In compaction high pressures weld the particles together. Argillaceous rocks —those high in clay—are the more easily compacted, while coarser-grained rocks are generally consolidated by cementation. Small particles are more soluble than larger grains; hence solutions may at the same time be undersaturated toward small particles and oversaturated toward the larger grains. The result is that the smallest grains will tend to dissolve, and be redeposited on the larger grains. Thus the larger grains are in time cemented together when the material lying between them is dissolved in water and deposited on them in solid form.
A fast stream has more energy and greater turbulence, and can therefore carry coarser particles and a heavier total load than a slow stream of the same size. Some rivers carry a small load simply because resistant rocks or heavy vegetation inhibit the production of sediment in the basin.
Particles swept along in the turbulent current and not in contact with the bottom constitute the suspended load. Particles too coarse to be suspended may move near the bottom, by jumping rolling, or sliding, and comprise the bed load.
The earth's magnetic field is distorted by electrically charged particles from the sun [5]. These particles flow in the upper atmosphere and create small variations of the magnetic field at ground level. Some variations are regular - such as the diurnal (night and day) variation - and some, such as magnetic storms, are occasional.
In compaction high pressures weld the particles together. Argillaceous rocks —those high in clay—are the more easily compacted, while coarser-grained rocks are generally consolidated by cementation. Small particles are more soluble than larger grains; hence solutions may at the same time be undersaturated toward small particles and oversaturated toward the larger grains. The result is that the smallest grains will tend to dissolve, and be redeposited on the larger grains. Thus the larger grains are in time cemented together when the material lying between them is dissolved in water and deposited on them in solid form.