Microscopic tunnels made in crystals by escaping nuclear particles emitted by radioactive elements. Most commonly studied are fission tracks in zircon crystals made by the radioactive decay of uranium, present as an impurity. A lake, stream, or other body of water that flows over its natural confining boundaries. During a flood, water flows out over land not normally covered with water. During floods, when the stream overflows its banks, water flows over the flood plain.
Streams construct flood plains that accommodate their maximum flood capacity.
Fluvial deposits are sediments deposited by the flowing water of a stream. Rock ruptures at this spot, then seismic waves radiate outward in all directions. . Foliation forms in metamorphic rocks when pressure squeezes flat or elongates minerals so that they become aligned. These rocks develop a platy or sheet-like structure that reflects the direction that pressure was applied. . A rock formation is a body of rock of considerable extent with distinctive characteristics that allow geologists to map, describe, and name it.