Resume

• 2009

  Doctor of Philosophy (Ph.D.)

  Ph.D. dissertation title:\nApplication of Strontium Isotopes in Paleoclimatology

  Paleohydrology and Chemostratigraphy: The Eocene Green River Formation

  Wyoming

  Geosciences

  University of Wisconsin-Madison

• 2005

  Master of Science (MS)

  M.S thesis title:\nSequence stratigraphy of the Cambrian St. Lawrence Formation

  Wisconsin

  Geology/Earth Science

  General

  University of Wisconsin-Madison

• University of Wisconsin-Madison

  STEM volunteer

  Research

  Sedimentology

  PowerPoint

  Sequence Stratigraphy

  Microsoft Word

  Earth Science

  Geochemistry

  Microsoft Excel

  Stratigraphy

  Field Work

  Microsoft Office

  carbonate sedimentology

  Statistics

  Geology

  Social Media

  Data Analysis

  Mineralogy

  Science

  Public Speaking

  Petrology

  Chronostratigraphic Correlation of Lacustrine Deposits Using 87SR/86SR Ratios

  Eocene Green River Formation

  Wyoming

  U.S.A.

  ABSTRACT: The reconstruction of detailed

  basin-scale depositional histories from sedimentary rocks fundamentally depends on the availability of reliable time markers. Unlike marine strata

  lacustrine strata typically lack rapidly evolving

  cosmopolitan fauna or flora that might serve this purpose. Depending on their geologic context

  lacustrine strata may also lack tephras that could provide isochronous markers or radioisotopic age. Variations in 87Sr/86Sr ratios could potentially provide an alternative means of chronostratigraphic correlation for carbonate-rich lake deposits

  based on the hypothesis that Sr isotopes are well mixed in a lake and do not experience significant fractionation. To test this hypothesis we measured 87Sr/86Sr ratios in 114 samples from two drill cores of the upper Wilkins Peak Member from the Green River Formation that are located ~ 23 km apart. These cores can be independently correlated using distinctive tephras and organic-carbon rich mudstone horizons. Measured 87Sr/86Sr ratios range from 0.71154 to 0.71504

  and vary inversely with lake-water depth

  as interpreted by sedimentary lithofacies characteristics. Lower ratios of 87Sr/86Sr are found in lithofacies deposited during lake highstands

  which are marked by laminated dark-gray mudstone and elevated organic-carbon enrichment (as measured by Fischer Assay analysis). Higher 87Sr/86Sr ratios occur in lithofacies deposited during lake lowstands

  which are marked by organic-lean gray-green mudstone. 87Sr/86Sr in approximately time-equivalent samples from the two cores show a strong positive correlation (r ¼ 0.68)

  despite the likely presence of small temporal mismatches between approximately correlative samples. We conclude that lake-water was consistently well mixed with respect to Sr across distances of at least 23 km. These results suggest that 87Sr/86Sr can serve as a powerful tool to aid highresolution chronostratigraphic correlation of lake deposits.

  Chronostratigraphic Correlation of Lacustrine Deposits Using 87SR/86SR Ratios

  Eocene Green River Formation

  Wyoming

  U.S.A.

  Clark M. Johnson

  Brian L. Beard

  Alan R. Carroll

  Stephen R. Meyers

  Abstract The Green River Formation (GRF) provides one of the premier paleoclimate archives of the Early Eocene Climatic Optimum (∼50Ma)

  representing the apex of the early Cenozoic greenhouse climate. Rhythmic lake-level variability expressed in the GRF has inspired numerous hypotheses for the behavior of the Eocene hydrologic cycle

  including its linkage to astronomical forcing

  solar variability

  and the El Niño Southern Oscillation (ENSO). However

  the lack of sufficient proxy data to document atmospheric water mass transport and the geographic pattern of evaporation/precipitation/runoff has made it difficult to discriminate between different models for astronomical forcing. Variable 87Sr/86Sr ratios of bedrock that encompass the GRF provide an opportunity to reconstruct the spatial expression of the Eocene hydrologic cycle and its linkage to lake level. Here Sr isotope data from the Wilkins Peak Member

  a rhythmic succession that has been demonstrated to record Milankovitch forcing of lake levels

  indicate that high lake levels reflect an increased proportion of runoff from less radiogenic rocks west of the basin

  eliminating a number of the existing astronomical-forcing hypotheses. The 87Sr/86Sr variability is consistent with a change in mean ENSO state

  which is predicted by climate models to be linked to orbital-insolation. Thus

  the 87Sr/86Sr data reveal a coupling of high frequency (ENSO) and low frequency (astronomical) climate variability

  and also predict the existence of sizable astronomically-forced alpine snowpack during the last greenhouse climate. More broadly

  this study demonstrates the utility of 87Sr/86Sr as a powerful tool for reconstructing the deep-time hydrologic cycle.

  Lacustrine 87Sr/86Sr as a tracer to reconstruct Milankovitch forcing of the Eocene hydrologic cycle

  M'bark

  Baddouh

  PPD

  George Mason University

  University of Wisconsin-Madison

  University of Wisconsin-Madison

  South Dakota School of Mines and Technology

  Ranch A

  Buela

  Woyming

  Tafraoute

  Morocco

  Grenoble

  France

  Course focused on preparation of stratigraphic sections

  geologic maps

  structural cross sections

  and producing formal reports.

  Field Camp Instructor (Summer Only)

  South Dakota School of Mines and Technology

  Department of Atmospheric

  Oceanic and Earth Sciences

  Cretaceous Ocean Anoxic Event 2 Cyclostratigraphy at Demerara Rise: Micron-scale sedimentological/mineralogical data collection from finely laminated shale deposits for paleoclimate model validation.

  Postdoctoral Research Fellow

  George Mason University

  Madison

  Wisconsin

  Associate Lecturer

  University of Wisconsin-Madison

  Department of Atmospheric

  Oceanic and Earth Sciences

  George Mason University

  University of Wisconsin-Madison

  Geoscience Department

  Teaching Assistant

  UW-Madison

  Department of Geoscience\n\n• Spring (2015)- Survey of Oceanography (discussion): Lecturing and discussion regarding nature and behavior of ocean water

  interaction of oceans and atmosphere

  structure of the ocean floor

  life in the oceans

  our relationship to the marine environment.\n\n• Fall (2014)- Environmental Geology (discussion): Lecturing and discussion regarding earthquakes

  volcanoes and other natural hazards. Also

  plate tectonic and natural resources.\n\n• Spring (2013) and Fall (2014

  2015) - Evolution and Extinction (discussion): Lecturing and discussion regarding fossil record

  DNA

  biogeography and embryology.\n\n• Spring 2011- Geologic Evolution of Earth (lab and field trips): Lecturing

  lab and discussion regarding the physical evolution of Earth and its relationship to the development of life through geologic time.\n\n• Spring (2010) - Introduction to Geologic Structures (lab): Lecturing and discussion regarding the recognition and mapping of geologic structures in the field.

  Graduate Teaching Assistant

  Middelton

  Wisconsin

  Associate Scientist

  Pharmaceutical Product development

  Middleton

  WI\n• Performed complex sample preparation and analysis to measure pharmaceutical compounds in biological samples

  using multiple methods (acid-base extraction

  HPLC

  LC/MS/MS).\n\n• Responsible for data handling

  recording

  project organization

  and project data review

  and for documenting

  organizing

  storing and tracking standards.

  Associate Scientist

  PPD

  GSA

  AAPG

  AGU

  English

  French

  Arabic

  George J. Verville Award in Geology and Geophysics

  For scientific contributions

  leadership

  and perseverance.

  Geoscience Department-University of Wisconsin-Madison

  Field Camp Scholarship

  Geology and Geophysics department at University of Wisconsin-Madison