Now showing items 61-70 of 317
The relationship between the petrology and the thorium and uranium contents of some granitic rocks
The object of this investigation is to find large scale variations in thorium and uranium contents of granitic rocks and to link these variations to petrographic types and to geological characteristics of the plutons in ...
Resolving the nanoscale mechanisms of calcite growth and dissolution from nonstoichiometric and microbial solutions
The relative rates of calcite (CaCO3) precipitation and dissolution largely determine the preservation and subsequent accumulation of carbonate in the geologic record and are fundamental parameters for predicting the fate ...
Time-lapse imaging of fault properties at seismogenic depth using repeating earthquakes, active sources and seismic ambient noise
The time-varying stress field of fault systems at seismogenic depths plays the mort important role in controlling the sequencing and nucleation of seismic events. Using seismic observations from repeating earthquakes, ...
Evidence for methanogenesis on slope sites during the late Paleocene and early Eocene: Carbonate concretions from the Dukla Nappe, outer Carpathians, Poland
The late Paleocene to early Eocene was a prolonged period of global warming punctuated by abrupt intervals of rapid temperature rise. These hyperthermal events, especially including the Paleocene-Eocene thermal maximum, ...
The impact of long-term and short-term sea level changes on the evolution of the Wisconsinan-Holocene Trinity/Sabine incised valley system, Texas continental shelf
Over 1,000 km of high resolution seismic profiles and nearly 200 piston cores, vibracores, and geotechnical boring descriptions were interpreted to document the evolution of the Trinity/Sabine incised valley system. Long-term ...
The Texas mud blanket: Understanding fine-grained sediment flux in the NW Gulf of Mexico during the previous transgression
The evolution and source of the Texas Mud Blanket (300 km3) was determined from 26 new radiocarbon dates and from ∼3000 km of 2D seismic data. Sediment flux (km3/ka) was calculated from this combined dataset. XRD reveals ...