tectonic map . A map that portrays the architecture of the outer part of the Earth. It is similar to a structure-contour map, which primarily shows dipping strata, folds, faults, and the like, but the tectonic map also presents some indication of the ages and kinds of rocks from which the structures were made, as well as their historical development. Cf: paleotectonic map.
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.
shallower-pool test (shal'-low-er-pool''). A well located within the known limits of an oil or gas pool and drilled with the object of searching for new producing zones above the producing zone of the pool (Lahee, 1962, p.134).
inaperturate (in-ap-er'-tur-ate). Said of palynomorphs having no germinal, harmomegathic, or other preformed openings. Cf: acolpate; alete.
beak [bot] . A long, prominent point of a plant part, e.g. of a fruit or pistil.
indicated mineral resource . That part of a mineral resource for which tonnage, densities, shape, physical characteristics, grade, and mineral content can be estimated with a reasonable level of confidence. It is indicated by information that is too widely or inappropriately spaced to confirm geological and/or grade continuity but is spaced closely enough for continuity to be assumed (JORC, 1999). Cf: inferred mineral resource; measured mineral resource.
orbitoid (or'-bi-toid). Any foraminifer belonging to the superfamily Orbitoidacea, characterized by large discoidal saddle-shaped or stellate tests with walls composed of radially arranged calcite crystals and with bilamellid septa. Range, Cretaceous to Holocene.
coparsite . A metallic black orthorhombic mineral: Cu4O2(As,V)O4Cl.
angulate element . An arched pectiniform conodont element with two primary processes, which are anterior and posterior (TIP, 1981, pt. W, supp.2).
dynamogranite (dy''-na-mo-gran'-ite). A seldom-used term for an augen gneiss containing much microcline and orthoclase (Krivenko and Lapchik, 1934).
Permian (Per'-mi-an). The uppermost system of the Paleozoic Erathem of the Standard Global Chronostratigraphic Scale, above the Carboniferous and below the Triassic System of the Mesozoic Erathem. Also the time during which these rocks were formed, the Permian Period, covering the time span between 295 and 250 Ma. It is named after the province of Perm, Russia, where rocks of this age were first studied.
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