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Professor Darren Grocke's Outputs (9)

Advances in mollusc sclerochronology and sclerochemistry: tools for understanding climate and environment (2008)
Journal Article
Gröcke, D., & Gillikin, D. (2008). Advances in mollusc sclerochronology and sclerochemistry: tools for understanding climate and environment. Geo-Marine Letters, 28(5-6), 265-268. https://doi.org/10.1007/s00367-008-0108-4

This Special Issue of Geo-Marine Letters compiles papers on marine, estuarine and freshwater mollusc shells as recorders of environmental and climatic conditions. Considering that many past studies have differentiated geochemical investigations from... Read More about Advances in mollusc sclerochronology and sclerochemistry: tools for understanding climate and environment.

Out of America: Ancient DNA evidence for a New World origin of Late Quaternary Woolly Mammoths (2008)
Journal Article
Debruyne, R., Chu, G., King, C., Bos, K., Kuch, M., Schwarz, C., …Poinar, H. (2008). Out of America: Ancient DNA evidence for a New World origin of Late Quaternary Woolly Mammoths. Current Biology, 18(17), 1320-1326. https://doi.org/10.1016/j.cub.2008.07.061

Although the iconic mammoth of the Late Pleistocene, the woolly mammoth (Mammuthus primigenius), has traditionally been regarded as the end point of a single anagenetically evolving lineage, recent paleontological and molecular studies have shown tha... Read More about Out of America: Ancient DNA evidence for a New World origin of Late Quaternary Woolly Mammoths.

Assessing pedogenic calcite stable-isotope values: Can positive linear covariant trends be used to quantify palaeo-evaporation rates? (2008)
Journal Article
Ufnar, D., Gröcke, D., & Beddows, P. (2008). Assessing pedogenic calcite stable-isotope values: Can positive linear covariant trends be used to quantify palaeo-evaporation rates?. Chemical Geology, 256(1-2), 46-51. https://doi.org/10.1016/j.chemgeo.2008.07.022

Palaeoclimate models suggest enhanced evaporation rates in subtropical regions (15–30° latitude) during greenhouse-world conditions, however, there are no empirical data to support these estimates. Laboratory evaporation experiments have shown that c... Read More about Assessing pedogenic calcite stable-isotope values: Can positive linear covariant trends be used to quantify palaeo-evaporation rates?.

Precipitation rates and atmospheric heat transport during the Cenomanian greenhouse warming in North America: Estimates from a stable isotope mass-balance model (2008)
Journal Article
Ufnar, D., Ludvigson, G., González, L., & Gröcke, D. (2008). Precipitation rates and atmospheric heat transport during the Cenomanian greenhouse warming in North America: Estimates from a stable isotope mass-balance model. Palaeogeography, Palaeoclimatology, Palaeoecology, 266(1-2), 28-38. https://doi.org/10.1016/j.palaeo.2008.03.033

Stable isotope mass-balance modeling results of meteoric δ18O values from the Cenomanian Stage of the Cretaceous Western Interior Basin (KWIB) suggest that precipitation and evaporation fluxes were greater than that of the present and significantly d... Read More about Precipitation rates and atmospheric heat transport during the Cenomanian greenhouse warming in North America: Estimates from a stable isotope mass-balance model.

Tracing the ecophysiology of ungulates and predator–prey relationships in an early Pleistocene large mammal community (2008)
Journal Article
Palmqvist, P., Pérez-Claros, J., Janis, C., & Gröcke, D. (2008). Tracing the ecophysiology of ungulates and predator–prey relationships in an early Pleistocene large mammal community. Palaeogeography, Palaeoclimatology, Palaeoecology, 266(1-2), 95-111. https://doi.org/10.1016/j.palaeo.2008.03.015

Research into the reconstruction of ancient communities in terms of dietary regimes, habitat preferences and ecological interactions of species has focused predominantly on biogeochemistry or ecomorphology alone and not in combination. The Venta Mice... Read More about Tracing the ecophysiology of ungulates and predator–prey relationships in an early Pleistocene large mammal community.

A stratigraphic test of the terrestrial carbon-isotope record of the latest Albian OAE from the Dakota Formation, Nebraska (2008)
Journal Article
Gröcke, D., & Joeckel, R. (2008). A stratigraphic test of the terrestrial carbon-isotope record of the latest Albian OAE from the Dakota Formation, Nebraska

Recently, the Albian–Cenomanian boundary was identifi ed in a terrestrial sequence at Rose Creek Pit (Gröcke et al. 2006) using carbon-isotope stratigraphy of bulk sedimentary organic matter and charcoal. However, within terrestrial sequences there a... Read More about A stratigraphic test of the terrestrial carbon-isotope record of the latest Albian OAE from the Dakota Formation, Nebraska.

Stable-isotope record of the Eifelian–Givetian boundary Kačák–otomari Event (Middle Devonian) from Hungry Hollow, Ontario, Canada (2008)
Journal Article
van Hengstum, P., & Gröcke, D. (2008). Stable-isotope record of the Eifelian–Givetian boundary Kačák–otomari Event (Middle Devonian) from Hungry Hollow, Ontario, Canada. Canadian Journal of Earth Sciences, 45(3), 353-366. https://doi.org/10.1139/e08-005

The Kačák Event in the Middle Devonian (Eifelian–Givetian (E–G) boundary) is a period of apparent global anoxia coincident with widespread deposition of black shale in hemipelagic, pelagic, and some neritic facies. Conodont biostratigraphy in the Nor... Read More about Stable-isotope record of the Eifelian–Givetian boundary Kačák–otomari Event (Middle Devonian) from Hungry Hollow, Ontario, Canada.

A multiaxial growth analysis of stable isotopes in the modern shell of Saxidomus gigantea: Implications for sclerochronology studies (2008)
Journal Article
Kingston, A., Gröcke, D., & Burchell, M. (2008). A multiaxial growth analysis of stable isotopes in the modern shell of Saxidomus gigantea: Implications for sclerochronology studies. Geochemistry, Geophysics, Geosystems, 9(1), Article Q01007. https://doi.org/10.1029/2007gc001807

Stable-isotope ratios of two modern Saxidomus gigantea specimens from Namu, British Columbia, are presented to show intraspecimen and interspecimen isotopic variation. Isotopic profiles (δ 13Cshell, δ 18Oshell) were generated along the axis of maximu... Read More about A multiaxial growth analysis of stable isotopes in the modern shell of Saxidomus gigantea: Implications for sclerochronology studies.