Previous inversions for slip rate along the San Andreas Fault System (SAFS), based on elastic half-space models, show a discrepancy between the geologic and geodetic slip rates along a few major fault segments. In this study, we use an earthquake cycle model representing an elastic plate over a viscoelastic half-space to demonstrate that there is no significant discrepancy between long-term geo...

For database limitations, see following page ii DATABASE LIMITATIONS Content This database is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. This database, identified ...

Abstract Determining pressure and temperature variations between high-pressure/low-temperature (HP–LT) eclogite blocks is crucial for constraining end-member exhumation models; however, it has historically been challenging to constrain pressures due the high variance associated with this bulk-rock composition. In work, we utilize quartz-in-garnet elastic barometry formation of eclogites from no...

Autonomous geologic analysis of natural terrain is an important technique for science rovers exploring remote environments such as Mars. By automatically detecting and classifying rocks, rovers can efficiently survey an area, summarize results and concentrate on unusual discoveries, thus maximizing the scientific return. Similar techniques can be used in natural settings on land and under water...

Radioactive decay of naturally occurring nuclides provides the basis for the nearly all quantitative temporal constraints on geophysical phenomena, from climate dynamics on scales of 10-10 yr, to planetary differentiation over 10-10 yr. In general there are few geologic problems that are not accessible by radioisotopic chronometers, partly because of the wide range of radioactive parent nuclide...

In Korea, national digital geologic mapping has been carried out since the late 1990s. This approach is a part of so-called NGIS (National GIS) of Korea, and geologically mappable database information is one of nation-covering thematic mapping. Several further researches after the first year project for Korean digital geologic mapping will be followed. Especially, to provide basic information f...

The sulfur isotopic composition of dissolved sulfate in seawater has varied through time. Distinct variations and relatively high rates of change characterize certain time intervals. This allows for dating and correlation of sediments using sulfur isotopes. The variation in sulfur isotopes and the potential stratigraphic resolution of this isotope system is discussed and graphically displayed.

This report summarizes the international divisions and ages in the Geologic Time Scale, published in 2012 (GTS2012). Since 2004, when GTS2004 was detailed, major developments have taken place that directly bear and have considerable impact on the intricate science of geologic time scaling. Precam brian now has a detailed proposal for chronostratigraphic subdivision instead of an outdated and ab...