GeoLog

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Imaggeo on Mondays: A fold belt within a grain

Laura Roberts-Artal May 25, 2015

A fold belt within a grain. Credit: Sina Marti (distributed via imaggeo.egu.eu)

Tiny crinkly folds form the main basis of today’s Imaggeo on Mondays. Folding can occur on a number of scales; studying folds at all scales can reveal critical information about how rocks behave when they are squeeze and pinched, as described by Sina Marti, from the University of Basel. Although many geoscientists have seen such fold structures many times before, if you noticed the scale bar in th ...[Read More]

For the love of rocks

Sara Mynott February 14, 2014

We often have a way of seeing patterns in otherwise random features, and rock outcrops are no exception. Do you see the heart on its side? To the untrained eye an outcrop like this is simply a heart-shaped feature in an otherwise grey rock. But to the geologist, the layers, swirls, shapes and colours tell a story. The ribbons in the granite show that the rock has been subjected to sheer forces and ...[Read More]