Emeritus Faculty

Carr, Michael J.

  • Image

This email address is being protected from spambots. You need JavaScript enabled to view it.


Sheridan, Robert E.

  • Image
  • Position: Professor Emeritus
  • Office: Room 230 Wright Geological Laboratory
  • Phone: (848) 445-2044
  • Email: rsheridn@rci.rutgers.edu

Research Interests

For the past 35 years I have been carrying out research on the eastern North American continental margin using seismic reflection, seismic refraction, gravity, magnetics, coring, dredging, and deep-sea drilling. My research has been in areas from Canada to the Bahamas, and of different resolution scales--from the wreck of the U.S.S. Monitor to the meter-thick Holocene-Late Pleistocene sequences to the structure of the continental crust and upper mantle.

BobBob Sheridan at the recovery of the USS Monitor turret


  • Carey, J.S., Sheridan, R.E., and Ashley, G.M., 1998, Late Quaternary sequence stratigraphy of a slowly subsiding passive margin: New Jersey Continental Shelf: American Association of Petroleum Geologists Bulletin, v. 82, p. 773-791.
  • Sheridan, R.E., 1997, Pulsation tectonics as the control on the dispersal and assembly of supercontinents: Journal of Geodynamics, v. 23, p. 173-196.
  • Esker, D., Sheridan, R.E., Ashley, G.M., Waldner, J.S., and Hall, D.M., 1996, Synthetic seismograms from Vibracores: A case study in correlating the Late Quaternary seismic stratigraphy of the New Jersey inner continental shelf: Journal of Sedimentary Research, v. 60, p. 1156-1168.
  • Sheridan, R.E., Musser, D.L., Holbrook, W.S., and Glover, L., III, 1995, Geodynamics Transect E3: Mid-Atlantic Coastal Plain and Continental Margin: Basement and Mantle Structure and Continent-Ocean Transition: Geological Society of America, Centennial Continent-Ocean Transect No. E-3, p. 69-78.
  • Sheridan, R. E., Musser, D.L., Glover, L., III, Talwani, M., Ewing, J., Holbrook, W.S., Purdy, G.M., Hawman, R., and Smithson, S., 1993, Deep seismic reflection data of EDGE U.S. Mid-Atlantic continental-margin experiment: Implications for Appalachian sutures and Mesozoic rifting and magmatic underplating: Geology, v. 21, p. 563-567.

Hewins, Roger


  • B.Sc., University of Aberdeen
  • Ph.D., University of Toronto


Thin section of synthetic chondrule produced in the Rutgers furnace

Research Interests

Petrology of meteorites, experimental petrology, origin and early history of solar system. NASA grants support melting and crystallization studies on chondrules and normally provide one or two research assistanships for graduate students.


Chondrules reveal early solar system fractionation


  • Hewins R.H., Zanda B. and Bendersky C. (2012) Evaporation and recondensation of sodium in Semarkona Type II chondrules. Geochim. Cosmochim. Acta 78, 1-17.
  • Boesenberg J. and Hewins R.H. (2010) An experimental investigation into the formation of phosphoran olivine and pyroxene. Geochim. Cosmochim. Acta 74, 1923-1941.
  • Whattam, S.A., and Hewins, R.H. (2009) An origin for PO chondrules from thermally annealed granoblastic olivine aggregates. Geochim. Cosmochim. Acta 73, 5460–5482.
  • Whattam, S.A., Hewins, R.H., Cohen, B.A., Seaton, N.C. and Prior, D.J. (2008) Granoblastic olivine aggregates in magnesian chondrules: planetesimal fragments or thermally annealed solar nebula condensates? Earth and Planetary Science Letters, 269, 200-211.
  • E. J. Tronche, R. H. Hewins, and G. J. MacPherson (2007) Formation conditions of aluminum-rich chondrules. Geochim. Cosmochim. Acta 70, 3361-3381.
  • Zanda B., R. H. Hewins, M. Bourot-Denise, P. A. Bland and F. Albarede (2006) Formation of Solar Nebula Reservoirs by Mixing Chondritic Components. Earth Planet. Sci. Lett. 248, 650-660.
  • B. A. Cohen, S. Levasseur, B. Zanda, R. H. Hewins, and A. N. Halliday (2006) Kinetic isotope effect during reduction of iron from a silicate melt. Geochim. Cosmochim. Acta 70, 3139-3148.
  • Cohen, B.A., Hewins, R.H. and Alexander, C.M.O'D. (2004) The formation of chondrules by open-system melting of nebular condensates.  Geochim. Cosmochim. Acta  68, 1661-1675. Download this paper
  • R. H. Hewins and G. E. Fox (2004)  Chondrule textures and precursor grain size: an experimental study. Geochim. Cosmochim. Acta  68, 917-925. Download this paper.
  • S. Weinbruch, W. F. Müller, and Roger H. Hewins (2001) A transmission electron microscope study of exsolution and coarsening in iron-bearing clinopyroxene from synthetic analogues of chondrules. Meteoritics and Planet. Sci. 36, 1237-1428.
  • B. A. Cohen, R. H. Hewins and Y. Yu (2000) Evaporation in the young solar nebula as the origin of "just-right" melting of chondrules. Nature 406, 600-602. Download this paper.
  • R.H. Hewins (2000) A stormy nebula In Meteorites: Their Impact on Science and History (2000) Edited by Brigitte Zanda and Monica Rotaru, Cambridge University Press, 128pp., 94-101.
  • S.V. Maharaj and R.H. Hewins (1999) Simulating flash heating in a muffle tube furnace. Meteoritics & Planet. Sci. 34, 885-890.
  • Weinbruch S. and Hewins R. H. (1999) Reply to comment by J. Paque, H.C. Connolly, and G.E. Lofgren on "On the lower limit of chondrule cooling rates: The significance of iron loss in dynamic crystallization experiments", Meteoritics & Planet. Sci. 34, 673-675.
  • Connolly Jr., B.D. Jones and R.H. Hewins (1998) The flash melting of chondrules: an experimental investigation into the melting history and physical nature of chondrule precursors. Geochim. Cosmochim. Acta 62, 2725-2735. Download this paper.
  • Weinbruch S., Buttner H., Rosenhauer M. and Hewins R. H. (1998) On the lower limit of chondrule cooling rates, Meteoritics & Planet. Sci. 33, 65-74. Download this paper.
  • Hewins, R.H., Yu, Y., Zanda, B. and Bourot-Denise, M. (1997) Do nebular fractionations, evaporative losses, or both, influence chondrule compositions? Antarct. Met. Research 10, 294-317.
  • R.H. Hewins (1997) Chondrules. Ann. Rev. Earth Planet. Sci. 25, 61-83.
  • R.H. Hewins and Herzberg C.T. (1996) Nebular turbulence, chondrule formation, and the composition of the earth. Earth Planet. Sci. Lett. 144,1-7. Download this paper

Olsson, Richard K.


  • B.Sc., City College of New York
  • Ph.D., Columbia University


  • B.S., M.S., Rutgers University 
  • M.A., Ph.D., Princeton University 

Research Interests

  • Foraminiferal paleoecology and paleobathymetry; planktonic foraminiferal biostratigraphy and phylogeny of K/T boundary; sequence stratigraphy of passive margins 


  • Sugarman, P.J., Miller, K.G., Olsson, R.K., Browning, J.V., Wright, J.D., White, T.S., and De Romero, L., 1999. The Cenomanian/Turonian carbon burial event, Bass River, NJ: Geochemical, paleontological, and sea-level changes. Journal of Foraminiferal Research, v. 29, p. 438-452.
  • Miller, K.G., Barrera, E., Olsson, R.K., Sugarman, P.J., and Savin, S.M., 1999. Does Ice drive early Maastrichtian eustasy: Global d18O and New Jersey sequences. Geology, v. 27, p. 783-786.
  • Olsson, R.K., Wright, J.D., and Miller, K.G., 2001. Paleobiogeography of Pseudotextularia elegans during the latest Maastrichtian global warming event. Journal of Foraminiferal Research, v. 31, p. 275-282.
  • Pearson, P.N., Ditchfield, P.W, Singano, J, Harcourt-Brown, K.E., Nicholas, C.J., Olsson, R.K., Shackleton, N.J., and Hall, M.A., 2001. Warm tropical sea surface temperatures in the Late Cretaceous and Eocene epochs. Nature, v. 413, p. 481-487.
  • Olsson, R.K., Miller, K.G., Browning, J.D., Wright, J.D., and Cramer, B.S., 2002. Sequence stratigraphy and sea level change across the Cretaceous-Tertiary Boundary on the New Jersey passive margin. In Catastrophic Events and Mass Extinctions: Impacts and Beyond, C. Koeberl and K. G. MacLeod, eds., Geological Society of America Special Paper 356, Chapter 09, p. 97-108.

Oliver Withjack, Martha

  • Image
  • Position: Professor
  • Office: 243A Wright Geological Laboratory
  • Phone: (732) 445-6974
  • Email: drmeow3@eps.rutgers.edu


  • B.A., Rutgers University 
  • M.A., Ph. D., Brown University


  • Undergraduate: Field Geology,Structural Geology,Tectonics and Regional Structural Geology
  • Graduate: Advanced Tectonics; Acquisition, Processing & Interpretation of Seismic Reflection Data; Modeling in Structural Geology: Geometric, Experimental & Numerical

Research Interests

  • Extensional tectonics; rift-basin and passive-margin development; experimental modeling of geologic structures; seismic interpretation; petroleum geology


  • Schlische, R.W., Withjack, M.O., and Olsen, P.E., 2002, Relative timing of CAMP, rifting, continental breakup, and inversion: tectonic significance, in Hames, W.E., McHone, G.C., Renne, P.R., and Ruppel, C.R., eds., The Central Atlantic Magmatic Province: Insights from Fragments of Pangea: American Geophysical Union Monograph 136, p. 33-59. >>PDF File
  • Schlische, R.W., Withjack, M.O., and Eisenstadt, G., 2002, An experimental study of the secondary deformation produced by oblique-slip normal faulting: AAPG Bulletin, v. 86, p. 885-906.  >>PDF file
  • Ackermann, R.V., Schlische, R.W., and Withjack, M.O., 2001, The geometric and statistical evolution of normal fault systems: an experimental study of the effects of mechanical layer thickness on scaling laws: Journal of Structural Geology, v. 23, p. 1803-1819. >>PDF file
  • Clifton, A.E., Schlische, R.W., Withjack, M.O., and Ackermann, R.V., 2000, Influence of rift obliquity on fault-population systematics: results of clay modeling experiments: Journal of Structural Geology, v. 22, p. 1491-1509. >>PDF file
  • Withjack, M. O., and Callaway, J. S., 2000, Active normal faulting beneath a salt layer -- an experimental study of deformation in the cover sequence:  AAPG Bulletin, v. 84, p. 627-651. >>PDF file
  • Clifton, A.E., Schlische, R.W., Withjack, M.O., and Ackermann, R.V., 2000, Influence of rift obliquity on fault-population systematics: results of clay modeling experiments: Journal of Structural Geology, v. 22, p. 1491-1509. >>PDF file
  • Withjack, M.O., Schlische, R.W., and Olsen, P.E., 1998, Diachronous rifting, drifting, and inversion on the passive margin of central eastern North America: An analog for other passive margins: AAPG Bulletin, v. 82, p. 817-835. >>PDF File
  • Withjack, M. O., Olsen, P. E., and Schlische, R. W., 1995, Tectonic evolution of the Fundy basin, Canada: Evidence of extension and shortening during passive-margin development: Tectonics, v. 14, p. 390-405.
  • Withjack, M., Islam, Q., and LaPointe, P., 1995, Normal faults and their hanging-wall deformation--an experimental study:  AAPG Bulletin, v. 79, p. 1-18. >>PDF file
  • Eisenstadt, G., and Withjack, M., 1995, Estimating inversion--results from clay-model studies:  in Basin Inversion, Geological Society of London, Special Publication 88, p. 119-136.
  • Withjack, M., and Islam, Q., 1993, Origin of rollover--a discussion:  AAPG Bulletin, v. 77, p. 657-658.
  • Withjack, M., and Peterson, E., 1993, Prediction of normal-fault geometries--a sensitivity analysis:  AAPG Bulletin, v. 77, p. 1860-1873. >>PDF file
  • Withjack, M., Olson, J., and Peterson, E., 1990, Experimental models of extensional forced folds:  AAPG Bulletin, v. 74, p. 1038-1054.

Extensional Tectonics Working Group at Rutgers

Structural Geology and Tectonics at Rutgers (PDF file; 816 KB)