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Keller Home
 

Gerta Keller
Professor of Geosciences (Paleontology)

Department of Geosciences
308 Guyot Hall
Princeton University
Princeton, NJ 08544

Phone: (609) 258-4117
E-Mail:

The Chicxulub Debate

Chicxulub Evidence at Brazos, Texas

The Non-Smoking Gun
(Geological Society London)

The Non-Smoking Gun - DEBATE (Geological Society London)
1995 Ward, W. C., Keller, G., Stinnesbeck, W., and Adatte, T., 1995. Yucatan subsurface stratigraphy: Implications and constraints for the Chicxulub impact. Geology, 23:873-876.

1995 Keller, G., Li, L. and MacLeod, N., 1995. The Cretaceous/Tertiary boundary stratotype section at El Kef, Tunisia: How catastrophic was the mass extinction? Paleogeogr., Paleoclimatol., Paleoecol., 119: 221-254. PDF

1996 Adatte, T., Stinnesbeck, W. and Keller, G., 1996. Lithostratigraphic and mineralogical correlations of near-K/T boundary clastic sediments in NE Mexico: Implications for origin and nature of deposition. Geol. Society Amer., Special Paper 307, p. 211-226.

1996 Keller, G., 1996. The K/T mass extinction in planktic foraminifera biotic constraints for catastrophe theories. In, MacLeod, N. and Keller, G. (eds.), The Cretaceous-Tertiary mass extinction: Biotic and environmental events, Norton Press, New York, p. 63-100.

1996 Keller, G. and Stinnesbeck, W., 1996. Sea level changes, clastic deposits and megatsunamis across the Cretaceous-Tertiary boundary. In, MacLeod, N., and Keller, G. (eds.), The Cretaceous-Tertiary mass extinction: Biotic and environmental events, Norton Press, New York, p. 415-450.

1996 Keller, G., and Stinnesbeck, W., 1996. Near-K/T age of clastic deposits from Texas to Brazil: impact, volcanism and/or sea-level lowstand? Terra Nova, 8: 277-285.

1996 Lopez-Oliva, J. G., and Keller, G., 1996. Age and stratigraphy of near-K/T boundary clastic deposits in NE Mexico. Geol. Soc. Amer., Special Paper 307. p. 227-242.

1996 Lu, G., and Keller, G., 1996. Separating ecological assemblages using stable isotope signals: late Paleocene to early Eocene planktic foraminifera, DSDP Site 577, J. Foram. Res., 26(2): 103-112.

1996 Lu, G., Keller, G, Adatte, T., Ortiz, N., and Molina, E., 1996. Long-term (105) or short-term (103) d13C excursion near the Paleocene-Eocene transition: evidence from the Tethys. Terra Nova, 8:347-355.

1996 Pardo, A., Ortiz, N. and Keller, G., 1996. Latest Maastrichtian and K/T boundary foraminiferal turnover and environmental changes at Agost, Spain. In, MacLeod, N. and Keller, G., (eds.), The Cretaceous-Tertiary Mass Extinction: Biotic and Environmental Effects, Norton Press, New York, p. 157-191.

1996 Stinnesbeck, W. and Keller, G., 1996. Environmental changes across the Cretaceous-Tertiary boundary in northeastern Brazil. In, MacLeod, N. and Keller, G., (eds.), The Cretaceous-Tertiary Mass Extinction: Biotic and Environmental Effects, Norton Press, New York, p. 451-470.

1996 Stinnesbeck, W., Keller, G., Adatte, T., Lopez-Oliva, J. G. and MacLeod, N., 1996. Cretaceous-Tertiary boundary clastic deposits in NE Mexico: Bolide impact or sea-level lowstand? In, MacLeod, N. and Keller, G., (eds.), The Cretaceous-Tertiary Mass Extinction: Biotic and Environmental Effects, Norton Press, New York, p. 471-518.

1996 Stinnesbeck, W. and Keller, G., 1996. K/T boundary clastic deposits in NE Mexico and NE Brazil: Evidence for megatsunamis or sea-level changes? Geol. Soc. Amer. Special Paper 307, p. 197-210.

1996. Vicenzi, V., G. Keller and W. Stinnesbeck, 1996. Glass in near-K/T boundary Mexican sediments” A microanalytical study. Geol. Soc. France, Paris, Dec. 2-3.

1997 Keller, G., Adatte, T., Hollis, C., Ordõnez, M., Zambrano, I., Jiménez, N., Stinnesbeck, W., Aleman, A., and Hale-Erlich, W., 1997. High-latitude response to the K/T boundary event in Ecuador. Marine Micropaleontology,

1997 Keller, G., Lopez-Oliva, J. G., Stinnesbeck, W., and Adatte, T., 1997. Age, stratigraphy and deposition of near-K/T siliciclastic deposits in Mexico: Relation to bolide impact? Geol. Soc. Amer. Bull., 109: 410-428.

1997 W. Stinnesbeck, G. Keller, J, De La Cruz, C. De León, N. MacLeod, J.E. Whittacker, 1995. The Cretaceous-Tertiary boundary in Guatemala: limestone breccia deposits from the South Peten Basin, Geologische Rundschau, v. 86: 686-709.
l977 Pardo, A., Keller, G., Molina, E and J.I. Canudo, l997. Planktic foraminiferal turnover across the Paleocene-Eocene transition at DSDP Site 401, Bay of Biscay, North Atlantic. Marine Micropaleontology, 29: 129-158.

1998 Bolle, M.-P., Adatte, T., Keller, G., v. Salis, K., and Hunziker, J., l998. Stratigraphy, mineralogy and geochemistry of the Trabakua Pass and Ermua sections in Spain: Paleocene-Eocene transition. Ecologae Geol. Helv. v. 91: 1-25.

1998 Li, L., and Keller, G., l998. Maastrichtian climate, productivity and faunal turnovers in planktic foraminifera in South Atlantic DSDP Sites 525A and 21, Marine Micropaleontology, 33: 55-86. PDF Version

1998 Keller, G., Li, L., Stinnesbeck, W., and Vicenzi, E., l998. The K/T mass extinction, Chicxulub and the impact-kill effect. Geol. Soc. France, 169940: 485-491.

1998 Keller, G., Adatte, T., Stinnesbeck, W., Stuben, D., Kramar, U., Berner, Z., Li, L. and K. von Salis Perch-Nielsen, l998. The Cretaceous-Tertiary transition on the shallow Saharan Platform in southern Tunisia. GeoBios, v. 30,7: 951-975.
1998 Li, L. and Keller, G., l998. Diversification and extinction in Campanian-Maastrichtian planktic foraminifera of northwestern Tunisia. Eclogae Geol. Helv., 91: 75-102.

1998 Oberhänsli, H., Keller, G., Adatte, T., and Pardo, A., l998. Environmentally and diagenetically controlled changes across the K/T transition at Koshak, Mangyshlak (Kazakhstan). Geol. Soc. France, 169(4): 493-501.

1998 Lu, G., Adatte, T., Keller, G., and Molina, E., l998. Abrupt climatic, oceanographic and ecologic changes near the Paleocene-Eocene transition in the deep Tethys basin, Ecologae Geol. Helv., 91: 293-306.

1998 Lu, G., Keller, G. and Pardo, A., l998. Stability and change in Tethyan planktic foraminifera across the Paleocene-Eocene transition. Marine Micropaleontology 35: 203-233.

1998 Li, L., and Keller, G., l998. Abrupt deep-sea warming at the end of the Cretaceous. Geology, 26(11): 995-998.
1999 Bolle, M-P., Adatte, T., Keller, G., von Salis Perch-Nielsen, K., and Burns, S., 1999. Climate and sea level fluctuations during the Paleocene-Eocene transition in Tunisia. Bull., Geol. Soc. France, 170(5):661-680.

1999 Pardo, A., Keller, G., and Oberhansli, H., 1999. Paleoecologic and Paleoceanographic evolution of the Tethyan realm during the Paleocene-Eocene transition, J. Foram. Res. 29(l): 37-57.

1999 Remane, J. Keller, G., Hardenbol, J. and M. Ben Haj Ali, l999. Report on the International Workshop on Cretaceous-Paleogene Transitions, Episodes, 22(1):47-48.

1999 Li , L., Keller, G., and Stinnesbeck, W., 1999. The late Campanian and Maastrichtian in northwestern Tunisia: Paleoenvironmental inferences from lithology,macrofauna and benthic foraminifera. Creteaceous Research, 20: 231-252. PDF Version

1999 Li, L. and Keller, G., l999. Variability in Late Cretaceous climate and deep waters: Evidence from stable isotopes. Marine Geology, 161: 171-190. PDF Version

1999 Pardo, A. and Keller, G. (1999): Aspectos paleoceanográficos y paleoecológicos del límite Cretácico/Terciario en la Península de Mangyshlak (Kazakstan): inferencias a partir de foraminíferos planctónicos. Rev. Esp. Micropal. 31 nš 2

1999 Stinnesbeck, W., Keller, G. Adatte, T., Stueben, D., Kramar, U., Berner, Z., Desremeaux, C., and Moliere, E., 2000. Belox, Haiti, revisited: multiple events across the Cretaceous-Tertiary transition in the Caribbean? Terra Nova, v. 11: 303-310.

2000 Keller, G. and Stinnesbeck, W. 2000. Iridium and the K/T boundary at El Caribe,Guatemala. International Journal of Earth Sciences 88, p. 840-843. PDF Version.

2000 Li, L., Keller, G., Adatte, T. and W. Stinnesbeck, 2000.Late Cretaceous sea-level changes in Tunisia: a multi-disciplinary approach. Journal of Geological Society, London, 157:447-458. PDF Version

2000 Bolle, M.-P., Pardo, A., Hinrichs, K.U., Adatte, T., von Salis, K., Burns, S., Keller, G., and Muzylev, N., 2000. The Paleocene-Eocene transition in the marginal northeastern Tethys (Kazakhstan and Uzbekistan. In. J. Earth Sci, 89, 390-414.

2001 Stinnesbeck, W., P. Schulte, F. Lindenmaier, T. Adatte, M. Affolter, L. Schilli, G. Keller, D. Stueben, Z. Berner, U. Kramer, S. Burns, and J.G. Lopez-Oliva, 2001. Late Maastrichtian age of spherule deposits in northeastern Mexico: implications for Chicxulub scenario. Canadian Journal of Earth Sciences, 38, 229-238.

2001 Keller, G., T. Adatte, W. Stinnesbeck, D. Stueben and Z. Berner, 2001. Age, chemo- and biostratigraphy of Haiti spherule-rich deposits: a multi-event K-T scenario. Canadian Journal of Earth Sciences, 38, 197-227.

2001. Keller, G., 2001. The end-Cretaceous Mass Extinction: Year 2000 Assessment. J. Planetary and Space Science, 49,817-830. PDF Version

2001. Keller, G., Q. Han, T. Adatte, and S.J. Burns, in 2001. Paleoenvironment of the Cenomanian-Turonian transition at Eastbourne, England. Cretaceous Research, 22, 391-422. PDF Version

2001. Tantawy, A.A., Keller, G., Adatte, T., Stinnesbeck, W., Kassab, A., and Schulte, P., 2001. Maastrichtian to Paleocene (Dakhla Formation) depositional environment of the Western Desert in Egypt: Sedimentology, Mineralogy and integrated micro- and macrofossil biostratigraphies. Cretaceous Research, 22, 795-827. PDF

2001. U. Kramar, D. Stüben, Z. Berner, W. Stinnesbeck, H. Philipp, G. Keller, 2002. Are Ir anomalies sufficient and unique indicators for cosmic events? Planetary and Space Science 49, 831-837. 2002. Keller, G., Adatte, T., Stinnesbeck, W., Affolter, M. Schilli, L. and Lopez-Oliva, J.G., 2002. Multiple Spherule Layers in the late Maastrichtian of northeastern Mexico. GSA Special Vol. 356, 145-162

2002. Keller, G., Adatte, T., Stinnesbeck, W., Affolter, M. Schilli, L. and Lopez-Oliva, J.G., 2002. Multiple Spherule Layers in the late Maastrichtian of northeastern Mexico. GSA Special Vol. 356, 145-162 PDF

2002. Stüben, D., Kramer, U., Berner, Z., Eckhardt, J.D., Stinnesbeck, W., Keller, G., Adatte, T. and Heide, K. 2002. Two anomalies of platinum group elements above the Cretaceous-Tertiary boundary at Beloc, Haiti: Geochemical context and consequences for the impact scenario: Geological Society of America, Special Volume, 356, 163-188.

2002, Adatte, T. Keller, G., Burns, S., Stoykova, K.H., Ivanov, M.I., Vangelov, D., Kramer, U. and Stueben, D., 2002. Paleoenvironment across the Cretaceous-Tertiary (K-T) transition at Bjala, eastern Bulgaria. GSA Special Paper 356, 231-252.

2002. Keller, G., Adatte, T., Stinnesbeck, W., Luciani, V., Karoui, N., Zaghbib- Turki, D., 2002. Paleoecology of the Cretaceous-Tertiary mass extinction in planktic foraminifera. Paleogeogr., Paleoclimatol., Paleoecol., 178, 257-298. PDF (5867 K)

2002, Karoui-Yaakoub, N., Zaghbib-Turki, D. and Keller, G., 2002. The Cretaceous-Tertiary (K-T) mass extinction in planktic foraminifera at Elles I and El Melah, Tunisia. Paleogeogr., Paleoclimatol., Paleoecol., 178, 233-256. PDF (1434 K)

2002, Abramovich, S. and Keller, G., 2002. High stress late Maastrichtian Paleoenvironment in Tunisia: Inference from planktic foraminifera. Paleogeogr., Paleoclimatol., Paleoecol., 178, 145-164. PDF (1678 K)

2002, Stueben, D., Kramar, U., Berner, Z., Leosson, M., Keller, G., Adatte, T., and W. Stinnesbeck, 2002. High resolution carbon and oxygen isotope profiles of foraminifera and the Ca-normaized Sr curve of the late Maastrichtian at Elles, Tunisia. Paleogeogr., Paleoclimatol., Paleoecol., 178, 321-345. PDF (1314 K)

2002, Adatte, T., Keller, G., Stinnesbeck, W., 2002. Late Cretaceous to early Paleocene climate and sea-level fluctuations. Paleogeogr., Paleoclimatol., Paleoecol., 178, 165-198. PDF (2868 K)

2002 Keller, G. and Stinnesbeck, W., 2002. Slumping and a sandbar deposit at the Cretaceous-Tertiary boundary in the El Tecolote section (northeastern Mexico): An impact-induced sediment gravity flow – Comment. Geology, 30, 382-383.

2002. Wolfgang Stinnesbeck, Gerta Keller, Peter Schulte, Doris Stüben, Zsolt Berner, Utz Kramar, José Guadalupe Lopez-Oliva, 2002. The Cretaceous-Tertiary (K/T) Boundary transition at Coxquihui, state of Veracruz, Mexico: evidence for an early Danian impact event? Am. J. S. Amer. Res. 15, 497-509. PDF

2002. Keller, G., Guembelitria dominated late Maastrichtian planktic foraminiferal assemblages mimic early Danian in the Eastern Desert of Egypt. Marine Micropaleontology, 47(l-2), 71-99. PDF

2002. Keller, G., Adatte, T., Burns, S.J., and A. Tantawy, High stress paleoenvironment during the late Maastrichtian to early Paleocene in Central Egypt. Paleogeogr., Paleoclimato., Paleoecol., v. 187, 35-60. PDF (2334 K)

2003. Abramovich, S., Keller, G., Adatte, T., Stinnesbeck, W., Hottinger, L., Stueben, D., Berner, Z., Ramanivosoa, B. and A. Randriamanantenasoa,2002. Age and Paleoenvironment of the Maastrichtian-Paleocene of the Mahajanga Basin, Madagascar: a multidisciplinary approach. Marine Micropaleontology, 47, 17-70. PDF

In press Schulte, P., Stinnesbeck, W., Stueben, D., Kramar, U., Berner, Z., Keller, G., and Adatte, T., in press. Multiple suevite-like deposits with iron-rich spherules and quenched carbonates from the K/T transition in the La Sierrita area, NE Mexico.

In press. Keller, G., Multiple Impacts across the Cretaceous-Tertiary boundary. Earth Science Reviews PDF (3.2 M)

In press. Keller, G., in press. Paleoecology of Late Maastrichtian-early Danian planktic foraminifera in the eastern Tethys (Israel and Egypt).J. Foram. Res.

In press. Keller, G., Stinnesbeck, W., Adatte, T., Holland, B., Stueben, D., Harting, M., C. de Leon and J. de la Cruz, in prep. Spherule deposits in Cretaceous-Tertiary boundary sediments in Belize and Guatemala. J. Geol. London,

In prep. Adatte, T. Keller, G., Stueben, D., Harting, M., Kramar, U., Stinnesbeck, W., Abramovich, S. and Benjamini, C., in prep. Late Maastrichtian and K/T paleoenvironment of the eastern Tethys (Israel): mineralogy, trace element and platinum group elements, biostratigraphy and faunal turnovers.

In prep. Stueben, D., Harting, M., Kramar, U., Stinnesbeck, W., Keller, G., and Adatte, T., in prep. High resolution geochemical record in Mexico during the Cretaceous- Tertiary transition. Geochmica et Cosmochimica Acta,

In press Abramovich, S., Keller, G., Stueben, D. and Berner, Z., in press Characterization of late Campanian and Maastrichtian planktic foraminiferal depth habitats and vital activities based on stable isotopes. Paleoclimatol. Paleoecol. Paleogeogr. In press Abramovich S., and Keller, G., in press. Planktic foraminiferal response to latest Maastrichtian abrupt warm event a case study from midlatitude DSDP Site 525. Marine Micropaleontology

In press, Keller, G. & Pardo, A., in prep. Age and Paleoenvironment of the Cenomanian- Turonian global stratotype section and point at Pueblo, Colorado. Marine Micropaleontology,

In prep. Keller, G., Stueben, D. Berner, Z., and Adatte, T., in prep. Cenomanian- Turonian d13C, d18O, sea level and salinity variations at Pueblo, Colorado, Paleoclimatol. Paleoecol. Paleogeogr.

In prep. Keller, G., Biotic effects of Impacts and Volcanism. EPSL

Books
Keller, G., Stinnesbeck, W., Adatte, T., MacLeod, N., and Lowe, D. R., 1994. Field Guide to Cretaceous-Tertiary boundary sections in Northeastern Mexico, Lunar and Planetary Institute, LPI Contribution No. 827, 110 p.

MacLeod, N., and Keller, G., 1996. Cretaceous-Tertiary Mass Extinctions,  (MacLeod, N., and Keller, G., eds.), W. W. Norton & Company, Inc., New York, 575 p.

Updated 10/18/06