John T. Andrews

John T. Andrews CV

Professor Emeritus, Senior Fellow

  • Professor Emeritus Geological Sciences



  • DSc: Nottingham University, 1978
  • PhD: Nottingham University, 1965
  • MSC: McGill University, 1961
  • BA: Nottingham University, 1959

Contact Information

(Office) 303 492-5183
(Fax) 303 492-6388


Quaternary and glacial geology of Arctic areas, with a particular interest in the areas around Iceland, Greenland, and NE Canada.

Research Interests

Ice sheet/glacier ocean interactions.  Study of abrupt events, such as Heinrich events, and high-resolution studies of changes in Baffin Bay, the Labrador Sea, and the Nordic Seas over the last 12,000 cal yr.  Emphasis on marine sediment archives and the use of X-ray diffraction analysis to detect changes in sediment provenance.


  • Penrose Medal, Geological Society of America, 2016
  • AAAS Fellow, American Association for the Advancement of Science, 2011
  • AGU Fellow, American Geophysical Union, 2006


Research Statement

My research centers on using sediment properties, such as grain-size and X-ray diffraction determined mineralogy, to gain an understanding of ice/ocean interactions. My research centers on the northern marginal seas which link the North Atlangtic Ocdean to the Arctic Ocean.  Hence my currently NSF-funded research is focused on the Iceland and Greenland Seas, the Irminger Basin, Baffin Bay, and the Labrador Sea.  My temporal interest is broad—the last 2-3 Ma, but in pratical terms my main interest is the last 12,000 years at a century-scale, and the last glacial cycle at a millenial scale.  I am particularly interested in the records that span the interval between the Younger Dryas cold event and the so-called Heinrich events numbers 1 to 4.  A current research interest is how these are associated with abrupt climate events within Baffin Bay and which are associated with the Innuitian and Greenland ice sheets, and the NE Laurentide Ice Sheet.  A significant fraction of my research is co-ordinated with my colleague Anne Jennings.

My research is frequently in co-operation with national and international researchers.  In particular I have strong ties with researchers in Canada, especially the GETOP group at UQAM and GSC-Atlantic.  I am currently working with Dennis Darby (Old Dominion University) on a project with Anne Jennings on the drift ice history across the Denmark Strait.  This project also involves German researchers (Ruediger Stein and Matthias Moros) and a transect of cores at 73°N from NE Greenland.  In the future I hope to work on materials collected from E and W Greenland by Camilla Andresen from the Geological Survey of Greenland.

Active Research

Research Labs and Groups

Research Projects



McCave, I. N., John T. Andrews 2019: Distinguishing current effects in sediments delivered to the ocean by ice: II. Glacial to Holocene changes in high latitude North Atlantic upper ocean flows. Quaternary Science Reviews, 223: article 105902. DOI: 10.1016/j.quascirev.2019.105902

Anne JenningsJohn T. Andrews, Cofaigh, C. O., St-Onge, G., Belt, S., Cabedo-Sanz, P., Pearce, C., Hillaire-Marcel, C., Campbell, D. C. 2018: Baffin Bay paleoenvironments in the LGM and HS1: Resolving the ice-shelf question. Marine Geology, 402(SI): 5-16. DOI: 10.1016/j.margeo.2017.09.002

Lakeman, T. R., Pienkowski, A. J., Nixon, F. C., Furze, M. F. A., Blasco, S., John T. Andrews, King, E. L. 2018: Collapse of a marine-based ice stream during the early Younger Dryas chronozone, western Canadian Arctic. Geology, 46(3): 211-214. DOI: 10.1130/G39665.1

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