A submarine channel complex
Here is a brief description of a submarine channel complex in the Jurassic Bowser Basin (northern British Columbia), a major […]
Greywackes in thin section
Greywacke petrography On the outside, greywacke is generally presented in varying shades of grey commonly with greenish hues, hammer-ringing hard,
Sandstones in thin section
The selection of sandstones in plain polarized light (left) and crossed nicols (right) shown here illustrate common petrographic attributes. Abbreviations
Geohistory 2: Backstripping tectonic subsidence
Teasing the tectonic subsidence from total basin subsidence Sedimentary basins are defined as regions of long-term subsidence of the crust
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
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
Geofluids: Sedimentary basin-scale fluid flow
Fluid flow, like rocks and sediments, define sedimentary basins There is a complex interweave of fluid, sediment, and rock
Geofluids: Lithosphere-scale fluid flow
Fluid flow at lithospheric scales There’s not much that goes on in sedimentary basins that doesn’t involve fluids, particularly the
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