Category Archives: Uncategorized

The Borborema Province and its gigant shear zone networks

The NE “corner” of South America, known among geologists as the Borborema province, is penetrated by beautiful transcurrent shear zone networks, with the largest ones being several tens of kilometers wide and extending for hundreds of kilometers, now limited by … Continue reading

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Geologia Estrutural: New edition

The second edition of the Portuguese version of my book was printed a few months ago. Not only does it contain the additions and improvements of the 2nd edition of the English version (see earlier post on this blog), but … Continue reading

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Animations for PowerPoint

A large number of flash animations occur in my e-modules, but they are tricky to get into PowerPoint presentations, which most of us use for presentation and teaching purposes. I ended up making gif-animations of most of them. There is … Continue reading

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Stereonet Mobile: New Stereonet app for the iOS

Stereonet Mobile for the iOS (iPhone, iPad) (available from the iOS AppStore) was made by Rick Allmendinger for both collecting data in the field and analyzing data anywhere. Like Rick’s other software, it is a completely free app that is … Continue reading

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Shear zone initiation and fractures

Ductile shear zones are the results of strain localization in the crust, mostly the middle and lower crust where plastic deformation mechanisms govern. They typically nucleate on preexisting structures such as foliations, veins and fractures, or they can initiate on a … Continue reading

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Geology photos

In connection with the release of the 2nd edition of Structural Geology, I am posting a series of geology pictures on the facebook page of the book. Here is one of the pictures:

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Structural geology, 2nd edition

The second edition of my book is printed and will be shipped out as I write. We wanted to update and add a variety of things; boxes, replacing photos, adding a few illustrations, explaining some things better, etc. The largest single … Continue reading

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