geo-, ge- +
(Greek: earth, land, soil; world; Gaia (Greek), Gaea (Latin), "earth goddess")
2. A line connecting points of equal or constant temperatures on the surface of the earth.
Where and when a force exceeds the strength of the earth's material, that material is changed by deformations, translocations, or chemical reactions.
The deep geological repository idea involves the encapsulation of used nuclear fuel in long-term engineered casks which are placed and sealed within excavated rooms in a geological formation at a determined depth of 500 to 1000 meters below the earth's surface.
It involves the construction of a vault within a stable, low permeability bedrock, using conventional mining techniques. The bedrock and other engineered barriers are supposed to provide ecological safety over an extended time.
A major demonstration of carbon dioxide injection into a saline formation for sequestration is under way at an offshore gas platform in the North Sea near Norway. Results from this project (and others) suggest that such formations will be reliable, long-term geologic sequestration (storage) sites or carbon dioxide reservoirs.
There are numerous natural carbon dioxide reservoirs throughout the Rocky Mountain states of the United States in geologic "domes" and "traps", suggesting these geological storage formations will be excellent for keeping carbon dioxide captured from industrial facilities.
2. A thermometer constructed to measure temperatures in boreholes to provide information about the temperature range within which minerals were developed.
Since new rocks are generally deposited on top of existing material, those lower down are oldest.
The strata of rock are classified according to their age, and a time scale corresponding to this can be constructed.
The main divisions (eras) are the Paleozoid, Mesozoic, and Cenozoic. These are further subdivided into periods and epochs.
2. The period of time that extends from the beginning of the world to the present day.
3. An interval of time occupied by the earth's geologic history, extending from about 3.9 billion years ago (corresponding to the age of the oldest known rocks) to the present day.
In other words, the part of the earth's history that is recorded in rock strata.
The geological time scale is classified in intervals distinguished by characteristic geological and biological features; as indicated by the following longest to the shortest durations: eon (one thousand million years), era (divided into several periods), period (unit of geological time during which a system of rocks is formed), and epoch (geologic time that is a subdivision of a period).
2. Descriptive of, or pertaining to, geology or the science of the earth.
A science which deals with the history of the earth and its life; especially, as recorded in rocks.
Available for further enlightenment: the Earth, Words from the Myths.
Cross references of word families related directly, or indirectly, to: "land, ground, fields, soil, dirt, mud, clay, earth (world)": agra-; agrest-; agri-; agro-; argill-; choro-; chthon-; epeiro-; glob-; lut-; myso-; pedo-; pel-; rhyp-; soil-; sord-; terr-.