Category Archives: structures

Friday focal mechanism: mountain building in Argentina

Yesterday a magnitude 6.2 earthquake struck in the Jujuy province of northwestern Argentina, in the western foothills of the Andes. What few news reports there are indicate strong shaking but little damage in what seems to be a remote and … Continue reading

Categories: earthquakes, focal mechanisms, geohazards, structures

New at Erratics – the largest meteorite crater in the world

The clinching evidence for the Vredefort dome being formed by an impact did not come from aerial photos, but from under the microscope. Continue reading

Categories: links, planets, Proterozoic, structures

The baking of an angular unconformity: Hutton’s Unconformicake

One of the most famous sites in the history of geology – in cake form!. Chris’s entry for Accretionary Wedge #30: the bake sale Continue reading

Categories: bloggery, structures

The making of an angular unconformity: Hutton’s unconformity at Siccar Point

Photos and video from a geo-pilgrimage: an in-depth look at Hutton’s Unconformity, and the geological history that it represents. Continue reading

Categories: deep time, geology, outcrops, Palaeozoic, photos, structures

The fault that made a mountain range

How the Teton Range and the Teton Fault are essentially the same thing. Continue reading

Categories: geology, geomorphology, outcrops, photos, structures