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Showing 1 to 9 of 9 for “"Ferrar"”.
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High-precision U/Pb geochronology of large igneous provinces and mass extinctions : testing coincidence and causation
… event in the Phanerozoic, and (2) the Karoo-Ferrar LIP and the early-Jurassic biotic crisis and global ocean anoxia. With these datasets, age-models for both mass extinction and LIP magmatism precise to a maximum of ~0.02% are developed, enabling, for the first time, resolution of the …
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Provenance of the ice-cored moraine at Mt. Achernar, Law Glacier, Antarctica
… are interpreted to be primarily the Beacon and Ferrar Supergroup rocks respectively. The U/Pb data from the till is consistent with a Beacon Supergroup source as samples consistently show significant populations from the Permian ~250-260 Ma, the Proterozoic ~565–600 Ma, ~950–1270 Ma, and …
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Biogeochemical Cycling and Paleoenvironmental Reconstructions of the Toarcian Oceanic Anoxic Event from Western North America
… the Mesozoic when the emplacement of the Karoo-Ferrar Large Igneous Province (LIP) is thought to have resulted in significant environmental change. Associated with this interval was the widespread deposition of organic-rich sediments, carbon cycle and seawater chemistry changes, global warming, …
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Evaluating redox cycling across the Toarcian Oceanic Anoxic Event with implications for paleo-environmental reconstructions and organic matter sulfurization
… phase of volcanism associated with the Karoo-Ferrar Large Igneous Province and an interval of heightened marine invertebrate extinction. Ultimately, our data support a greater temporal extent of anoxic conditions around the T-OAE, which support the greater sensitivity of marine oxygen levels …
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Recalibrating the breakup history of SW Gondwana: the first U-Pb chronostratigraphy for the Uitenhage Group, South Africa
… rapidly during the emplacement of the Karoo and Ferrar Large Igneous Province in the Early Jurassic (Pliensbachian) and likely predates the main phase of rifting in the southern Cape, whereas the Uitenhage Group was deposited over a prolonged (> 40 Ma) period from the Early Jurassic into the …
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Measurements of Flow in Boundary Layer Ingesting Serpentine Inlets
Highly integrated airframe-propulsion systems featuring ingestion of the airframe boundary layer offer reduced noise, emissions, and fuel consumption. Embedded engine systems are envisioned which require boundary layer ingesting (BLI) serpentine inlets to provide the needed air ow to the engine. …
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Measurement and Uncertainty Analysis of Transonic Fan Response to Total Pressure Inlet Distortion
Distortion tolerant fans represent the enabling technology for the successful implementation of highly integrated airframe propulsion system vehicles. This investigation extends the study of fan-distortion interactions to an actual turbofan engine with a total pressure distortion profile …
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Antarctic glacial chronology : new constraints from surface exposure dating
… and determination of initial 3He/4He in Ferrar Dolerite and Beacon Sandstone, substantially reduce uncertainties in Antarctic exposure ages. 3He production rates of 129 ± 4 atoms/g/yr (olivine) and 124 ± 4 atoms/g/yr (clinopyroxene) at sea level, high latitude, are determined from an …
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Transformation formulas associated with integrals involving the Riemann Ξ-function and rank-crank type PDEs in partition theory
… such as Koshliakov's formula, Hardy's formula, Ferrar's formula and, of course, Ramanujan's above transformation formula, in the sense that all of them can be generated in similar ways starting from the general integral involving the Riemann $\Xi$-function. This also leads us to extended …