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Hard to believe, but this is my 100th post.   I thought about doing something serious, but honestly, let’s just go with what has been successful for me: garnets throughout my geology career

Garnets in plane light from the Northeast Kingdom of Vermont (BA research):

ERG-25b from the Cow Mountain region of Vermont; garnet inclusions are clearly at an angle to the dominant biotite-muscovite foliation in the rock

Garnet back-scattered electrons (BSE) image from the Connecticut portion of the Bronson HIll terrane (MS research):

BSE image of 99ERG07c

Girl Scouts participating in a Rocks Rock badge workshop (Western Kentucky University, 2002).   We ran the workshop in conjunction with both the Campus Girl Scout troop & the Geology Club the year I taught at Western.

Juniors (4th-5th graders) examining a garnet schist for the rock ID portion of their badge

Wavelength dispersive X-ray spectroscopy (WDS) images from a sample from Payer Land in northeast Greenland (or the PhD project I didn’t end up working on):

WDS mapping of 438965. Garnets are green in the Fe map, blue in the Mg map, and very light in the CP.

In-situ picture of the rocks I did work on for my PhD from Alp de Confin in Switzerland:

bimodal garnet sample that contains kyanite (hard to see without direct sunlight in these samples) from the Adula Nappe

Outcrop photo from a 2007 Vassar field trip to Gore Mt in New York:

amphibole-pyroxene-garnet-plagioclase wall in the upper quarry at the Gore Mt mine

When I taught at the University of Pittsburgh at Johnstown, I started blogging.   At that time I started posting about photomicrographs, including one post about the “jellybean” mylonite from Payer Land.   Hmm, mylonites & garnets together 🙂

Garnet "fish" from the jellybean mylonite.

I started this blog when I moved from UPJ to Gustavus in the summer of 2010.  Over the course of the year, I posted several times during the year about garnets, but the most memorable to me is my summary of the 2010 GSA session in Colorado entitled “Garnet and Its Use in Unraveling Metamorphic and Tectonic Processes”.   Since I didn’t have any pictures to post the first time around, let me just say that garnet research is alive, well, and going in a multitude of directions according to that session.

And last summer I moved back to the Boston area.   Because I’ve only been teaching physical geology & solar system since moving, garnets haven’t come up much in conversation here recently.   In fact, my only garnet-related post was my submission to AW #43 earlier this week.   I obviously need to work on that!

pen & ink drawing of garnet gneiss from Best (1983)

So that’s a 100 posts.   Let’s hope I pick up the pace a bit, add a few more garnets, and hit 200 in less than 18 months 🙂

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My PowerPoint lecture notes started coming together when I taught for the first time back in 01-02.   At that point, textbooks did not give you access to digital versions of their figures, so I spent quite a bit of time cruising the internet looking for appropriate pictures & diagrams.   Quite a number of those original photos had sketchy to nonexistent place labels.   Over the years, I’ve replaced tons of these photos with ones I’ve taken, digital figures from textbooks, and just better random images from the internet.   I try hard to know where the image was taken, since the students seem to enjoy knowing that this one is from Hawaii or that one is from Mt. Etna.

This morning, I was going through my volcanoes lecture and one of the cinder cone pictures has a comment on it of “Mauna Loa? Haleakala? Somewhere completely different?”   Amazingly enough, the original image is still up on the web, but there’s no obvious label on it.   I believe it used to be labeled Haleakala, but all the other pictures on the page were from the Big Island & its url has “Maun” at the end, so I was skeptical about the label.   Can someone help me out?   Have you seen this place “live”?

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Garry has decided to post a bit about columnar basalts this week & has noticed a trend of a few other bloggers joining in, so I decided to join the party.

Back in Fall 2009, Callan and I went on a joint field trip to Shenandoah National Park (somewhere he’s posted about quite a bit).   One of the stops was to see a grouping of columnar basalts:

columnar basalts along the Limberlost Trail in Shenandoah (Callan standing on column w/ head chopped off)

Instead of the equant shape typically seem looking down the columns, there was some definite deformation that occurred post-emplacement:

Interestingly enough, while standing on the outcrop Callan commented that he and Kim had had a discussion about the deformation of these rocks.   Considering that Kim was my undergrad advisor (something Callan didn’t know), the blogosphere is a small world 🙂

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