Interactions between organic and inorganic processes are fundamental to development and growth. The initiation of shell formation in extant shelled molluscs appears to be an evolutionarily conserved process. Nevertheless, the physiology that coordinates biomineralization can be hindered by adverse environmental conditions, during which shells also retain environmental information that can...
Date calibrations for applying molecular clocks to phylogeny are typically provided by fossil or other geologically preserved evidence. However, for the vast majority of the Tree of Life, no fossil record exists. While the paleontological record of lipid biomarkers and microbial microfossils provides some information, these records are extremely sparse, and often ambiguous. ...
The study of triple oxygen isotope variations (D17O) in the hydrological cycle and atmosphere has progressed significantly in the last ten years, and new...
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 missing time than rock representing recorded time....
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 environmental...
Abstract: The abundance of multiply substituted (‘clumped’) isotopologues (e.g., 13C16O218O2-) in carbonates is a thermodynamically controlled function of temperature for equilibrated systems. Measurement of...
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...
