TS
Tectonics and Structural Geology

Hannah Davies

Hannah Davies is currently a PhD student in Lisbon University, Portugal. By combining GPlates and numerical modelling she is exploring the link between plate tectonics and tides. As ocean basins change over geological time scales due to continental drift, and the Wilson cycle, the tides in those ocean basins also changes. Hannah's work is currently focused on quantifying this change in the tides over geological time.

Features from the Field: Stretching Lineations

Features from the Field: Stretching Lineations

Deep beneath our feet, deformation of rocks at high temperature produces impressive structures such as shear zones, that localize the movement of two volumes of rock with respect to one another. Shear zones are strongly deformed bands with strongly foliated structures (i.e., with rocks that look like a pile of leaves) and kinematic indicators, such as S-C fabrics, that tell us geologists which way ...[Read More]

Features from the Field: S-C fabrics

Features from the Field: S-C fabrics

As we have seen in previous Features from the field posts, structural fabrics are both informative and spectacular. But many structural geologists will list a shear zone fabric, such as mylonite, as their favourite! As Samuele, Hannah and I wrote in a previous post, shear zones are regions of intense deformation where rocks have accommodated an extremely high amount of strain and that strain has b ...[Read More]

The ECS TS team, or what happens between GAs

The ECS TS team, or what happens between GAs

As the EGU Tectonics and Structural Geology (TS) Early Career Scientist (ECS) Representative, and with the outlook of a second virtual general assembly, I take the opportunity to: (i) provide in two following blogposts, some general guidelines and advice to EGU TS attendees, presenters, and conveners, as recently informed by several blog posts in the EGU-Wide blogs, and (ii) highlight some of the ...[Read More]

Features from the Field: Shear Zones and Mylonites

Features from the Field: Shear Zones and Mylonites

The San Andreas Fault in California, the Alpine Fault in New Zealand, or the Main Frontal Thrust in the Himalayas are some of the most famous and largest fault zones that accommodate the relative displacement between two adjacent crustal blocks. Such faults, however, represent only the shallower expression of something much bigger: a crustal shear zone. In the first 10 kilometers or so of the crus ...[Read More]

Mind your Head: Taking care of yourself during the Corona-virus crisis – Part 2

Mind your Head: Taking care of yourself during the Corona-virus crisis – Part 2

It has been many months since the first lockdown, in some countries about a year, in other countries perhaps eight months. A continuing learning curve, with many ups and downs. Now the end is slowly appearing on the horizon, with promises of vaccines, and several countries making definite plans on when and how to vaccinate. Still – it will take at least 6 months, quite possibly more, until it is o ...[Read More]

#ShareEGU20: An online EGU General assembly?

#ShareEGU20: An online EGU General assembly?

In mid-March it was decided that the EGU conference in Vienna was to be cancelled, with an alternative proposed, the online GA. Being the first EGU general assembly to be held online, many people are doubtful about many aspects, such as how the conference will be organised and conducted. EGU has been providing answers to questions on their page and on Geolog, and we thought we would provide some h ...[Read More]

Beyond Tectonics: Building fictional worlds to better understand our own

Beyond Tectonics: Building fictional worlds to better understand our own

In this edition of “Beyond Tectonics” Ben Blackledge and Hannah Davies talk about worldbuilding and how it can be applied to the discipline of tectonics and tides. Ben Blackledge recently completed his MSc in Bangor and will soon be beginning a PhD in Bristol University.   Let’s begin with a question. Are the tides always the same on every planet? Because of the force of gravity, ...[Read More]

Beyond Tectonics: How mountain building shaped biodiversity

Beyond Tectonics: How mountain building shaped biodiversity

This edition of “Beyond Tectonics” is brought to you by Lydian Boschman. Lydian is a postdoctoral researcher at ETH Zürich. She has a background in geology and plate tectonic reconstructions, but now works with a group of biodiversity modelers of the Landscape Ecology group at ETH, bridging the gap between geology and biology. In her research, she focuses on the uplift history of the Andes, and ho ...[Read More]

Bangor and Snowdonia, a natural laboratory for geologists of the scientific revolution

Bangor and Snowdonia, a natural laboratory for geologists of the scientific revolution

Bangor, once a tropical paradise on the coast of Gondwana, then a volcanic wasteland at the foothills of an immense mountain chain. The region would then be buried under glaciers for thousands of years before finally developing into an unassuming Welsh University town.   Wales’ place in modern geology Perhaps you have looked at the chronostratigraphic chart of Earth history and wondered what ...[Read More]

Beyond Tectonics: Can only tectonically active planets sustain life?

Beyond Tectonics: Can only tectonically active planets sustain life?

This edition of “Beyond Tectonics” is brought to you by David Waltham. David is a professor of Geophysics at Royal Holloway who studies Geology, Astronomy and Astrobiology. His current research focus is on whether the Earth is “special” because it is habitable, or if the Earth is one of a vast amount of life-bearing planets. “Is Earth Special? Do we live on a typical rocky ...[Read More]