Title: The exhumation of ultrahigh-pressure rocks: a Norwegian perspective.

Ultrahigh-pressure rocks are rocks that have been buried > ~90–100 km beneath the Earth's surface and have subsequently been exhumed back to the surface. These rocks contain indicator minerals such as coesite (the ultrahigh-pressure polymorph of quartz) and metamorphic microdiamond, often as inclusions in garnet grains

Title: A Prototype Remote Sensing Validation Site: Towards a Multi-Variable Approach to Validating and Scaling Remotely-Sensed Observations of the Water Cycle.

There is little doubt that active and passive remote sensing technologies can be used to observe many components of the water cycle. Despite their apparent usefulness, the quantitative aspects of these observations are not well known.

Title: The Midcontinent Rift System in Iowa.

The Midcontinent Rift System (MRS) is a failed rift extending from eastern Lake Superior to east-central Kansas.  One of the most pronounced crustal features on earth, it developed about 1.1 billion years ago, probably in response to tectonic activity associated with the late stage of the Grenville Orogeny.  Rocks of the MRS are well exposed in the

Title: Timing and Nature of Late Quaternary Climate Change from Cave Deposits.

Abstract: I will discuss the status of uranium-series techniques for dating carbonates: the history, current status, and new developments.   I will make the case that well-chosen cave calcite is ideal material for precise and accurate dating using this technique.   I will also show data that indicate that some cave stalagmites record the history of the oxygen isotopic composition of meteoric precipitation at the cave site.  

Title: Multivariate Visualization and Applications to Uncertainty.

Visualization of scientific data and models is a well-established and very active research area. Many models of physical systems are driven by multiple independent variables, and we oftentimes want to understand not only the final model results, but also the primary factors which influenced those results. Moreover, the data and

Title: Tomographic characterization of porous and fractured geologic media through well and tracer tests.

The subsurface is heterogeneous at multiple scales and this is the rule rather than the exception. The knowledge of detailed three-dimensional distributions of hydraulic parameters (hydraulic conductivity and specific storage) is critical in the prediction of contaminant transport,

Title: Foraminifers and the end-Permian mass extinction.

Ninety-one percent of calcareous foraminiferal genera became extinct during the end-Permian mass extinction. The Early Triassic Epoch was a survival phase characterized by a short-lived proliferation of opportunistic forms and then a prolonged interval of low diversity. The foraminiferal extinction and pursuant survival/recovery has been

Title: The Crack at the Edge of the World: America and the Great California Earthquake of 1906.

Winchester is the author of The Crack at the Edge of the World. In 1906, there were powerful, destructive earthquakes from Taiwan to South America. In San Francisco, a quake occurred just after five in the morning on April 18, causing fires that raged for three days, destroying much of the city. This

Title: Faults and fault-rocks in the desert & the ocean: granular controls on Earth's fundamental plate boundaries.

Faults catalyze interactions between nearly all of the Earth’s systems, yet relatively little is known about the geological material within faults, or fault rocks. Fault rocks have granular microstructures making understanding their mechanics an interesting problem. Granular

Title: Geoelectrical Investigations of Karst and Incised Streams.

Time-domain electromagnetic (TEM) soundings that I did when working for USGS showed that the St Joseph River, Michigan, once incised a deep canyon into the Paleozoic bedrock there.  That probably happened about 11,000 B.P. when base level of southern Lake Michigan was much lower.  After retiring, I did similar TEM work to trace

Title: A comparison of gradients in reef coral community composition between Late Pleistocene and modern coral reefs of Western Australia.

In coastal Western Australia, Late Pleistocene reef coral assemblages are exposed landward of the  modern reef system over a latitudinal gradient of approximately 11 degrees. Hence the modern and  Pleistocene reef systems in the region provide a natural