Traveling Workshop Program Facilitators
Kathryn Baldwin, Assistant Professor of Education, Eastern Washington University
Kathryn Baldwin is an Assistant Professor of Education at Eastern Washington University where I teach courses in science methods, social studies methods and educational assessment. I hold a B.S. and M.S. in Geology and an Ed.D. in Curriculum in Instruction - Science Education. My interests are in preservice and in-service teacher education, Earth science education, environmental and sustainability education, problem-based learning and systems thinking.
Rachel Beane, Professor, Associate Dean of Academic Affairs, Bowdoin College
Rachel Beane is a Professor of Earth and Oceanographic Science and Associate Dean of Academic Affairs at Bowdoin College. She is a Co-PI for the On the Cutting Edge. She was the lead convener from 2011-2016 for the week-long, Early Career Faculty: Teaching, Research, and Managing Your Career workshop. As Associate Dean, she focuses on faculty professional development and faculty diversity initiatives.
Patrick Belmont, Watershed Sciences, Utah State University
Patrick Belmont is an associate professor at the Utah State University. His research combines hydrology and geomorphology with general interests in sediment dynamics and feedbacks between geomorphic and ecological systems. He received his PhD in Earth and Environmental Sciences from Lehigh University in Bethlehem, PA. He was a Postdoctoral Associate at the University of Minnesota working with the National Center for Earth Surface Dynamics.
Pete Berquist, Associate Professor, Geology, Thomas Nelson Community College
Peter Berquist is an associate professor at Thomas Nelson Community College. His professional interests focus on finding professional opportunities for students, field education, incorporating research, data, and quantitative reasoning into classes, developing critical thinking and problem-solving skills. He co-convened the 2013 workshop Forging Professional Opportunities between Community Colleges and the Workforce at Thomas Nelson Community College, the 2014 workshop Supporting the Whole Student: Strategies for Success in the Classroom, Transferring, and Finding Professional Opportunities at J. Sargent Reynolds Community College and the 2015 workshop Supporting Student Success for Under-prepared 2YC Students and Students with Disabilities at the College of William and Mary.
David Blockstein, Senior Scientists, National Council for Science and the Environment
David E. Blockstein, Ph.D. is Senior Scientist with the National Council for Science and the Environment (NCSE). Dr. Blockstein joined the organization in 1990 and served as its first Executive Director until 1993. Dr. Blockstein also serves as Executive Secretary of the Council of Environmental Deans and Directors (CEDD). CEDD, formed in 2001, is the professional organization for the nation's deans of colleges of environment and natural resources and directors of institutes for environmental studies. He is also the Executive Secretary of the Council of Energy Research ad Education Leaders (CEREL). Dr. Blockstein has worked on a wide range of science and policy issues including increasing the representation of minorities in science, climate change education, mechanisms to improve the linkage between science and decision making on environmental issues and electronic processes to communicate scientific information on the environment.
Tim Bralower, Geosciences, Pennsylvania State University-Main Campus
Tim Bralower is a professor at Penn State University. He has led development and online publishing of interdisciplinary courses in support of certificate program, Penn State-UNO distance learning program, and implementation programs for the InTeGrate project involving these materials.
Kate Darby, Environmental Science, US Environmental Protection Agency
Kate Darby is an assistant professor at Western Washington University. Her professional interests are in social and environmental justice, environmental justice pedagogy in higher education, sustainable food systems and urban socio-ecological systems. Her Ph.D. is in Anthropology (Environment, Science and Technology and Urban Ecology focus) from Arizona State University and her M.S. is in Environmental Studies and Certificate in Not-for-Profit Management from University of Oregon. Her academic training has been punctuated by sustainability work in the private sector with environmental consulting companies and NGOs.
Diane Doser, Professor, Department of Geological Sciences, University of Texas-El Paso
Dr. Diane Doser is a professor within the Department of Geological Sciences at the University of Texas at El Paso (UTEP), where she has taught for over 30 years. She has taught courses at all levels (high school to doctoral level) in geology, geophysics, geological engineering, and environmental science. She served as the first director of the BS in Environmental Science program (2000-2003), director of the MS program in Interdisciplinary Science (2001-2003) and chair of the Department of Geological Sciences from 2004-2008. She was the recipient of a UT Regents' Outstanding Teaching Award in 2010. She has been involved in the traveling workshop program since its inception.
Sue Ebanks, Marine & Environmental Sciences, Savannah State University
Dr. Sue Ebanks is an assistant professor in the Marine Science and Environmental Science programs at Savannah State University. She uses her interests in invertebrate ecology, physiology, and toxicology as a medium through which she can work with citizen scientists, undergraduates, and graduate students. This allows her the opportunity to be actively engaged in mentoring undergraduate research in aquatic physiology and toxicology, nurturing K-12 environmental awareness and STEM (science, technology, engineering, and mathematics) education, as well as promoting community education for environmental issues.
James Ebert, Department of Earth and Atmospheric Sciences, State University of New York College at Oneonta
Professor Ebert is a SUNY Distinguished Teaching Professor, former chair of the Department of Earth and Atmospheric Sciences, and former Interim Dean of Science and Social Science at the State University of New York College at Oneonta where he has taught since 1985. First, as a senior member of the department and then as chair, he helped guide his department through a wave of retirements and other turnover events that have resulted in an 80% change in the faculty. Professor Ebert's research interests include carbonate sedimentology, stratigraphy, Devonian time scale calibration and geoscience education, particularly the role of dual credit courses in recruiting geoscience majors. He directs the Oneonta Earth Science Outreach Program (ESOP), which enables 28 high schools in several states to offer dual credit geoscience courses. In addition, he created and hosts the ESPRIT listserv that connects over 2000 Earth Science teachers from 27 states and 5 countries in an online professional development community.
Anne Egger, Central Washington University
Anne Egger is the Director of Undergraduate Research and an Assistant Professor in the Geological Sciences and Science Education department at Central Washington University. Professor Egger's joint appointment reflects her research interests: her geologic research is focused on the tectonic development of the western margin of the Basin and Range province, and her geoscience education research is focused on developing curricular materials that incorporate societal issues, data, and geoscientific thinking. She has facilitated undergraduate curricular design at a variety of institutions, from reviving Stanford's undergraduate geophysics program to reflect the diverse research interests of the faculty, to developing the first Earth science undergraduate degree in Singapore at Nanyang Technological University, to redesigning the Middle-Level Science Teaching major at CWU. Through NAGT, she has led and co-led a series of workshops about teaching introductory courses. In addition, she led the effort at CWU to develop a new set of introductory science courses that integrate science and pedagogy for future teachers, using the Next Generation Science Standards as a guiding document.
Carolyn Eyles, Geography and Earth Sciences, McMaster University
Carolyn Eyles is the Director of the Integrated Science Program and a Professor in the School of Geography & Earth Sciences at McMaster University. She holds a B.Sc. in Environmental Sciences from the University of East Anglia, a postgraduate certificate of Education from the University of Newcastle upon Tyne, and an M.Sc. and Ph.D. in geology from the University of Toronto. Her research interests lie in the fields of glacial sedimentology and environmental geology, and she has worked extensively in Alaska, Australia, Brazil, Norway, Great Britain and Canada. She has over 75 publications in peer-reviewed journals and books and has co-authored two first year geoscience textbooks. Dr. Eyles is a practicing Professional Geoscientist of Ontario (P.Geo), and is a member of the Geological Society of America, the American Geophysical Union, and the American Geological Institute. Dr. Eyles is a 3M National Teaching Fellow and has won numerous teaching awards including an OCUFA Teaching Award, an Ontario Undergraduate Student Alliance Teaching Award, and the McMaster President's Award for Excellence in Instruction. Her current teaching duties include Earth Science components of interdisciplinary courses in the Integrated Science program, a first year course 'Earth & the Environment', and senior/graduate level courses in glacial sedimentology. She chaired the committee that designed and developed the interdisciplinary Honours B.Sc. Integrated Science Program and now serves as the program Director.
Sarah Fortner, Geology/Environmental Sciences, Geology/ESCI, Wittenberg University
Sarah Fortner is an Associate Professor of Geology and Environmental Science at Wittenberg University. Her students work with community experts on issues of food security, soil sustainability, environmental pollution, & water health. She has created teaching resources hosted by SERC including an InTeGrate soil module, an earth advocacy module, InTeGrate webinars, and a sustainability implementation program website. Her expertise also include interdisciplinary program development and evaluation (Wittenberg's InTeGrate Sustainability Implementation Effort, First Year Experience Program, and the Wittenberg Commitment to Engaged Learning). She served on the workshop committee for the National Academies Workshop on Service-learning in the Undergraduate Geosciences.
David Gosselin, Professor of Earth Science in the School of Natural Resources (SNR) at the University of Nebraska-Lincoln
Dr. Gosselin completed a Ph.D at the School of Mines and Technology in Rapid City, S.D where he had the opportunity to investigate Archean rocks and work on planetary materials. Dr. Gosselin's current research focuses on Earth and environmental education, workforce and leadership issues, sustainability education, ground water quality and quantity issues and the application of geochemistry to understanding water systems. In his capacity as the Director of the Environmental Studies program, Dr. Gosselin currently serves on the executive committee of the Council of Environmental Deans and Directors, a program of the National Council for Science and the Environment.
Richard Gragg, School of the Environment, Florida A&M University
Richard D. Schulterbrandt Gragg III, Ph.D. is a Professor of Environmental Science and Policy in the Florida A&M University School of the Environment. His teaching, research and service interests include: environmental justice and health disparities; environmental and sustainability science; community based participatory research; and environmental and public health policy. He also directs undergraduate and graduate students in thesis and dissertation research. Professor Schulterbrandt Gragg is currently serving the Office of Pesticide Programs for the Pesticide Program Dialogue Committee. He is the founding director of the Florida A&M University Center for Environmental Equity and Justice and a former member of the US EPA Science Advisory Board for the Environmental Justice Technical Group Review Panel, Audubon of Florida Board of Directors, the Florida Environmental Regulations Commission, and the US Environmental Protection Agency, National Environmental Justice Advisory Council and Health and Research Subcommittee. Dr. Gragg is also President and CEO of the Public Private Partnership for Sustainable Communities. Dr. Gragg was awarded a Biochemistry B.S., 1980, from the SUNY Binghamton University and a Pharmacology M.S., 1986 and a Pharmaceutical Sciences Ph.D., 1994, from the Florida A&M University.
Deborah Gross, Chemistry, Carleton College
Deborah Gross is a Professor of Chemistry at Carleton College. She is also involved in the Environmental Studies program. Her research interests focus on measurement of the chemical composition of atmospheric particulate matter using a variety of techniques. She was instrumental in designing the FOCUS program at Carleton College and has run it since its inception in 2007.
Jennifer Hanselman, Biology, Westfield State University
Jennifer Hanselman serves as the academic advisor for biology education students and as a member of the Teacher Education Council (TEC) and its graduate sub-committee (TEC-GC). She is frequently conducting outreach in K-12 schools on ecological topics, especially climate change. In addition, she partners with Westfield State's Center for Teacher Education and Research (CENTER) to offer teacher workshops. She presents on pedagogical topics such as shifting lessons toward inquiry, teaching about science misconceptions, and connecting the Next Generation Science Standards to the Common Core.
Sara Harris, Earth, Ocean, & Atmospheric Sciences, University of British Columbia
Sara Harris is a Professor of Teaching in the department of Earth, Ocean, and Atmospheric Sciences at the University of British Columbia (UBC) and a 2015 3M National Teaching Fellow. Since 2007, she has been a Departmental Director for the Carl Wieman Science Education Initiative at UBC, a major effort to improve undergraduate learning in science by implementing evidence-based, student-focused pedagogy. She has a PhD in oceanography from Oregon State University and a research background in paleoceanography and paleoclimate. During seven years as a chief scientist at Sea Education Association in Woods Hole, Massachusetts, she studied modern oceans and sailed thousands of miles with undergraduate students. Sara's current research explores how people learn climate science. She is a co-author of Understanding Climate Change: Science, Policy, and Practice.
Cynthia Hewitt, Sociology, Morehouse College
Cynthia Hewitt Ph.D. is an associate professor of sociology at Morehouse College, International Affairs and Sustainability and Environmental Studies. Her Ph.D. is from Emory University. Her research interests are on the International Political Economy of Entrepreneurship and Racial Inequality in the Ownership of Capital, Pan-Africanism and Development, and Globalization, with a focus on the impact of culture and social norms. Area studies of Ghana, Guinea, Jamaica, and U.S. Black Belt Cities (such as Atlanta).
Meghann Jarchow, Sustainability Program, Biology/Sustainability, University of South Dakota
Meghann Jarchow is an assistant professor of sustainability at the University of South Dakota. She coordinates and teaches the core courses for the undergraduate sustainability major at USD. Her research interests are in prairie ecology, agroecology, managed prairie systems, and bioenergy cropping systems. My academic training is in plant ecology and sustainable agriculture.
Michelle Kinzel, San Diego Mesa College and Southwestern College
Michelle Kinzel holds an M.S. in Geography from Oregon State University, and a B.S. in Biology from San Diego State University. Her graduate work included research on 'Using Geovisualizations in Education' http://marinecoastalgis.net/michelle09 and the completion of a Graduate Science Certificate in GIScience. She currently creates curriculum and training materials for educators and conservation workers. She teaches GIS, Remote Sensing and Physical Geography at San Diego Mesa College http://www.sdmesa.edu/students/academic-programs/gis/ and Southwestern College in San Diego, Ca.
Kaatje Kraft, Whatcom Community College
Kaatje Kraft is an assistant professor of geology at Whatcom Community College in Bellingham, WA. Prior to moving to WA, she was a professor of geology at Mesa Community College and completed her Ph.D. in Science Education examining affective factors that influence student persistence in introductory geoscience courses, particularly focusing on student motivation and use of self-regulatory strategies at two-year colleges. Kaatje was a part of the Geoscience Affective Research NETwork project GARNET and was able to observe many introductory geology courses across the country as part of that research in an effort to better understand how classroom instruction impacts student learning and affect. Kaatje has participated in and facilitated many Cutting Edge, Integrate and other NAGT-supported workshops over the past 10+ years.
Heather Macdonald, Geology, College of William and Mary
Heather Macdonald is a professor at the College of William and Mary. Her research interests are in Geoscience education, faculty professional development, geoscience in two-year colleges, and teacher education. She is a leader of the Faculty as Change Agents: Transforming Geoscience Education in Two-year Colleges project and the On the Cutting Edge project.
David Matty, Professor and Dean of the College of Science, Weber State University
Dr. Matty serves as the Dean of the College of Science at Weber State University—an open enrollment, multi-mission (community college/baccalaureate/masters) institution. As Dean since 2011, Dr. Matty has been involved with the planning and design of a new science building, and with facilitating a variety of activities that include faculty professional development, reimagining undergraduate education, increasing diversity, and enhancing external grant activity. Previously, Dr. Matty was the Program Director in the National Science Foundation's Division of Undergraduate Education, and served as chair of Central Michigan University's Earth and Atmospheric Sciences Department for nine years. Dr. Matty's research areas involve igneous/metamorphic petrology and geochemistry.
Dave Mogk, Department Head, Professor of Geology, Montana State University
Dave Mogk is a metamorphic petrologist by training with long-term research interests in evolution of Archean continental crust in SW Montana, and in mid-crustal petrogenetic procescesses (migmatite formation). He has also worked on the surface chemistry of minerals using a variety of spectroscopic methods (Auger and X-ray photoelectron spectroscopy, Time-of-Flight SIMS), life in extreme environments (Lake Vostok ice core, Yellowstone acid-sulfate hot springs), and fluid inclusions of submarine hydrothermal systems. His interests in geoscience (and STEM) education began in 1992 in response to reading Project 2061 Science for All Americans (AAAS, 1989). His first NSF/CCD project was to develop an Environmental Geology Course Using a Question-Asking Problem-Solving approach. He subsequently served as Program Officer at NSF in the Division of Undergraduate Education (1995-96). Since that time he has been involved with: teacher preparation (Collaboratives for Excellence in Teacher Preparation); digital libraries (co-author of the DLESE Community Plan and the NSDL Pathways to Progress plans); geo-ed community-building events (Teaching Mineralogy workshop; Scrutiny of Undergraduate Geoscience Education; Shaping the Future of Undergraduate Geoscience Education; Using Data in the Classroom); discipline-based education research (Bringing Research on Learning to the Geosciences; co-editor Earth and Mind; NRC report 2012). He is the recipient of the 2000 AGU Award for Excellence in Geophysics Education. He has also served on NSF Committees of Visitors, EarthScope Science and Education Committee, EarthChem Advisory Board, GSA Chair of Education Division and Education Committee, Associate Editor GSA Bulletin and American Mineralogist. He was recently appointed as Head of the Dept. of Earth Sciences at Montana State University.
Rod Parnell, Professor of Earth Sciences and Environmental Sustainability, Northern Arizona University
Dr. Parnell is currently coordinator of academic sustainability programs (coordinating the environmental and sustainability academic programs and courses across campus), past chair of the Environmental Caucus, and Professor of Earth Sciences and Environmental Sustainability at Northern Arizona University. His current research focuses on the application of biogeochemistry and geomorphology to the sustainable management of river systems in the Western US, and on the transformation of environmental curricula to incorporate more sustainability. As the founding director of the Colorado Plateau Cooperative Ecosystems Studies Unit, Dr. Parnell has worked to integrate federally funded environmental research across the Colorado Plateau. His perspectives on environmental and sustainability education come primarily from activities as a faculty member at a mid-sized comprehensive state university with a strong commitment to the Colorado Plateau region and the education of 1st generation and Native American students from across North America.
Ginny Peterson, Associate Professor and Head Department of Geology, Grand Valley State University
Dr. Peterson is currently the head of the Geology Department at Grand Valley State University and was previously a faculty member at Western Carolina University. Both are primarily undergraduate regional comprehensive institutions. At both institutions she engaged in substantive curricular revision, informed by valuable external consultation, including a visiting workshop a couple of years ago. Dr. Peterson's current research in the southern Appalachians is focused on the origin and emplacement of mafic and ultramafic rocks and the nature, conditions, and timing of movement within high strain zones. She is passionate about effectively engaging undergraduates in significant research and implementing and promoting effective pedagogy through course and curriculum design.
Joan Ramage, Earth & Environmental Sciences, Lehigh University
Joan Ramage is an Associate Professor of Earth and Environmental Sciences at Lehigh University. She is interested in ways of observing the earth and how it is changing using satellite data. Her research focuses on the cryosphere.
Dallas Rhodes, Research Associate, Department of Geosciences, Humboldt State University
After 12 years as chair of the Department of Geology and Geography at Georgia Southern University, Dallas Rhodes retired from the position in June 2010. During his tenure the number of geology and geography majors increased from fewer than 30 to more than 120. Active recruiting of new majors and a strong GIS program were among the key initiatives that helped the program grow. Dallas continues his association with Georgia Southern as an Emeritus Professor of Geology. Dallas has served as an external reviewer for several departments and he has been a member of the leadership team for workshops for new department chairs sponsored by the Council of Colleges of Arts and Sciences. His scientific interests are in tectonic geomorphology and climate change in the western US with a focus on central California. In May 2014, Dallas was appointed as a Research Associate in the Department of Geosciences at Humboldt State University.
Gigi Richard, Physical and Environmental Sciences, Colorado Mesa University
Gigi Richard is a professor of geology at Colorado Mesa University. Her research interests are in hydrology and Water Resources, human interactions with river systems, historic channel adjustments & lateral migration, GPS/GIS applications, and sediment transport and fluid mechanics.
Randy Richardson, Professor, Department of Geosciences, University of Arizona
Randy Richardson's research interests have included the dynamics of plate tectonics, from the driving mechanism to mountain building and strain accumulation and release on plate boundaries. He has also held a series of administrative positions, from associate dean to vice president to interim department head, where he has developed interests in science education (especially quantitative literacy), faculty development, and helping geoscience departments be successful in uncertain times on issues ranging from program reviews to recruiting and retaining students.
Catherine Riihimaki, Council on Science and Technology, Princeton University
Catherine Riihimaki is the associate director of science education on the Council for Science and Technology at Princeton University. She works with faculty to transform their courses using pedagogical best practices. Her geoscience research focuses on how physical landscapes change through time, particularly in the context of climate change.
Walt Robinson, Professor and Head, Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University
Walt Robinson's research interests have included the dynamics of the atmosphere and climate, Dr. Robinson has developed and taught courses in Earth-system science and modeling, as well as weather, climate, and fluid dynamics. As the head of a large and intellectually diverse geosciences department, he thinks a lot about the tension between the focused interests of students in geology, meteorology, and marine science and the importance of a broad understanding of Earth systems. He is also very interested in how we can do better helping our students develop the math and computing skills nearly all of them will need.
Mary Savina, Professor, Department of Geology, Carleton College
Mary Savina is Charles L. Denison Professor of Geology at Carleton College. For three years, she also served as Coordinator of the Perlman Center for Learning and Teaching and Faculty Assessment Coordinator. She has given numerous workshop and conference presentations about geoscience department curricula and assessment; has worked with middle school, high school and college geoscience and environmental studies faculty; and serves on the steering committee for the Building Strong Geoscience Departments initiative. She has also served on external review teams for nine geoscience and environmental studies programs and learning and teaching centers.
Cindy Shellito, Earth and Atmospheric Sciences, University of Northern Colorado
Cindy Shellito is an associate professor at the University of Northern Colorado in Greeley, CO. Her primary research interests are in modeling deep-time paleoclimate and geoscience education. She teaches courses focusing on themes ranging from paleoclimatology and global climate dynamics to mesoscale meteorology.
Constance Soja, Professor of Geology, Colgate University
Dr. Soja earned her PhD at the University of Oregon in Eugene. Her passion is paleontology, specifically ancient reefs and their paleobiogeographic implications in terrane analysis. Her work with undergraduate students on the geology of southeastern Alaska (Alexander terrane) and Mongolia's Gobi Desert led to related field research in the Ural Mountains, western Siberia, and north Queensland. Dr. Soja directs Colgate's First-Year Seminar, Core Distinction, and High Distinction programs and has held annual workshops on pedagogy. In addition, she offers paleontology workshops (on fossils, dinosaurs, biomimicry applications) to teachers and also designed "Junior Paleontologist" activities for local elementary students. She is the recipient of Colgate's Professor of the Year award and was honored in 2013 with a Denison University Alumni Citation.
Rachel Teasdale, Geological and Environmental Sciences, California State University, Chico
Rachel Teasdale is an associate professor of geology and environmental sciences at California State University–Chico. She is a leader on the RTOP project. Her research interests are in physical volcanology and igneous petrology.
Joshua Villalobos, Geological Sciences, El Paso Community College
Joshua Villalobos was recently appointed as an Instructional Campus Dean at El Paso Community College (EPCC) supervising multiple instructional programs included Geological Sciences and other STEM disciplines. During his time as a faculty member at EPCC he helped initiate several programs targeting community college students to get engaged within the geological sciences. His focus has also encompassed innovative pedagogy in the classroom and has co-authored a SERC InTeGraTe Module introducing the concept of Environmental Justice into introductory geoscience classes. He was also recently awarded the 2016 Geological Society of America Geoscience Education Division's Biggs Award for Excellence in Earth Science Teaching.
Karen Viskupic, Geosciences, Boise State University
Karen Viskupic is a Assistant Research Professor and Education Programs Manager at Boise State University. Her research interests are in the field of geoscience education at the K-12, undergraduate and graduate levels. She is a leader of the RTOP project.
Gary Weissmann, Professor, Department of Earth and Planetary Sciences, University of New Mexico
As the Albert and Mary Jane Black Family Professor of Hydrology at UNM, Professor Weissmann teaches and conducts research in the fields of applied sedimentology and hydrology. His research interests have included understanding how fluvial sediments fill sedimentary basins, ultimately becoming the beautiful sedimentary successions of places like the Badlands, Ghost Ranch of New Mexico, and the Petrified Forest and Painted Desert of Arizona. The aesthetics of modern rivers (especially as seen from space) and fluvial rocks capture his imagination and curiosity, and he strives to share his wonder of this beauty with his students. Professor Weissmann also serves on the UNM Diversity Council, and is extremely interested in issues surrounding diversity in science and academia.
Karl Wirth, Macalester College
Karl Wirth is an Associate Professor in the Geology Department at Macalester College. He teaches courses in mineralogy, petrology, and planetary geology. His main research interests are in metacognition, metadisciplinary skills, and assessing student learning in the geosciences.
Cheryl Young, Heritage University
Cheryl Young is a geoscientist with expertise in curriculum development and alignment to Next Generation Science Standards. In her current position at Heritage University (HSI), she provides professional development to STEM in-service and pre-service teachers in high-needs, rural school districts of south central WA state. Cheryl's geoscience research areas are microbiology of the terrestrial subsurface, sandstone diagenesis, and the petrophysical properties of porous media.