Volgian . European stage: Uppermost Jurassic, equivalent to Tithonian.
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.
physiotope (phys'-i-o-tope''). A term defined by Moore (1949, p.17) as "designation of all purely physiochemical elements of an environment", but intended by him to represent the sedimentary environment of a physiofacies. Weller (1958, p.616) notes that if the term is to be accepted as having a meaning similar to "biotope" or "lithotope", it should be defined as an "area".
top [stratig] . A term used in petroleum geology for the uppermost surface of a formation where it is encountered during drilling, usually characterized by the first appearance of a distinctive feature (such as a marked change in lithology or the occurrence of a guide fossil). It is often determined by a distinctive configuration on an electric log, and it is widely used in correlation and structure-contour mapping.
remote sensing (re-mote'). The science of collecting, processing, and interpreting images that record the interaction between electro-magnetic energy and matter. Acquiring information about an object or phenomenon by a recording device that is not in physical contact with the subject being studied. Aerial photographs and imagery acquired from a satellite are examples of remotely sensed information.
Willow Lake layering (Wil'-low). A type of rhythmic layering in which the layers are composed of elongate mineral grains oriented with their long axes roughly perpendicular to the layering (Taubeneck and Poldervaart, 1960, p.1295). Syn: comb layering.
flow velocity . A vector point function used to indicate rate and direction of movement of water through soil, per unit of time and perpendicular to the direction of flow.
datum plane [surv] . A permanently established horizontal plane, surface, or level to which soundings, ground elevations, water-surface elevations, and tidal data are referred; e.g. mean sea level is a common datum plane used in topographic mapping. See also: tidal datum; chart datum. Syn: datum level [surv]; reference level; reference plane.
teppe . A Persian term for mound [arch]. Variant form of the word "tepe"; equivalent to Arabic tell.
LS-tectonite . Tectonite whose fabric has both planar and linear fabric elements caused by deformation. Cf: L-tectonite; S-tectonite .
ouenite (ou'-en-ite). A fine-grained diabase resembling eucrite and containing chrome diopside, anorthite, and smaller amounts of orthopyroxene and olivine. The name, given by Lacroix in 1911, is for Ouen, New Caledonia. Obsolete.
Pages
