Geohistory 1: Accounting for basin subsidence
Decompacting a stratigraphic column to determine basin subsidence The analysis of a sedimentary basin begins at the hand-sample and outcrop […]
In the field
Geofluids: The permeability of faults
The changing fortunes of fault permeability and fluid flow Faults can act as conduits or barriers to fluid flow. As
Source to sink: Sediment routing systems
Sediment routing systems – or how sediment is dispersed between source and sink Earth scientists routinely talk about the rock
Allochthonous terranes – suspect and exotic
Allochthonous terranes, suspect terranes, exotic terranes. In 1972 James Helwig introduced the concept of orogenic collage, wherein orogenic belts were
Basins formed by strike-slip tectonics
By the early 1970s, the new tectonics (the plate kind) had established a firm grip on the geological consciousness. Even
Strike-slip faults – some terminology
In 1940 Harold Wellman and Dick Willett proposed that two groups of rocks at either end of the South
Glossary: Sedimentary basins and tectonics
Companion glossaries Abyssal plain: The deepest parts of the oceans at 4000-8000 m, covering 83% of Earth’s total ocean area.
Accretionary prisms and forearc basins
Forearc basins are kinematically linked to accretionary prisms. Forearc basins and accretionary prisms are located in the arc-trench gap
Thrust faults: Some common terminology
Some terminology for Thrust faults, duplexes, imbricate fans, and fold-thrust belts. Thrusts are reverse faults having fault plane dips <45o,
Basins formed by lithospheric flexure
Basins formed by flexure of oceanic and continental lithosphere; foreland basin exemplars. What is flexure? The way we define the