Rocky gator
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Permanent Link: http://ufdc.ufl.edu/UF00091765/00001
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Title: Rocky gator
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Language: English
Creator: Department of Geological Sciences, College of Liberal Arts and Sciences, University of Florida
Publisher: Department of Geological Sciences, College of Liberal Arts and Sciences, University of Florida
Place of Publication: Gainesville, Fla.
Creation Date: 2008
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The Official Newsletter of the Department of Geological Sciences Fall 2008/Spring 2009

From the Department Chair...

Happy New Year to you all,
As the 2009 spring semester cranks up and 2008 comes
to an end, it's time to reflect on the events that have trans-
pired and changes that have occurred here in the Depart-
ment and at the University over the past year.
Our graduate program continues to thrive: we have
experienced increased numbers of undergraduate majors
s st I. ,, .- and our faculty has been successful in obtaining numer-
001o, i' ia .\ 11m Ii s1o,0 e ,. ous research grants. We now have a complete and won-
,ri tlls II Colomll4 11hc on a derfully functioning office staff of four that have allowed all of us to work more
icsc,-Jch tr pl .itI l'l I' c Ldllid, te efficiently and certainly made my life much easier.
We have begun to update and modify our class offerings, in part due to the
recent decrease in the number of faculty in the Department. Professors Neil Op-
Inside this issue: dyke and Guerry McClellan officially retired, Professor David Hodell is now the
Woodwardian Professor of Geology at the University of Cambridge (UK), and
A Research Trip to the Dr. Phil Neuhoff has relocated to Idaho. We were very sorry to see all of them
Bottom of the World .......................... leave but were, however, able to hire Dr. Mark Panning, a new Assistant Profes-
sor of Geophysics, who joined us this fall after completing a PhD at UC Berkeley
Our Future Geologists......................... 3 and a Postdoc at Princeton University. Dr. Panning's research focuses on model-
Department Honors Professors ing seismic waves to obtain 3D images of the deep structure of Earth and other
With A Celebratory Dinner.................. 3 planets. His work has revealed many intriguing aspects of mantle dynamics and
explanations for regions where the continents are anomalously thick. He and Dr.
Graduate Fellowship Fund Honors Ray Russo are creating a state-of-the-art seismic computing lab.
UF Graduate Raymond T. Skirvin......... 4
F Graduate Raymond T.kirvin........ It is clear that we are in the midst of difficult financial times and the University
PhD Student Had A Busy Summer...... 4 has suffered due to declining State revenues. Although we have taken a major cut
in our departmental expense account, funding for our graduate program (from
Startling Data from Machu Picchu...... 4 both the College and Alumni donations) remains solid and we look forward to
Gators Travel to India for Wedding...... 4 bringing in another fine class of graduate students in the Fall of 2009.
Mark Brenner Experienced Excellent Generous support from our loyal alumni and friends has also allowed us to
Summer (and Fall) Adventures...........5 continue to fund activities and programs such as field trips, external seminar
speakers and student travel to meetings that otherwise would be impossible. I
Current Graduate Students can't stress enough how important even small contributions to our Anniversary
Receive Prestigious Fellowships......... 5 Fund (that is eligible for matching State funds) are in keeping the Department
healthy and vibrant.
Postdoc Studies Eruption
Samples in Central America................ 6 I am grateful to all of you who have continued to support us in these fiscally
challenging times.
Geology Gators Attend GSA.................. 6
Adams Travels to New Zealand........... 6 Go Gators!
Michael Perfit
More Faculty and Research News....... 7 Michael Perfit
Spring 2009 Seminar Series ..............8 IT'S GREAT TO BE A FLORIDA GATOR!
Let Us Know What's Happening..........8 JIi iliffli(?T D H l I

2 ROCKY Gator

A Research Trip to the Bottom of the World
Four Gators traveled to the frigid continent of Antarctica twice this
past year. Graduate students Dylan Miner and P.J. Moore, and under-
graduate (and now Buckeye Grad student) Kelly Deuerling accompanied
Professor Jon Martin on two research cruises to the Bransfield Strait re-
gion just west of the Antarctic Peninsula.
The cruises were the field portion of an NSF-funded project designed
to understand how seasonality alters chemical and isotopic compositions
of foraminifera shells, an important variable in studies of paleo-climate
based on fossil foraminifera. Because of the intense seasonality at 60
south latitude, Antarctica is the ideal location for this study. Water depths
at the sampling sites ranged from about 600 to 1300 meters below the sea
surface, and "seasonality" as we normally think about it doesn't really
apply since at those depths it is always dark with temperatures hovering
about 2oC.
But high productivity in surface water during the summer shuts
down when sea ice forms during the winter. The project was designed
to see how benthic foraminifera react to varying inputs of organic carbon
over different seasons.
Since seasonality studies require sampling during at least two differ-
ent seasons, the Gators made the four-day, one-way trip across the Drake
Passage twice, once in mid-autumn (April) and then again in the dead
of winter (late June). The Drake crossing mostly wasn't too rough, if you don't
mind 60 knots of wind and 40 foot seas in driving snow storms.
Both trips lasted about three weeks, including several days in Punta Arenas,
Patagonia, Chile, where the ship was docked. Most of the rest of the time was
spent at sea except for several days at Palmer Station, Antarctica.
While at Palmer, all Gators became polar bears (actually the southern hemi-
sphere ecological equivalent, leopard seals) by taking a quick dip in the South-
ern Ocean. Unlike Gators' natural habitats, however, getting into the water at
Palmer required barefoot runs through snow and pushing icebergs away before
taking the plunge into water that was about minus 1C (yes-that's below freez-
ing, made possible by the salt content of the water).
The cruise was extremely successful with cores collected from seven sites
during both cruises (the original plan was to sample four sites), providing plenty
of material to keep Dylan busy for many years working on his MS degree.

The ROCKY Gator is the official
newsletter of the Univeisity of
Florida Depaitment of Geologi-
cal Sciences and issues ale pio-
vided flee of change to interested
friends of the depai tment, faculty,
students, and alumni. Due to bud-
get constraints, the ROCKY Gator
is pIinted in black-and-vhite, but
a color copy is available in pdf
format on our website at wvivv
geologyufl.edu. If you wish to
be included in our mailing list,
please contact the department
Program Assistant, Pam Haines,
at pghaines,,geology.ufl.edu, 01
write o phone the department
at 241 Williamson Hall, PO Box
112120, Gainesville, FL 32611-
2120, phone 3521 392-2231.
Dr. Michael Perfit
Associate Chaii
Dr. David Foster
Graduate Cooidinator
Dr. John Jaeger
Undergraduate Coordinatoi
Dr. Joseph Meert
Office Managei
Nita Fahm
Senior Fiscal Assistant
Susan Birungi
Program Assistant
Pamela Haines
April Huddleston

1 Il I II I 111111.'11 I II IIlit llI iI

Fall 2008/Spring 2009 3

2008, our graduate students hosted a pig roast at the Jones-
ville farm of Dr. Mark Brenner. On hand to begin network-
ing about just what it takes to join this elite group of rock
hounds were,from left to right, Emma Kamenov, daughter of
Assistant In George and Katrin Kamenov, Antonia Escobar,
daughter of doctoral candidate Jaime and Natalia Escobar,
and Yulee Zimmerman, son of Assistant Professor Andy
and Mi-Youn Zimmerman.

Above left, Dr. Philip Neuhoff; above
right, Dr. Neil Opdyke; below, Depart-
ment Chair Michael Perfit (right) presents
Dr. Guerry McClellan with his retirement
plaque; and below right, Dr. David Hodell
talks to graduate students and faculty.

Department Honors Professors
With A Celebratory Dinner
The Department of Geological Sciences honored
two retiring professors and two professors who left the
department at a celebration dinner at the Keene Fac-
ulty Center on August 29, 2008.
Department Chair Dr. Michael Prefit presented
Distinguished Professor Neil Opdyke and Professor
Guerry McClellan with plaques commemorating their
long-time service to the department and the University
of Florida.
Dr. Opdyke, a former chair of the department, re-
tired after 27 years of distinguished service as both
an educator and researcher specializing in paleomag-
netism and its application to tectonics and magneto-
stratigraphy, as well as paleoclimatology and paleo-
geography of the Phanerozoic.
Dr. McClellan retired from the department after
20 years of exemplary service as both an educator and
researcher specializing in environmental geology and
industrial minerals.
Dr. Perfit also presented Professor David Hodell
and Assistant Professor Philip Neuhoff with mahoga-
ny clocks bearing the University of Florida seal.
Dr. Hodell accepted a position as the Woodward-
ian Professor of Geology in the Department of Earth
Sciences at the University of Cambridge. As a profes-
sor of geology and Director of the Stable Isotope Labo-
ratory, Dr. Hodell has been teaching and conducting
research in paleoclimatology and isotope geology at
the University of Florida since 1986.
Dr. Neuhoff has been with the department since
2001 and also served as affiliate faculty since 2004 in
the School of Natural Resources and the Environment
at the University of Florida. His research interests fo-
cused on mineralogy and crystal chemistry of zeolites
and clay minerals, nanogeochemistry and geoinfor-
matics. Dr. Neuhoff also ran the Physical Geochemis-
try Research Group.
Most of the department's faculty, affiliate faculty,
staff, graduate students, and many undergraduate stu-
dents, as well as a few alumni, attended the dinner to
express their appreciation and well wishes to the four
faculty who were such integral members of our depart-
ment. They are missed.

4 ROCKY Gator

Graduate Fellowship Fund Honors UF Graduate Raymond T. Skirvin

The Raymond T.
Skirvin Graduate Fellow-
ship Fund was established
this past year to honor one
of our late Rocky Gators.
Raymond T. Skirvin, who
graduated from the Uni-
versity of Florida with his
Master of Science in Geol-
ogy in 1962, passed away
at the age of 75 in Houston
on October 8, 2006.
Mr. Skirvin was a Navy
veteran of the Korean War.
Following his discharge MS Geology, 1962
from the US Navy, he re-
sumed his education and began a happy, 50-year mar-
riage to Lorraine F. Skirvin. Upon completion of his
degree, Mr. Skirvin worked for Exxon as a petroleum
geologist in New Orleans, Houston and Singapore.
He and his wife, with son David and daughter San-
dra, returned from Singapore to settle in the Houston
area. He accepted a position with J.R. Butler and Com-
UF Student Had A Busy Summer
PhD student Misty Stroud attended the 2008 In-
tegrated Solid Earth Sciences (ISES) Summer School:
"Dates, Rates, and States" in Colorado Springs from
July 24 to 30, then participated in the workshop "Pre-
paring for an Academic Career in the Geosciences"
at the National Weather Center at the University of
Oklahoma from July 31 to August 3, 2008. Misty also
attended the 2008 Calabrian Summer School, a multi-
disciplinary international project coordinated by the
Lamont-Doherty Earth Observatory of Columbia Uni-
versity, at the Universita della Calabria, Arcavacata
(Cosenza), Italy, from September 1 through 12, 2008.

Startling Data from Machu Picchu
Assistant In Dr. George Kamenov and Emory Uni-
versity anthropologist Bethany Turner performed Sr
and Pb isotope analyses on human skeletal remains
buried at Machu Picchu, the famous Inca site in Peru.
Dramatic variations in the isotope ratios indicate that
none of Machu Pic-
chu's ancient resi-
dents were born at
the site.
The new data
suggest that people
were brought to Ma-
chu Picchu from all *
corners of the Inca
Empire, possibly to serve the Inca royalty during
their frequent visits to the famous site.

pany and eventually retired as executive vice presi-
dent. During his retirement years, Mr. Skirvin was an
avid reader, fisherman and lover of the outdoors.
The Raymond T. Skirvin Graduate Fellowship Fund
was established, in large part, by two of Mr. Skirvin's
classmates: Jon L. Thompson, former president of Exx-
onMobil Exploration Company, and James G. Floyd,
former president and CEO of the Houston Exploration
Ifyou wish to contribute to the Raymond T. Skirvin Grad-
uate Fellowship Fund, please contact Department Chair
Dr. Michael Perfit:
UF Department of Geological Sciences
PO Box 112120
Gainesville, FL 32611-2120
1352) 392-2231
All contributions are tax-deductible.

Gators Travel to India for Wedding
,; -: :~

Pictured above from left to right: Jennifer Gifford, Riya
Sharma, Vimal Pradhan, Edouard "Eddy" Ardisson-Pes-
quet, and Dr. Joseph Meert.

PhD student Vimal Roy Pradhan married his fian-
cee Riya Sharma on March 9, 2008 in the historic city of
Jaipur, state capital of Rajasthan. Dr. Joseph Meert, Vi-
mal's advisor, graduate student Jennifer Gifford, and
former graduate student Edouard Ardisson-Pesquet
also attended the festivities.

Fall 2008/Spring 2009 5

Mark Brenner Experienced Excellent Summer (and Fall) Adventures
Associate Professor Dr. Mark Brenner taught the In August 2008, Associate In Dr. Jason Curtis, PhD
UF Study Abroad class in tropical ecology in Yucatan, student Mary Beth Day, and Dr. Brenner collected sedi-
Mexico, from late June to early August 2008. This was ment cores in Lake Izabal, Guatemala for a paleoenvi-
Dr. Brenner's sixteenth year coordinating the course. ronmental study.

SJason Curtis prepares
a sediment/water in-
terface core for extru-
sion, as dubious locals
watch the operation.

S".... Dr. Brenner presented a keynote address, "Proyecto
Ii'INWll 1;C' Iam'll,. ;I aL 'll ca t a c, It I.Ill_, li Paleoambiental Lago Peten-Itzd: nuevas perspectives sobre
carbonate clays and silts that characterize the area near Rio el paleoambiente y el paleoclima de Centroamerica" ("The
Lagartos, on the north coast of the Yucatan Peninsula. Lake Petin-ItzA Paleoenvironment Project: New Per-
PhD student Man o I: tir o spectives On Past Environment and Climate in Central
Day and Yale li :;'L,- America") at the I Congreso Nacional Cienagas y Lagunas
sity PhD candidate, I'V t de Colombia: Homenaje al Dr. Thomas van der Hammen
Douglas row ash,,, t- (First National Congress on Wetlands and Lagoons of
ter collecting wat, ,li Colombia, in Honor of Dr. Thomas van der Hammen).
sediment samples t6,,, ,o The congress was held in Medellin, Colombia, on Sep-
cenote in Yucatan .\I- U tember 24, 25, and 26, 2008. Dr. Brenner also accompa-
co. Samples were c.4/,1.i t i,. nied Dr. Norberto Parra's geomorphology class on a
in August 2008 a, poi t ot two-day field trip.
a paleoclimate st~aJ l

Mary Beth Day picks her way
carefully through the spiny
vegetation of northern Yu-
catan, Mexico, after collecting Students, WIii
stemwater samples from gum- sediments ; tI,
bo limbo trees. Samples were hike up i t,ll- p
collected as part of a regional tary fan alo, tH,
climate study. Rio Cauc_

Current Graduate Students Receive Prestigious Fellowships
The Un\-erslt\- of Florida Department of Geological Sciences is \Ver proud of our current batch of gradu-
ate students. Follow ing are list of students w\ho are receiving financial assistance to pursue their degrees in
the form of two prestigious endo\ved fello\\-ships. The lon L aind Beverl\y A Thompson Fellow-shlp and the
-\lunmn Graduate Fellow-ship.

Thompson Fellows: Alumni Fellows:

Katherine Malone Nichelle Baxter Moutusi Roy

Julle Mathis Mary Beth Day Misty Stroud

Brittany Newstead Richard MacKenzie Chuang Xuan

Robert Sirianni

M111gyU Z11L1

6 ROCKY Gator

Postdoc Studies Eruption
Samples in Central America
In March of 2008, post-doctoral scientist Dr. Adam
Goss participated in a UF-sponsored field trip to the
Panama Canal in collaboration with scientists at the
Smithsonian Tropical Research Institute in Panama.
The objectives of the expedition were to map and
collect fresh volcanic and
plutonic rocks of the mid-
Miocene arc in order to
reconstruct the Neogene-
tectonic evolution of south-
ernmost Central America.
This once-in-a-lifetime op-
portunity was made possible
due to the ongoing Panama
SCanal expansion project that
is currently blasting away a
new cross-section across the
isthmus to accommodate
larger/wider ships through
the canal.
In addition, Dr. Goss has been actively working
with department chair Dr. Michael Perfit on obtaining
high-precision trace element and isotopic data for lava
samples from the 2005-06 eruption on the East Pacific
Rise previously collected by the remotely-operated ve-
hicle JASON and submersible ALVIN. These data show
that the mantle source of 2005-06 lavas has remained
relatively constant since the last eruption in 1991 and
that shallow-level processes, such as fractional crystal-
lization and magma mixing have changed the compo-
sition of 2005-06 precursor melts.
Using the UF multi-collector (MC) ICP-MS, Goss
has identified discrete changes in the Pb isotopic sig-
nature (like a mantle chemical fingerprint) occurring
over the seven-month duration of the 2005-06 erup-
tion. These findings mark the first time such isotopic
changes have been observed at this short time scale for
any seafloor eruptive event.
This NSF-funded research was presented at the an-
nual American Geophysical Meeting in San Francisco
in December.

Geology Gators Attend GSA
October saw the Gators descend upon Houston to
attend the Annual Meeting of the Geological Society of
America. Ten UF graduate students were able to attend
the meeting and present their research, supported in
part by the Alumni Fund.
Many outstanding papers and posters were pre-
sented at the meeting by attendees from UF, and a well-
visited recruiting booth was staffed by UF students
and faculty who did their best to convince interested
students that its great to be a Florida Gator.
Graduate students Ariel Bennett (M.Sc.), Jonathan
Banks (M.S.T), Jen Gifford (PhD), Jin Jin (M.Sc.), Abby
Langston (M.Sc.), Richard MacKenzie (PhD), PJ Moore
(PhD), Mou Roy (PhD), Misty Stroud (PhD), and Jie
Wang (PhD) presented results of their research.
Post-doctoral scientist Adam Goss and faculty
members David Foster, John Jaeger, Joe Meert, Paul
Mueller, Phil Neuhoff, and Jim Vogl also gave poster
presentation and talks.
Pictured above: Graduate students Jennifer Gifford, Rich
McKenzie, Ariel Bennett, and post-doctorial scientist Adam
Goss try to convince professor Joe Meert that it's great to be
a Florida Gator (rather than a Michigan Wolverine, as his
allegiance were apparently torn that day...).
Adams Travels to New Zealand
This past summer, Assistant Professor Dr. Peter
Adams traveled to New Zealand where he spent
two weeks with colleagues from the University of
Auckland, traveling to potential coastal research
sites. The west coast of New Zealand is a tectoni-
cally active margin that provides numerous exam-
ples of uplifted marine platforms.
Dr. Adams and his colleagues are investigat-
ing the origin and development of these platforms,
which are shaped by waves from the Tasman Sea,
in an effort to better understand the geomorphic
evolution of rocky coasts.

Fall 2008/Spring 2009 7

More Faculty and Research News
Dr. Michael Perfit presented a paper on "Origins of
Oceanic Dacites" at the 18th V.M. Goldschmidt Con-
ference in Vancouver, Canada this past summer.

Dr. Liz Screaton was co-chief on
Integrated Ocean Drilling Pro-
gram (IODP) Expedition 31
investigating evidence of eartih-
quakes and tsunami offshore ot

Dr. Dan Spangler, Emeritus con-
tinues to serve on the Second -\d
Hoc Committee on Florida H\--
drostratigraphic Unit Dehfnitiuon
The publication should be a .1\.111-
able through the Florida Geo-
logical Survey in 2009, and will replace the 1980s pub-
lication by the Survey which established the original
hydrogeologic standard aquifer systems definitions for
the State of Florida. Dr. Spangler was a charter member
of that first Ad Hoc committee.

Dr. Mark Brenner and Dr. Thomas J. Whitmore (Re-
search Assistant Professor in the Department of Envi-
ronmental Science, Policy, and Geography at the Uni-
versity of South Florida) serve as co-Editors-in-Chief
of the Journal of Pil ,.'liiaiil.,'l.'!

Dr. Andy Zimmerman recently received a grant from
the Geobiology and Low Temperature Geochemistry
division of NSF to study Black Carbon Remineraliza-
tion in the Environment. In addition to laboratory
studies of microbial oxidation of chars produced from
various biomass types and under a range of conditions,
he will travel to Brazil this summer to begin black car-


bon/soil weathering studies. These experiments will
not only fill a gap in our understanding of the global
carbon cycle, but may also help us develop potential
carbon sequestration materials to alleviate CO2 build-
up and global warming.

Dr. Neil Opdyke and Dr. Guerry
McClellan were honored with
the titles of Distinguished Pro-
fessor Emeritus and Professor
Emeritus, respectively, after their
retirement from the department
in 2008.

During September Dr. Michael
Perfit (pictured at left) and PhD
student Dorsey Wanless (below
left) traveled to Iceland to pres-
ent the results of their research at the International As-
sociation of Volcanology and Chemistry of the Earth's
Interior (IAVCEI) General Assembly in Reykjavic.
Before the meeting they also joined a field trip that
climbed the active volcano Hekla. Samples collected
will be used in the ever popular Igneous and Metamor-
phic Petrology Lab.

Dr. Jim Channell presented the Bullard Lecture at the
AGU meeting in San Francisco in December. This lec-
ture, named after Sir Edward Bullard (1907-1980), is one
of several "Bowie" lectures inaugurated in 1989 to com-
memorate the 50th presentation of the Bowie Medal,
AGU's highest honor named after AGU's first president.

Dr. Jim Channell was bestowed the honor of Distin-
guished Professor during the fall 2008 semester.

Dr. Mark Brenner gave the keynote lecture, entitled
"Groundwater Pumping and Irradiation of the Florida
(USA) Landscape," during the 4th International Sym-
posium on In Situ Nuclear Metrology as a Tool for Ra-
dioecology, in Rabat, Morocco, which took place Octo-
ber 13 through 16, 2008.

Dr. David Gust, Head of the School of Natural Resource
Sciences at the Queensland University of Technology
(QUT) in Brisbane, Australia, visited the department
for two weeks in December and talked about geosci-
ence and education in Australia. Our department has
entered into a cooperative agreement with QUT that
will allow for the exchange of faculty and students for
study and research between the two institutions.

Spring 2009 UF Geological Sciences Seminar Serie:

* Jan. 8,202Williamson Hall,3 p.m.
Excursions and Paleointensity: Integration of
Magnetic and Isotope Stratigraphies
Dr. James E. T. Channell
Distinguished Professor of Geology
University of Florida

* Jan. 15,202 Williamson Hall,3 p.m.
Inferring North American Continental
Evolution from Seismic Tomography
Dr. Suzan van der Lee
Associate Professor
Department of Earth and Planetary Sciences
Northwestern University

* Jan. 22,202Williamson Hall,3 p.m.
Ocean Acidification on the West Florida Shelf
Dr. Lisa L. Robbins
Senior Scientist and Oceanographer
Center for Coastal and Watershed Studies
United States Geological Survey
St. Petersburg, Florida

* Jan. 29,202 Williamson Hall,3 p.m.
Cape Roberts, ANDRILL and SHALDRIL:
Exploring theAntarcticMargin by Ice- and
Icebreaker-based Scientific Drilling
Dr. Sherwood W. Wise, Jr.
Professor of Paleontology
Shijun Jiang
PhD Candidate
Department of Geological Sciences
Florida State University

* Feb. 5,209 Emerson Hall, 3 p.m.
Managing Water for aSustainable Life
Dr. Daniel P. Loucks
Prof. of Water Resource Planning and Management
School of Civil and Environmental Engineering
Cornell University
(Hosted by the UF Water Institute)

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* Feb. 12, 202Williamson Hall,3 p.m.
A Western Aleutian Perspective on
the Genesis of lslandArcLavas
Dr. Gene Yogodzinski
Associate Professorand Associate Chair
Department of Geological Sciences
University of South Carolina

* Feb. 19, 202Williamson Hall,3 p.m.
Cretaceous-Tertiary Growth
of the Tibetan Plateau
Dr. Paul Kapp
Assoc. Prof. of Structural Geology and Tectonics
Department of Geosciences
University of Arizona, Tucson

* Feb. 26, 202 Williamson Hall, 3 p.m.
Inocermid Paleoecology, Bottom WaterAnoxia,
and Deposition of Cretaceous BlackShales on
Demerara Rise (Tropical Western North Atlantic)
Dr. Ken MacLeod
Assoc. Prof. of Paleontology and Biogeochemistry
Department of Geological Sciences
University of Missouri-Columbia

* March 5,282 Reitz Union, 3 p.m.
Presentation Title To Be Announced
Dr. Richard Wayne Skaggs
William Neal Reynolds Professorand
Distinguished University Professor
North Carolina State University
(Hostedbythe UF WaterInstitute)

* March 19,202 Williamson Hall, 3 p.m.
Atlantic Overturning Responses to
Ice Volume and Orbital Forcing
Dr. Lorraine Lisiecki
Professor of Paleoclimatology
Department of Earth Sciences
University of California, Santa Barbara

Let Us Know What's Happening
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ro-s~iblo-to Rock\ Gator. Univer-
si tV of Florida Department of Geo-
looicaI Sciences. P0 Bo\ 112120.
Gahne,ville, FL 32611-2120. P-inmiI



* March 26,202 Williamson Hall, 3 p.m.
Nitrogen Biochemistry in
the Itchetucknee River Ecosystem
Dr. Matthew J. Cohen
Assistant Professor
School of Forest Resources and Conservation
University of Florida

* April 1,202 Williamson Hall, 3 p.m.
Pulses of Rapid MetamorphicMineral Growth
and Related Tectonic Processes
Dr. Ethan Baxter
Assoc. Prof. of Isotope Geochemistry and Petrology
Department of Earth Sciences
Boston University

* April 9,202 Williamson Hall, 3 p.m.
Drip by Drip Cave Breath, Speleothems
and Paleodimate: Time Series Microcimate
Geochemistryin Hollow Ridge Cave
Dr. Philip "Flip" Froelich
Professor of Chemical Oceanography
Department of Oceanography
Florida State University

* April 16,202 Williamson Hall,3 p.m.
The Argentine Precordillera:
A Laurentian TerraneAccreted to Gondwana
Dr. William A. Thomas
Hudnall Professor and Department Chair
Department of Earth and Environmental Sciences
University of Kentucky