rheology (rhe-ol'-o-gy). The study of the deformation or flow of matter and the relationship between stress and strain and the responses of rock to deformation, including elastic, brittle, viscous, and plastic behaviors.
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cala [coast] (ca'-la). A short, narrow ria formed in a limestone coast; a small semicircular shallow bay along a cala coast, as along the coast of Majorca. Etymol: Spanish, "cove, small bay, inlet". See also: caleta [coast].
gauge pressure . Pressure above one atmosphere.
greenstone [sed] . A compact, nonoolitic, relatively pure chamosite mudstone interbedded with oolitic ironstone in the Lower Jurassic of Great Britain.
balance year . The period from the time of minimum mass in one year to the time of minimum mass in the succeeding year for a glacier; the period of time between the formation of one summer surface and the next. See also: net balance. Syn: budget year.
artesian province . A region within which structure, stratigraphy, topography, and climate combine to produce conditions favorable to the existence of one or more artesian aquifers; e.g. the Atlantic and Gulf Coastal Plain.
double tombolo . Two separate bars or barriers connecting an island (usually of large extent and close to the shore) with the mainland. Cf: tombolo.
Laue group . One of eleven subsets of the 32 crystal classes, obtained by adding a center of symmetry to each class. This is the symmetry of the weighted reciprocal lattice , except in cases where Friedel's law is violated by the effects of anomalous dispersion.
Tremadocian (Tre-ma-do'-cian). A series or stage of the Standard Global Chronostratigraphic Scale: lowermost Ordovician (above Cambrian). The basal GSSP is in Newfoundland (Cooper et al., 2001). Also spelled: Tremadoc.
Cambrian evolutionary fauna . The classes of marine invertebrates which account for the bulk of marine diversity during the Cambrian Period, includes trilobites, inarticulate brachiopods, and monoplacophoran molluscs.