Laminated sandstone lithofacies
Laminated lower plane bed and upper plane bed sandstone lithofacies Use this link to read the introduction to the lithofacies […]
The (really) Ancient Earth
Ripple lithofacies influenced by tides
Lenticular bedding, flaser bedding, and interference ripples Most crossbeds and their associated bedforms cannot be linked directly to specific environments
Gastropod shell morphology for sedimentologists
Some basic gastropod morphology to assist sedimentological interpretations This is a companion post to bivalve shell morphology. The world of
Lithic grains in thin section – avoiding ambiguity
The utility of lithic grains as provenance indicators The composition of terrigenous sandstone is usually described in terms of the
Fluid flow: Froude and Reynolds numbers
19th century experiments that helped quantify the nature of fluid flow, surface waves, and bedforms. It all depends on inertia,
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
Glossary: Stratigraphy
Companion glossaries Sedimentary facies and processes Sedimentary structures Sedimentary basins and tectonics Glossary of sequence stratigraphy, stratigraphic terminology, stratigraphic concepts
Glossary: Sedimentary facies and processes
Companion glossaries Ablation: The removal of ice and snow by melting, evaporation, wind erosion, sublimation (solid to vapour phase without
Classification of sedimentary basins
The rationale for classification of sedimentary basins The formulation of plate tectonic theory in the late 1960s led to a
The rheology of the lithosphere
The mechanical behaviour, or rheology of the lithosphere. Sedimentary basins are regions of long-term subsidence of, in most cases,