2014

Content tagged with 2014

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Paleobiology Seminar: "Diastem Didactic: Some Recent Advances in Late Cretaceous Geochronology, Chronostratigraphy, and OAE Studies"

Events

Speaker: Dr. Brad Sageman (Northwestern University) Abstract: In 1917, Joseph Barrell published a paper titled "Rhythms and the Measurements of Geologic Time" in which he proposed that the sedimentary record was made up of more surfaces representing...

Paleobiology Seminar: "Dynamics of faunal change in relation to tectonic and climatic history”

Events

Speaker: Dr. Catherine Badgley (University of Michigan)

Geobiology Seminar: "How salty was the sea? New constraints on seawater chemistry from ancient evaporites"

Events

Speaker: Dr. Clara Blattler (Princeton University) Abstract: It is surprising that we cannot robustly answer the question: “Why is the sea salty?” The major-element composition of seawater acts as an important boundary condition that shapes how we...

Paleobiology Seminar: "Insights into local and global signals of Cenozoic climate variability from hydrogen isotopes of lipids"

Events

Speaker: Mark Pagani (Yale University)

Geobiology Seminar: "Illuminating sulfur isotope mass-independent fractionation (S-MIF)"

Events

Speaker: Andrew Whitehill (MIT) Abstract: Sulfur isotope mass-independent fractionation (S-MIF) is ubiquitous in Archean and Paleoproterozoic sedimentary rocks and provides the most convincing evidence for a low-oxygen early (pre-2.4 Ga) atmosphere. The...

Paleobiology Seminar: "Mesozoic Tectonics, Oceanic Anoxic Events, and the Evolution of Planktic Foraminifera"

Events

Speaker: Dr. Mark Leckie (UMass-Amherst) Abstract: Global tectonics had a profound influence on climate, weathering, sea level, and seawater chemistry during Mesozoic time. The linkages between tectonic activity, planktic foraminiferal evolution and...

Geobiology Seminar: "Costs, benefits and biogeography of nitrogen fixation in the ocean"

Events

Speaker: Dr. Mick Follows (MIT)

Geobiology Seminar: "High-temperature kinetics of clumped isotopes in calcite and apatite"

Events

Speaker: Daniel Stolper (Caltech) Abstract: The abundance of multiply substituted (‘clumped’) isotopologues (e.g., 13C 16O 2 18O 2-) in carbonates is a thermodynamically controlled function of temperature for equilibrated systems. Measurement of clumped...

Geobiology Seminar: "New insights into the formation of methane at both low and high temperatures using stable isotopes"

Events

Speaker: Daniel Stolper (Caltech) Abstract: Methane is a critical greenhouse gas, energy resource, and product of microbial metabolisms. Despite its importance in the carbon cycle, distinguishing the sources of methane in natural systems is challenging...

Paleobiolory Seminar: "Sources and Sinks of Marine Biodiversity in Deep and Shallow Time"

Events

Speaker: Dr. Wolfgang Kiessling (Erlangen, Germany) Abstract: Identifying regions and environmental settings in which the rates of evolution are greater or lower than average is a major quest in macroevolution. Most commonly, areas with high biodiversity...