Brad Sageman

Brad Sageman

Department Chair
Email: brad at
Location: Tech F397/F399

Ph.D. Geological Sciences, University of Colorado
B.Sc. Biology, Denison University

Research Website | Personal Website


My research is grounded in stratigraphy, in particular the relationship between rocks and time.  Much of my effort has been directed at development of high-resolution time scales for ancient stratigraphic sequences through the application of cyclostratigraphic and sequence stratigraphic techniques.  The driving motivation for improved time scales builds from my other main research interest, understanding the processes controlling burial of carbon in ancient sediments and the relationships between changes in the global carbon cycle and ocean-climate interactions.  A particular emphasis of my work has been Phanerozoic ocean anoxic events and I have devoted most of my career to study of the Western Interior basin of North America.


EARTH 114: Evolution and the Scientific Method
EARTH 330: Sedimentary Geology
EARTH 331: Field Problems in Sedimentary Geology
ISEN 230 / PHIL 270: Climate Change and Sustainability: Economic and Ethical Dimensions

Selected Publications

Joo, Y.J. and Sageman, B.B., 2014, Cenomanian to Campanian Carbon Isotope Chemostratigraphy from the Western Interior Basin, Journal Sedimentary Research 84: 529-542.  

Ma, C., Meyers, S., Sageman, B., Singer, B., Jicha, B., 2014, Testing the Astronomical Time Scale for Oceanic Anoxic Event 2, and its Extension into Cenomanian Strata of the Western Interior Basin, Geol. Soc. Amer. Bull. 126: 974-989.

Sageman, B.B., Singer, B.S., Meyers, S.R., Walaszczyk, I., Seiwert, S.E., Condon, D.J., Jicha, B.R., Obradovich, J.D., and Sawyer, D.A., 2014, Integrating 40Ar/39Ar, U-Pb, and astronomical clocks in the Cretaceous Niobrara Formation, Western Interior Basin, USA, Geol. Soc. Amer. Bull. 126: 956–973. 

Du Vivier, A.D.C., Selby, D., Sageman, B.B., Gröcke, D.R., and Voigt, S., 2014, Osmium isotope dynamics during Cenomanian-Turonian OAE 2 reveal interplay of changing global seawater chemistry and circulation, Earth Planet. Sci. Letters 389: 23–33.

Sageman B.B., Lyons T.W. and Joo Y.J., 2014, Geochemistry of Fine-Grained, Organic Carbon-Rich Facies. In: Holland, H.D. and Turekian, K., eds., Treatise on Geochemistry, 2nd Edition, v. 9, Elsevier, Oxford, p. 141-179.  

Pagani, M., Huber, M., and Sageman, B., 2014, Greenhouse Climates, in Holland, H. and Turekian, K., eds.,   Treatise on Geochemistry, 2nd Edition, v. 6, Elsevier, Oxford, p. 281-304. 

Research Interests

  • Cyclostratigraphy, sequence stratigraphy, and event stratigraphy
  • Paleoecology of oxygen-deficient marine ecosystems
  • Geochemistry of fine-grained facies and sedimentary organic matter
  • Paleoclimatology/paleoceanography

Brad Sageman Photos

Morning light near Tingri, Tibet, 2007

BBS doing field work in Tibet, 2007

Prof. Hurtgen demonstrates his anti-gravity kayak exiting strategy, 2007

Sunrise over Navajo Mtn., Lake Powell, Utah, 2007

July 20, 2015