Category Archives: tectonics

Getting a nose for folds

Folds are found everywhere layers are. Folds are the natural consequence of pushing a rug, cooking lasagna or deforming sedimentary or metamorphic rocks. Sniffing out folds, ‘getting a nose for them’, is part of any geologist’s training. Here’s a Google … Continue reading

Categories: England, tectonics

Granites and their space problem

Look at a large-scale geological map and, provided the area is not covered in recent sediments, there will be large areas of red showing outcrops of granite.¬†There are many ways in which rocks can be melted to produce granitic magma. … Continue reading

Categories: Ireland, tectonics

Ireland: good terrain for terrane training

The word terrane has a very specific geological meaning. Usually short for tectonostratigraphic terrane, they’ve been defined as “fault-bounded crustal blocks that preserved a¬†geological record distinct from that of adjacent terranes” (Jones et al., 1983). The concept was first coined … Continue reading

Categories: Ireland, tectonics

The South Mayo Trough: tiny grains record huge events

Sedimentary basins have been described as ‘tape recorders’ that preserve evidence of past events. Some sedimentary basins contain ‘recordings’ of grand tectonic events – plate collisions and mountain building. The information is stored as subtle but compelling patterns in the … Continue reading

Categories: Ireland, metamorphism, sediments, tectonics