Student works with top scholars in anthropology


November 12, 2013

Faye McGechie is one of many Arizona State University undergraduate students engaged in research projects under the direct guidance of top-level faculty. In this case, she has Institute of Human Origins director and paleoanthropologist William Kimbel showing her the ropes.

McGechie, who is a junior in anthropology, is already well under way in building a solid foundation in field and lab work. Download Full Image

Last fall, she spent six weeks in Ethiopia as part of the ASU Hadar field school led by Kimbel. Working with world-renowned anthropology faculty from ASU – as well as students, Afar locals and Australian and Israeli researchers – she surveyed the desert land for fossilized bone. The work was part of a project investigating the age and origin of bones modified by stone tools.

McGechie calls doing field work at the discovery site of the famed 3.18-million-year-old skeleton “Lucy” a dream come true.

She says she's also pretty blown away by her opportunities at the Tempe campus to work with and learn from some of the top names in anthropology, including Kimbel, who specializes in hominid evolution in Africa.

Currently, she is engaged in a research project with evolutionary anthropology doctoral student Halszka Glowacka. McGechie is measuring more than 250 dental specimens for variation in features of the third molar, to determine if more than one species of pliopithecoid could be represented at the fossil site of Rudabánya. Kimbel is the endeavor’s primary supervisor.

In addition, McGechie recently worked as an intern in the Archaeological Chemistry Laboratory in the School of Human Evolution and Social Change in the College of Liberal Arts and Sciences. She is now interning as the Institute of Human Origins’ student worker.

McGechie is also pursuing original research with fellow anthropology major Lawrence Fatica, looking at the morphology of the elbow in various hominoids to see if climbing behavior can affect the joint’s appearance. McGechie and Fatica are in the process of securing funding for the project. Kimbel is acting as advisor.

“He is a fantastic resource,” McGechie explains. “He is always willing to listen to us when we come to him with our specific project laid out. He understands the hard work we have put into our projects and helps make them a reality.” 

Though McGechie is still formulating her honors thesis, she says that Kimbel will definitely be on her committee and instrumental in shaping her work.

As if her research efforts weren’t enough to keep her busy, McGechie also holds office as vice president of the Barrett Leadership and Service Team and the Undergraduate Anthropology Association.

She plans to continue on to graduate school in anthropology, followed by a career in the field.

Rebecca Howe

Communications Specialist, School of Human Evolution and Social Change

480-727-6577

Student explores ancient volcanic flows


November 12, 2013

Sarah Cronk is an undergraduate student in ASU’s School of Earth and Space Exploration – and yet if you sat down with her to talk about her radioisotope geochronology research in the San Francisco volcanic field in northern Arizona, you might think she was already a tenured professor.

An earth and space exploration major with a concentration in geology and a student in the Barrett Honors College, Cronk carries herself with great poise and confidence – for good reason. She has already conducted fieldwork with a well-respected geologist and has experienced the rigors of a research expedition in the Himalayas. Download Full Image

“What I'm really interested in is the various radioisotopic dating methods and my project allows me to explore the (U-Th)/He system in depth with a leading expert in the field, professor Hodges,” says Cronk, who will graduate in May 2014.

Over fall break, with the help of Kip Hodges, a professor in the School of Earth and Space Exploration (SESE), and research scientist Matthijs van Soest, Cronk conducted research in northern Arizona. Her project, which is focused on dating ancient basalt volcanic flows, is an offshoot of work that Hodges did in the Taos Plateau volcanic field in New Mexico.

Many attempts have been made at dating the various volcanoes and flows in the San Francisco volcanic field in northern Arizona. Cronk performed her field work near SP crater, whose age estimates are anywhere from several thousand years old to tens of thousands of years old. Cronk and her senior mentors performed the fieldwork together; however, she does much of the lab work on her own, under the tutelage of research staff, postdoctoral associates and graduate students working in Hodges’ lab.

“Absolute dating of young – we are talking Pleistocene – basalt volcanic flows has proved difficult for a variety of factors," Cronk explains. "What I'm doing is exploring a novice method to dating these flows by examining the (U-Th)/He systematics of detrital zircon and apatite in sediments immediately underneath the flow, or the ‘baked zone.’ By performing lab work on sediments I collected, I will isolate zircon and apatite grains and then date them to hopefully get a more secure and competitive age on the young volcanoes there.”

Cronk is completing an honors thesis on the topic of radioisotope geochronology.

“I see Kip several times a week – via one of his courses, a lab meeting and a meeting whenever I need one," she adds. "Considering he was the founding director of the school and his stature in the field of tectonics, Kip is really down to earth. He understands how important it is to influence undergraduates and is always willing to take time from his busy schedule to work with me. Because of him and his team, my research experience has been exceptional and as a result, I have full confidence that I will be prepared for my next academic challenge.”

Cronk’s radioisotope geochronology and thermochronology course, which Hodges teaches, gives her insight on the several methods that are in application in the geosciences today.

“Sarah has proved a real joy for my laboratory colleagues and I to work with,” says Hodges. “Always upbeat, always having fun, but with a real passion for serious science. She’s a role model for us all.”

Nikki Cassis

marketing and communications director, School of Earth and Space Exploration