19 am in feminism by Evelyn Mervine
You are born into a name, which helps define and demarcate your identity. If you are lucky, your parents will provide you with a wonderful name, such as Evelyn Martinique Mervine. If you are unlucky, your parents will provide you with a less-wonderful name, such as a long one that contains both the word “Herbert” and the symbol “IV.” My husband may or may not have such a name. In …