News Fall Geoscience newsletter Ben van der Pluijm and collaborators are continuing their research on orogenic geofluid sources and timing, focusing on the US and Canadian Rockies and the US Appalachians. This summer, Erin Lynch completed her PhD on orogenic fluid fingerprinting and now shares her talents at Shell, following an academia-to-industry path of many of his recent PhD students. As a reward, Ben got the Michigan Stadium to himself to punt some seismometers photo. Samantha Nemkin, in a project with Rob Van der Voo, finalized her research on synfolding remagnetization, showing this is very common in the Rocky Mountains and its equivalent in Mexico. A third paper, on the Monterrey orocline in northern Mexico, was just accepted for publication. Austin Boles completed his studies on clays in a range of deformation settings, and the development of a more advanced X-ray clay characterization method.
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Need a crudely translated version of this page or any other text? Vaya a Babelfish Avere bisogno della versione tradotta di a crudamente di questa pagina o di qualunque altro testo? A program for spherical projection of directional datasets. An alternative program is Wintek , which can be downloaded here.
For a basic unzip routine, download pkunzip. Stereonet for Mac, by Rick Allmendinger. StressMohr for Windows, by Ulrich Kruse.
This program illustrates the use of stress calculations for two-dimensional systems. The program consists of five displays. In each display you can vary the physical situation and immediately see the effects in the graphical displays. The first display illustrates the relation between forces and stresses acting on a rectangular solid.
In the second display, you explore the stress on a plane as you vary the orientation of the plane and the state of stress in the system. We illustrate the calculation of the stress on the plane in terms of a simple matrix multiplication in the third display.
You can also observe the simple geometry of the envelope of the stresses that are produced as the angle of the plane is varied. The fourth display shows the behavior of the normal and shear components of the stress on the plane. When the normal component is plotted along x and the shear component along y, the envelope will be a circle: called a Mohr circle. This beautiful result lets you visualize the range of possible stresses on the plane.
Finally in the last display, you can explore the conditions which lead to the fracture of a sample: you can vary the stresses until the stresses are just strong enough to cause fracture by watching the changes in size and location of the Mohr circle. Click here to download the zipfile that contains the program and a MSWord version of the manual. The manual is also available online by clicking here. Strain Calculator presents strain data and calculations graphically and numerically.
Conversions of strain ratios to stretches at a given volume change can be plotted directly onto a logarithmic strain plot see screen shot. Shear zone parameters ellipticity, deformed and undeformed orientations, etc.
Please note use restrictions. Some files are large and plug-ins may be required.
Earth Structure: An Introduction to Structural Geology and Tectonics
Need a crudely translated version of this page or any other text? Vaya a Babelfish Avere bisogno della versione tradotta di a crudamente di questa pagina o di qualunque altro testo? A program for spherical projection of directional datasets. An alternative program is Wintek , which can be downloaded here. For a basic unzip routine, download pkunzip.
Available Our Retail Price: New and updated art for more informative illustration of concepts. Kundrecensioner Det finns 2 recensioner av Earth Structure. Earth Structure shows how assemblages of structures relate to different geological settings in the context of plate tectonics. The Second Edition also benefits from new artwork that clearly illustrates complex concepts.
Earth Structure: An Introduction to Structural Geology and Tectonics (Second Edition)