geothermal anomaly . An abnormal temperature condition in relation to the overall temperature field.
GeoWord of the Day
The GeoWord of the Day is a free service of the American Geosciences Institute. All of the terms and definitions are from the Glossary of Geology, 5th Edition Revised.
spectrography (spec-trog'-ra-phy). The art or process of using a spectrograph to photograph or map a spectrum.
thermal structure . (a) Indicates the pattern of change of temperature conditions in the subsurface, e.g. by the arrangement of isotherms. (b) An arrangement of zones of increasing metamorphic grade in some distinct structural pattern, for example, a thermal anticline or a thermal dome. Such features are associated with and are produced by a localized heat source, possibly accompanied by anatexis or orogenesis (Winkler, 1967).
auriform (au'-ri-form). Said of a mollusk shell (such as that of a gastropod) shaped like the human ear.
arsenopalladinite (ar-se''-no-pal-la'-di-nite). A metallic white triclinic mineral: Pd8(As,Sb)3 .
pore ice . Ground ice that fills or partially fills pore spaces in the ground; it is formed by freezing of pore water in situ with no addition of water.
chloraluminite (chlor-a-lu'-mi-nite). A white to yellow rhombohedral mineral: AlCl3•6H2O .
tinajita (ti-na-ji'-ta [te-na-he'-ta]). solution pan. Etymol: Spanish, "little water jar".
orientation [photo] . The direction in which an aerial photograph is turned with respect to observer or map. A single photo is best oriented for study when turned so that the shadows are cast toward the observer.
postadaptation (post''-ad-ap-ta'-tion). More perfect adjustment to an adaptive zone after an organism has entered it.
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