Wooster Geology Majors Help with B-WISER

June 21st, 2011

The College’s of Wooster’s B-WISER (Buckeye Women In Science, Engineering, and Research) program for 7th and 8th grade girls descended upon Scovel Hall last week for some fun activities in geology. In an afternoon session with the campers, we divided them into several groups so that they could get more individualized attention as they moved from station to station. One station, which was taught by geology major Lindsey Bowman (’12), allowed the campers to look at a variety of minerals and igneous, sedimentary, and metamorphic rocks. The focus of the station, though, was a fossil exercise in which campers tried to identify invertebrate fossils from large Ordovician rock slabs that the Mark Wilson has collected over the years. These slabs primarily contained brachiopods, bryozoans, rugose corals, bivalves, and trilobite fragments. In the image below, Lindsey (far left, blue shirt) is helping the campers identify Ordovician fossils.

The other station involved recreating a dinosaur trackway from Texas. The dinosaur tracks, as well as the stride distances between footprints, were to scale. B-WISER campers were tasked with figuring out which dinosaur was moving faster (bipedal or quadrupedal) and then coming up with a hypothesis of dinosaur behavior at the time the trackway was made. With help from William Cary (’13) and myself, campers navigated the measuring and math required to complete the task. Below is an image of the trackway in Scovel Hall; the campers are busy calculating the footprint length and stride length, while William (green shirt) is in the background helping with the activity.

At the end of the afternoon, all B-WISER campers came together for a final activity involving Plate Tectonics. Campers participated in a JIGSAW exercise created by Dale Sawyer (Rice University) in which they are divided into speciality teams: geography, seismology, volcanology, and geochronology. After analyzing data from only their specialty, mixed groups are formed so that there is at least one person from each speciality. Campers then put all of the data sets together to determine the position of the major plate boundaries on Earth. The B-WISER campers appeared to have a great time throughout the week, and geology sure enjoyed their visit!!

Wooster geologists in the heart of American science

June 9th, 2011

ARLINGTON, VIRGINIA–The National Science Foundation (NSF) is a federal agency charged by Congress “to promote the progress of science; to advance the national health, prosperity, and welfare; to secure the national defense…” It had a budget last year of $6.9 billion and is a major source of funding for American scientific research, especially in colleges and universities. NSF is highly respected — and not a little feared — by working scientists. I visited NSF headquarters in Arlington, Virginia, for a meeting with Lisa Park Boush (Wooster ’88) who is a Program Director for Sedimentary Geology and Paleobiology. Although we were not discussing NSF business (we were transferring the Secretary position of The Paleontological Society from her to me), I learned a lot about the agency from Lisa. NSF officials work very hard, for one, and they are very concerned about the scientific communities they serve.

The impressive front of the NSF building in Arlington, Virginia.

Lisa Park Boush in her NSF office (with a coveted window view behind her). Lisa was one of my Independent Study students, so I am especially proud of her accomplishments and responsibilities.

Digital Geology

May 10th, 2011

With all of the excitement over digital presentations in Wooster’s Senior I.S. Symposium, we thought that it’s about time to highlight recent digital presentations with a geology twist. Enjoy!

Here’s a Vuvox collage of Becky’s Senior I.S. Project on the geochemistry of Icelandic subglacial pillow basalts:

Now try Lindsey’s Junior I.S. Prezi presentation, which explores the mineral compositions of Becky’s basalts.

If you like Prezi, you’ll want to see how Sarah used Prezi to present her Petrology project on trachyte.

While Prezi walks the viewer through the presentation, Glogster works more like a digital poster. Whitney used Glogster to illustrate her progress as she worked on her monzonite sample.

Of course, there’s always the classic documentary, like Andrew’s Dacite documentary. The documentary is closely related to the mockumentary – see Will’s petrology project on how to make a thin section as an example:

Even cartoons can convey geological information. Katharine’s Xtranormal characters discuss the identification of anorthosite.

And finally, if you’re looking for that certain geological bedtime story for your child, you’ll not want to miss Matt’s thrilling story about poikilitic textures and the case of the broken thin section.

When Volcanoes Erupt

April 6th, 2011

WOOSTER, OH – Students in the Geology of Natural Hazards course spent a day studying the products of volcanic eruptions. Here are some of the outstanding samples in our volcanic collection:

Reticulite is a delicate network of basaltic glass that forms during Hawaiian fire fountaining. Volatiles expand easily in the low-viscosity magma, creating a dense network of interconnected vesicles separated by thin strands of quenched lava (sideromelane).

Accretionary lapilli are rounded pea-sized pieces of tephra that consist of volcanic ash. Ash aggregates into balls because of electrostatic forces in the eruption column.

Volcanic bombs are formed when lava is ejected and becomes airborne. The fusiform bomb has a rounded aerodynamic shape with an elongated tail, which tells us that the material was molten when it was ejected and was shaped as it traveled through the air.

The glassy surface of this basalt shows the classic ropy texture of pahoehoe. Ropy pahoehoe develops when the surface of a lava flow becomes partially solidified and wrinkles as the underlying lava continues to flow.

Wooster Geologists Celebrate I.S. Monday

March 28th, 2011

WOOSTER, OH – Alumni will fondly recall the tradition of I.S. Monday, our annual celebration of the completion of I.S. Today, seniors celebrate their hard work by donning their commemorative t-shirts and marching in the I.S. parade. We salute you, seniors, and wish you luck on your upcoming oral defenses!

Congratulations to the Wooster Geology Class of 2011 for making it to I.S. Monday! Pictured from left to right: Micah Risacher ('11), Dr. Shelley Judge, Elizabeth Deering ('11), Michael Snader ('11), Megan Innis ('11), Dr. Meagen Pollock, Andrew "the Shark" Retzler ('11), and Becky Alcorn ('11). Members of the class of 2011 not pictured here: Jesse Davenport, Stephanie Jarvis, Sam Spencer, and LaShawna Weeks.

 

 

Postcard from Wooster, Ohio

February 22nd, 2011

On such a winter’s day.

Scovel Hall, The College of Wooster.

Front doors of Scovel Hall.

Kauke Hall at dawn.

Happy Birthday, Charles Darwin! An Occasion to Celebrate the Teaching of Evolution

February 12th, 2011

Portrait of Charles Darwin (with an editorial addition).

It is now a tradition among scientists to celebrate the birthday of the great English naturalist Charles Darwin.  He was born on February 12, 1809 — the very same day Abraham Lincoln entered the world.  (I have images of both men in my office as historical touchstones for the best of science and citizenship.)

Geologists like to remind the world that Darwin was one of their own.  He studied geology at Cambridge under the famous Adam Sedgwick and helped him map rock units in Wales one summer.  One of the primary influences on Darwin’s evolutionary ideas was the work of the uber-geologist Charles Lyell.  In fact, in an 1838 notebook, Darwin wrote:

“Pleasure of imagination. . . . I a geologist have illdefined notion of land covered with ocean, former animals, slow force cracking surface &c truly poetical.” [Maybe not so grammatical, but any geologist recognizes the sentiments!]

Charles Darwin, Geologist by Sandra Herbert is an excellent book on this topic (Cornell University Press, 2005, ISBN: 978-0-8014-4348-0).  I mention more of Darwin’s geological work and ideas in a recent podcast produced by The Wilderness Center. (The interview starts about 24 minutes into the program.)

The College of Wooster has a rich history of grappling with the tensions between its Presbyterian foundation and the new Darwinian evolution.  In the late 19th Century when evolution was mentioned in Wooster publications, it was always negative.  In The Post-Graduate and Wooster Quarterly of October 1890, for example, Professors Jonas O. Notestein and Elias Compton wrote in a review: “The whole essay is well calculated to wake up evolutionists to see either that there are more things in heaven and earth than are dreamed of in their philosophy, or else that it had been better if they had never been born.”  (I walk by a large portrait of stern Professor Compton every time I enter our second floor Scovel Hall lecture room … to teach evolution!)

In 1894, the astronomer Samuel Phelps Leland gave a talk at Wooster in which he said, “Your great, great, great, great, great grandfather was never a pollywog, and your great, great, great, great grandfather was never a ring tailed monkey.  No relative of yours was ever anything but a man; there is no connecting link between the mortal and the immortal.”  The Wooster Voice campus newspaper writers at the time thought it was a fine speech.  I find some pleasure in another famously wrong quote from Dr. Leland three years later: “… it will be possible to see cities on Mars, to detect navies in his harbors, and the smoke of great manufacturing cities and towns… Is Mars inhabited? There can be little doubt of it … conditions are all favorable for life, and life, too, of a high order. It is not improbable that there are beings there with a civilization as high, if not higher, than our own. Is it possible to know this of a certainty? Certainly.” (From World Making, p. 68-69; Woman’s Temperance Publishing Association, Chicago, 1898.)

Just a year after Samuel Phelps Leland dismissed Darwin at Wooster, a young biology professor named Horace N. Mateer began to teach a course on campus titled “Organic Descent”.  In his Wooster Catalogue description, Dr. Mateer wrote that “the doctrine of development by descent has come to be regarded as the basic factor in the study of organic life”.  With careful language and judicious politics, he broke through the resistance and taught evolution openly at Wooster for the first time.  He was very cautious indeed: he did not write the word “evolution” itself into any course description (it did not appear in a Wooster Catalogue until 1963!), and he repeatedly gave a popular talk on campus called “Evolution and Christianity” in which he essentially avoided Darwinian natural selection in favor of a kind of progressive creationism that correlated with biological and geological evidence.  Nevertheless, Professor Mateer laid the foundations for secular evolutionary science at Wooster.

(The story of evolution at Wooster is told in more detail in an article I wrote for the Fall 2002 issue of Wooster magazine.)

Meteorites Observed on the College of Wooster Campus!

February 8th, 2011

WOOSTER, OH – So the meteorites didn’t exactly fall from the sky today, but our GeoClub speaker let us see some samples from his own meteorite collection. Dr. Ed Young, UCLA Cosmochemist and Wooster Geology Alum (’81), gave a fascinating talk today on his research, which uses oxygen isotopes in meteorites to understand the origin and evolution of the solar system. He took us through the complicated taxonomy of meteorite classification and gave us a primer on oxygen isotopes before blowing our minds with supernova explosions, star formation, and uniqueness of our own solar system. I think the talk is best summarized by a quote from one of our current majors, “Now all I want to do is be a grad student and go to Antarctica and collect meteorites.”

Dr. Ed Young ('81, on the right) with his favorite TA and fellow Wooster alum, Dr. Mark Wilson (left).

Because ice is a mineral …

February 1st, 2011

… we should record this morning’s ice storm in Wooster. You can read about the surprising properties of water ice as well on Wikipedia.

Ice on the holly tree near the back door of Scovel Hall in Wooster, Ohio.

The view from Scovel Hall across the College Mall to Severance Chemistry.

This makes me long for hot desert days.

In praise of the humble Ro-Tap

January 25th, 2011

While we celebrate our new XRF and XRD equipment in Dr. Meagen Pollock’s petrology lab (which has already produced actual results), I thought we should also recognize our oldest piece of continuously-operated equipment in the department, the Ro-Tap Sieve Shaker:

This simple device was invented in the early 1900s by W.S. Tyler, and the company he founded still produces them today. The new versions are considerably sleeker than our massive machine. The Ro-Tap is designed to shake a series of nested sieves to sort granular materials into various size fractions. “Ro” refers to “rotate” and “Tap” to hammering at the top. You can imagine the noise that results. My Sedimentology & Stratigraphy class is using our ancient Ro-Tap (which was old when I was a student) to sort sediment samples. Each student was given a vial of an unknown sediment to describe by size distribution, mineralogy, grain shape and other characteristics. They will produce descriptive and statistical reports with conclusions about the possible environmental origins of the samples.

Joe Wilch preparing the sieve stack for the Ro-Tap.

The simple balance we use for weighing the size fractions, along with weighing trays and a datasheet.

Will Cary examining his unknown sediment sample with a photomicroscope. He is processing images through the computer on the right.

The beauty of science, especially Earth science, is that we blend the sophisticated and the simple as we describe and try to understand patterns in nature. You can stand in the basement of Scovel on some afternoons and hear the quiet purring of the X-Ray equipment as the steadfast old Ro-Tap bangs away in the background as it has for decades.

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