Category Archives: Uncategorized

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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What thrusting does to porous sandstones (surprisingly little)

To many of us, thrust nappes and thrusting are things related to metamorphic rocks or shale-limestone sequences in places such as the Alps, the Caledonides or the Canadian Rockies, while rifts are more commonly associated with porous sandstones and shales. When shale-limestone … Continue reading

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The Caledonian bedrock layer cake in S Norway

In the South Norway Caledonides – the Himalaya-style mountain chain that formed ca. 420 million years ago when Greenland and Scandinavia smashed into each other – there are three principally different rock units that are stacked on top of each other … Continue reading

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