Education

Master of Science in Geology, 1990
Auburn University, AL
GPA: 3.87
Thesis title: "Paleogeography and depositional environments of the lower Mary Lee coal zone, Pottsville Formation, northwestern Alabama"

Bachelor of Science in Geosciences, 1983
The Pennsylvania State University, University Park, PA

Experience:

Postdoctoral Fellow

Morrison Research Initiative, Colorado State University, 1995

Instructor

Department of Geosciences Summer Field School, University of Arizona: 1992, 1993, 1994

Lecturer

Department of Geosciences, University of Arizona, 8/92-12/92: Geosciences 302: Sedimentology and Stratigraphy

Coordinator

Department of Geosciences Summer Field School, University of Arizona, 1/92 to 6/93: Supervisors: Dr. Mark Barton, Dr. Judy Parrish

Teaching Assistant

Department of Geosciences, University of Arizona 8/91 to 12/91: Courses: GEOS 105 Global Change, GEOS 415 Geologic Hazards, GEOS 462/562 Quaternary Paleoecology

Teaching Assistant

Department of Geosciences Summer Field School, University of Arizona, 5/91 to 6/91: Supervisor: Dr. Tim Lawton

Research Assistant

Department of Geosciences, University of Arizona, 8/90 to 5/91, 6/91 to 8/91, 1/92 to 12/94: Supervisor: Dr. Judith T. Parrish, Projects: Pangaean Paleoclimates, and Phytotaphonomy in the Upper Triassic Chinle Fo rmation

Research Assistant

Department of Geology, Auburn University, AL, 5/90-8/90: Supervisor: Dr. Charles E. Savrda, Project: Investigation of alternating limestone-marl sequences within the Cretaceous Demopolis Chalk
3/88-8/89: Supervisor: Dr. Robert A. Gastaldo, Project: Biofacies-lithofacies relationships within the Mary Lee coal zone, Upper Pottsville Formation, Alabama

Lecturer

Department of Geology, Auburn University, AL, 8/89 to 12/89: Geology 102 - Surficial Geological Processes

Teaching Assistant

Department of Geology, Auburn University, AL, 1/90-5/90: Courses: Geology 101 - Physical Geology, Geology 102 - Surficial Geological Processes, Geology 103 - Historical Geology, Geology 110 - Physical Geology for Science Majors

Geologist

P & N Coal Company Incorporated, Punxsutawney, PA, 3/84-3/88: Supervised exploration, surface and groundwater monitoring, mine drainage treatment, and geochemical analysis of overburden

Awards

Chevron Field Scholarship

University of Arizona, 1993

Charles Eversen Scholarhip

Unversity of Arizona, 1992

Outstanding Graduate Student

Auburn University, 1989-1990

Sigma Xi, Meritorious Research Award

Auburn University, 1990

Best Student Paper

Geology Section, Alabama Academy of Science, 1990

Honor Society Affiliations

• Sigma Xi, Research Honor Society, elected 1990
• Sigma Gamma Epsilon, Earth Science Honor Society, elected 1988

Professional Society Affiliations

• Geological Society of America, Member, 1986-1991
• American Association of Petroleum Geologists, Member, 1984-1991
• American Geophysical Union, Student Member, 1989-1991
• Society of Mining and Exploration, Junior Member, 1984-1990

Professional Service

• Graduate Admissions Committee, Spring 1994, graduate student representative
• Faculty Search Committee, Spring 1992, graduate student representative

Invited Lectures

• USGS /Northern Arizona University Department of Geology Lecture Series, Fall 1994: Sticks and mud: Plant taphonomy, fluvial sedimentology, paleopedology, and paleoclimatology in the Upper Triassic Chinle Formation

Publications

Papers

• Demko, T. M., 1990, Depositional environments of the lower Mary Lee coal zone, Pottsville Formation: in Gastaldo, R. A., Demko, T. M., and Liu, Y., eds., Carboniferous coastal communities of the Mary Lee coal zone, Marion and Walker Counties, Alabama: Geological Society of America, Southeastern Section Field Trip Guidebook IV, p. 4-18.

• Demko, T.M., and Gastaldo, R.A., 1992, Paludal environments of the Mary Lee coal zone, Pottsville Formation, Alabama: Stacked clastic swamps and peat mires: International Journal of Coal Geology, v. 20, p. 23-47.

• Demko, T.M., and Gastaldo, R.A., in press, Allocyclic and autocyclic influences on the deposition of the Mary Lee coal zone and associated marine strata, Warrior basin, Alabama: International Journal of Coal Geology.

• Demko, T.M., and Parrish, J.T., in press, Paleoclimatic setting of the Morrison Formation: Geological Society of America Special Paper.

• Eble, C.F., Gastaldo, R.A., Demko, T.M., and Liu, Y., 1994, Coal compositional changes along a mire interior to mire margin transect in the Mary Lee coal bed, Warrior basin, Alabama, USA: International Journal of Coal Geology, v. 26, p. 43-62.

• Gastaldo, R. A., Demko, T. M., and Liu, Y., 1991, A mechanism to explain persistent alternation of clastic and peat-accumulating swamps in Carboniferous sequences: Societe Geologique Francais Bulletin, t. 162, no. 2, p. 299-305.

• Gastaldo, R.A., Demko, T.M., and Liu, Y., 1993, Application of sequence and genetic stratigraphic concepts to Carboniferous coal-bearing strata - an example from the Black Warrior basin, USA: Geologishe Rundschau, v. 82, p. 212-226.

• Gastaldo, R. A., Demko, T. M., Liu, Y., Keefer, W. D., and Abston, S. L., 1989, Biostratinomic processes for the development of mud-cast logs in Carboniferous and Holocene swamps: Palaios, v. 4, p. 356-365.

• Hasiotis, S.T., and Demko, T.M., in press, Continental ichnofossils associated with the Felch Quarry sandstone in the Morrison Formation, Garden Park Paleontological Area, Ca–on City, CO: Geological Society of America Special Paper.

• Parrish, J.T., Demko, T.M., and Tanck, G.S., 1993, Sedimentary paleoclimatic indicators: What they are and what they tell us: Philosophical Transactions of the Royal Society, London, V. 344, p. 21-25.

• Savrda, C.E., Ozalas, K., Demko, T.M., Huchison, R.A., and Scheiwe, T.D., 1993, Log-grounds and the ichnofossil Teredolites in transgressive deposits of the Clayton Formation (Lower Paleocene), western Alabama: Palaios, v. 8, p. 311-324.

Recent Abstracts

• Demko, T.M., 1994, Comparative plant taphonomy in the Upper Triassic Chinle Formation, Colorado Plateau region: Geological Society of America Abstracts with Programs, v. 26, no. 7, p. A298-299.

• Demko, T.M., 1994, Candy-striped Teepees: Sedimentology and plant taphonomy of a channel-levee-crevasse complex, Petrified Forest National Park, Arizona: Geological Society of America Abstracts with Programs, v. 26 no. 6 p. A10-11.

• Demko, T.M., Jirikowic, J.L., and Gastaldo, R.A., 1991, Tidal cyclicity in the Pottsville Formation, Warrior basin, Alabama: Sedimentology and time-series analysis of a rhythmically laminated sandstone-mudstone interval: Geological Society of America Abstracts with Programs, v. 23, no. 5, p. A287.

• Demko, T. M., and Gastaldo, R. A., 1990, Paleotopographic control of deposition in the Mary Lee coal zone, "Pottsville" Formation, Warrior basin, northwestern Alabama: Geological Society of America Abstracts with Programs, v. 22, no. 4, p. 11.

• Demko, T.M., and Gastaldo, R.A., 1990, Preservation of daily tidal cycles and stacked alluvial swamp deposits: Depositional response to early compaction of buried peat bodies: American Association of Petroleum Geologists Bulletin, v. 74, p. 256.

• Demko, T.M., and Gastaldo, R.A., 1989, An Early Pennsylvanian, tide-influenced mud flat, Warrior basin, Alabama: Sedimentology, ichnology, and preservational mechanisms: Geological Society of America Abstracts with Programs, v. 21, no. 6, p. A52.

• Demko, T.M., Liu, Y., Keefer, W.D., Abston, S.L., and Gastaldo, R.A., 1988, Biostratinomic processes for the development of mud cast logs: A means for identifying alluvial swamp facies in the stratigraphic record: Geological Society of America Abstrac ts with Programs, v. 20, no. 7, p. A264.

• Riggs, N.R., Demko, T.M., Dubiel, R.F., Hasiotis, S.T., Ash, S.R., and May, C.L., 1994, Distal effects of volcanism on fluvial sedimentation, Upper Triassic Chinle Formation, Arizona: Geological Society of America Abstracts with Programs, v. 26, no. 7 , p. A68.

Active Research Projects

Morrison Research Intitiative

National Park Service and Colorado State University

Plant taphonomy, fluvial sedimentology, and paleoclimatology in the Upper Triassic Chinle Formation

dissertation project

Stable isotope geochemistry of pedogenic carbonate and organic material from the Upper Triassic Chinle Formation

collaboration with Dr. Jay Quade, University of Arizona, and John Pekala, University of South Florida

Population structure reconstruction of lingulid brachipods from trace fossils

collaboration with Michal Kowalewski, University of Arizona

Sequence and genetic stratigraphy of Carboniferous rocks in the Warrior basin, Alabama

collaboration with Dr. Robert Gastaldo, Auburn University

Permian paleosols associated with the Jellybean conglomerate, Earp Formation, southeastern Arizona

collaboration with Dr. Joseph Schreiber, University of Arizona

Continental trace fossils in Mesozoic rocks on the Colorado Plateau

collaboration with Stephen Hasiotis, University of Colorado/USGS, and Russell Dubiel, USGS

Revised stratigraphy and geologic mapping of Petrified Forest National Park

National Park Service, and collaboration with Russell Dubiel, USGS, and Dr. Nancy Riggs, Northern Arizona University

Effects of catastrophic ash fall on fluvial sedimentation in the Upper Triassic Chinle Formation

collaboration with Dr. Nancy Riggs, Northern Arizona University, Russell Dubiel, USGS, Stephen Hasiotis, University of Colorado/USGS, Sidney Ash, Weber State Universty, and Cathleen May, University of California, Berkeley

---

Back to Morrison Research Initiative Home Page