The stones were also threatened by weathering and the antireligious orthodoxy of the Soviet state.
His later studies included the origin of stratified rocks, weathering, and marine biology.
It alters rather easily during chemical weathering and thus is rare in sediments and sedimentary rocks.
The slow processes of weathering and erosion eventually release these elements to enter the cycle.
It is highly resistant to weathering and tends to concentrate in sandstones and other detrital rocks.
Older mountain ranges, eroded by weathering and runoff, mark zones of earlier plate-margin activity.
(Denudation is the wearing away of the terrestrial surface by processes including weathering and erosion).
Scientists are interested in life's role in oxygenating the atmosphere and reshaping the surface through weathering and erosion.
The processes of weathering and erosion strip soluble elements such as sodium from their host minerals, and the relatively high concentration of sodium in ocean water is attributed to the weathering and erosion that accompanies continental drainage.
Any organic matter is rapidly oxidized when exposed to weathering, and the soils consequently become even poorer.
As the Sun ages it will get brighter, astronomers say, increasing the weathering and washing away of carbon dioxide.
