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Simon at Metageologist is hosting AW #44 this month & the chosen theme is “Most important teacher.”   I have to say, this was an easy choice for me, though as I thought about it a bit more I realized that I really should also give a few “runner-up” acknowledgements.

For me, the title “important teacher” comes into play because that person has influenced not just my knowledge of a particular subject, but has also changed how I address research or teaching or just life in general (or all three).   So, I need to give a few shout-outs per category first:

  • most influential on how I live my life: this one goes to someone who was never actually a “teacher” but was instead my Girl Scout leader in high school.   I’m a nerd.   I’m a nerd who was in Girl Scouting all the way through high school eventually earning my Gold Award (equivalent of the Eagle Scout).   I had a variety of leaders over the years, most of whom were mothers of someone in the troop.   But Barb Burri was a single woman who was crazy enough to be the leader of the high school troop in the town I grew up in.   At the time, Barb worked in computers (she’s changed careers since then…), she liked camping, skiing, hiking, cooking, reading, had a wicked sense of humor, and would voluntarily spend Wednesday nights with a group of high schoolers.   I grew up in a family that spent plenty of time outdoors, but here was a woman that would encourage us to try and cook a 35-lb turkey at a town-wide encampment and who was willing to discuss a wide-range of topics I never really wanted to bring up with my parents.   Because of Barb, I’m now the crazy woman with a troop of middle school girls (none of which is mine…), who volunteers my time freely to a wide-range of organizations, and could make the hard decisions about balancing life vs. work without agonizing about it.
  • most influencial on my teaching style: this has to go to Jim Brophy at Indiana University, who opened my eyes to ways to teach other than just lecturing (sorry to all of my school & undergrad profs, who probably also tried this — I just didn’t get the message); my 1st semester as a grad student, I worked under Jim on an Earth Materials class for envi studies and education undergrads with a few archeology grad students thrown in for fun and sitting in the back of the class was eye-opening.   Jim used reading reflections that were due before class started, he had interactive questions for the students to discuss in small groups during lecture, and the analogies he used (M&M’s in a bucket for xtal fractionation) stick with me even 10+ years later.   I still teach plate tectonics & the model of the atom the way he did in that class, because he started with the evidence & moved to what current paradigms are while demonstrating the scientific process along the way.   I took several grad classes with Jim during my two years at IU, which were all great, but the most memorable was learning MELTS by starting with the original simple mixing model papers and reading the literature that forms the backbone for this powerhouse of ig pet.   Other people have influenced my teaching style, but none as much as Jim.   Oh, and Jim would also want you to know: a basalt is NOT a basalt is NOT a basalt.
  • most influential on my research: Jane Gilotti at UIowa.   (a few people may now start wondering if aliens have taken over my blog, but I’m serious on this one)   Jane has very, very high expectations and pushed me more than anyone else I’ve worked with.   When I took microstructural analysis with Jane my first semester at Iowa, she flat out told me that my work was going to be graded to a higher standard than the masters or undergrads in the class.   My thin section sketches back from that class are covered in red.   But I worked my butt off to get my presentation & paper for that class up to her standards.   I continued to work like crazy to get my talks up to par over the next few years and one of my most treasured compliments was a “well-done” from Jane after I ran the tectonics research group discussion a few years into my PhD.   My writing improved greatly under Jane (though it probably could still be better), which has made writing papers, proposals, and even just short statements for students that much easier.   Its Jane’s high standards that really pushed me and I’m grateful for it.

Ok, so now that I’ve rambled on a bit about the runner’s up, my real choice for “most important teacher” is: Kim Hannula.   (Kim, you could stop reading now…)   I lucked out and was assigned to Kim’s freshman seminar class my first year at Middlebury.   I was the stubborn student who thought she knew exactly what she was going to do & when, but Kim managed to steer me over the next few years, so that somehow I ended up at a metamorphic geologist and not as a planetary scientist (based on jobs available, best decision ever).

Teaching-wise, Kim would always write an outline of the topics that were going to be covered that day on the board, so we had an idea of where we were in the day’s lecture — my outline is a reoccurring slide in powerpoint, but same idea.   Some of my intro labs (and the majority of my structure labs) are either directly taken from Kim or modified to some extent from what I did as an undergrad.

From the research side, I worked with Kim in the Northeast Kingdom of Vermont on my undergraduate thesis.   The numbering scheme I use to collect rocks, what my field notebook looks like, how I tend to set up the organization of a paper vs. appendices are all things that I learned during that project from Kim.   And since that project had some pitfalls, it was also from Kim that I learned that what you want to do isn’t always what you’ll end up being able to do, but the alternative might actually be more interesting in the long run.   Good thing I had that knowledge before I tackled my masters rocks or I might still be trying to figure out what was going on in those darn amphibolites.   Once I started advising senior theses, I also tried to bring back into mind Kim’s interaction with me so that I could be that “good” advisor who actually was a help to my advisee.

On the personal side, I learned from Kim not to give up.   (I’ll let Kim explain in her own words.)

In addition to being a great teacher, Kim has also been a wonderful mentor, someone who kicks my butt about not getting things done in a timely fashion, and a person who I rely on for good advice about both teaching and research.   If I can be that kind of teacher for my students, I’ll be happy.

I’m going to India on Saturday mainly just to go to India.   However, in order to justify the trip, I’m giving a talk on Tuesday, 13. March in Bangalore on x-ray tomography.   If anyone happens to be in the area, please come!   I’ll try to post a summary of the key points of the talk up either before I go or right after I get back.

My other goal for this trip to pick up a few pieces of Deccan flood basalt :)

__________________________________________

Raman Research Institute
Bangalore

Seminar

High-resolution X-ray Computed Tomography — a non-destructive method to
visualize the interior of solid objects

Elizabeth R. Goeke
Salem State University, USA

Abstract:  Application of High-resolution X-ray computed tomography (CT) to
study the internal spatial relationships in a wide-range of geological
materials has grown in the past decade.   CT scans are non-destructive,
relatively quick to obtain, and a wide-array of measurement and
visualization methods have been developed  to analyze the data.   Comparison
between CT methods and traditional destructive  serial sectioning results in
analyses that closely correspond and are usually within error of each other.
The variation of X-ray attenuation within objects relates closely to density
and is used to differentiate between variations in the materials or phases
within the analyzed sample.  High-resolution CT analysis has a scale of
resolution of approximately ~100 microns, while ultra-high-resolution scans
may reach ~10 microns.   Commercial high-resolution CT scanners are
available and require only counter-top space for setup as well as several
computers to process the data.   In addition to being safe to use on rare
samples such as meteorites and fossils, CT analysis has also been applied to
crystal size distribution studies in metamorphic and igneous rocks,
microstructural analysis of shear zones, characterization of soil and
pore-space morphology, and distribution of economic mineral genesis and
processing.

on Tuesday,  13 March 2012, at 11:30 a.m.
Venue: Library Block lecture hall
All  are  welcome

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 :)

What my students discovered for news:

Ok, time to grade more exams.   Fun.   Only a few days to India!

This is the week right before spring break, so I’ve fallen behind a bit in posting while I was distracted by writing a few exams.   I’m going to India starting on Saturday, so I hopefully can catch up (if not get a bit ahead!) this week.

News stories:

(The impact story was popular as was the Titan story–both had multiple summaries.)

I should get the my physical geology’s summary up later today.

The deadline for Accretionary Wedge #43 – “my favorite geological illustration” was extended, which finally kicked me into deciding what to post.   There are a number of diagrams I love that people have already used (Erik’s bubble figure, the Wooster fun with chemographic diagrams, MK’s subduction zone — which I’ve drawn on tables at Italian restaurants & on onsies at baby showers).   And then there were the ones that were finalists (Tharp ocean map is awesome, the USGS Volcanic Hazards poster is basically reproduced by students during intro classes, the different types of silicates), but in the end, I had to go for what I truly know — metamorphic thin sections.   Though photomicrographs are gorgeous, to truly “see” what’s going on with textures, you need to draw them by hand.   The old-fashioned pen & ink drawings draw your eyes to the key features — ah, for the days when every department had an in-department scientific illustrator.

The following illustrations are of the progressive syntectonic metamorphism of a volcanic graywacke from New Zealand. The original illustrations are from Best (1982): Igneous and Metamorphic Petrology (W. H. Freeman, San Francisco).

original volcanic rock

burial of our volcanic rocks, which turns up the heat & pressure a bit:

breakdown of some of the hydrous material, recrystallization of material to start to form definite foliation

rock continues to be buried, which increases the amount of metamorphism:

continued breakdown of hydrous phases; beginning of segregation into "felsic" vs. "mafic" lithologies

as metamorphism continues, we finally get to the “good stuff” i.e. garnet :)

down to just muscovite & biotite as hydrous phases, with a higher mode of anhydrous garnet + garnet + oligoclase dominating; segregation is more pronounced

My students don’t really appreciate my insistence that they have to draw fields of view during mineralogy & petrology, but the process really helps them “see” what’s going on so much better.   And though most of them are not in the running to become scientific illustrators in the long run, I do really enjoy grading those labs.

(now that I’ve graded the solar system summaries, its time to tackle physical geology)

The most popular article this week was about the earthquake in Missouri, in case you were wondering :)

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