Anticosti Island

The well-studied and relatively unaltered Paleozoic strata of Anticosti Island record the Late Ordovician-Early Silurian glaciation and coeval mass extinction event. Work in the Bergmann Lab has focused on constraining the magnitude and duration of this glacial episode through the use of clumped-isotope thermometry, which has provided robust estimates of seawater temperature independentof δ¹⁸O_water and has allowed for estimation of the extent of ice sheets during this interval.

Bergmann, K.D., Finnegan, S., Creel, R., Eiler, John M., Hughes, N.C., Popov, L.E., Fischer, W.W.; A paired apatite and calcite clumped isotope thermometry approach to estimating Cambro-Ordovician seawater temperatures and isotopic composition: Geochimica et Cosmochimica Acta, v. 224, 18-41.

Finnegan, S., Bergmann, K., Eiler, J.M., Jones, D.S., Fike, D.A., Eisenman, I., Hughes, N.C., Tripati, A.K., Fischer, W.W., 2011, The magnitude and duration of Late Ordovician–Early Silurian glaciation, Science, v. 331, p. 903-906.