exige a sua mapeabilidade na escala 1: 25.000.554) uniformitarianism: The hypothesis that current geologic processes, such as the slow erosion of a coast under the impact of waves, have been occurring in a similar manner throughout the Earth's history and that these processes can account for past geologic events. See also c555) uniformitarismo: [ Atualismo] Um dos principios basilares da ciencia geologica e o do uniformitarismo segundo o qual "o presente e a chave do passado", ou seja, as leis da natureza sao constantes de modo a que o estudo dos registros geologicos, essencialmente rochas e suas estruturas, decorrentes de processos atuais permite se interpretar a evolucao geologica a partir de registros geologicos antigos. Este principio, hoje, e adequado a novos conhecimentos que indicam ter existido variacoes de intensidade e/ou velocidade de processos geologicos como, por exemplo, a duracao de um dia solar menor no passado, o gradiente geotermico terrestre, maior no passado quando existiam mais elementos radiativos aquecendo a crosta terrestre,..556) UNSTRATIFIED: (popular) In geology, unstratified describes rocks which are tot stratified, and is applied to massive rocks, such as granite, porphyry, etc., and also to deposits of loose material, such as the glacial till, which occur in masses without layers or strata557) UPLIFT: (popular) In geology an uplift is a raising or upheaval of strata so as to disturb their regularity and uniformity, and to occasion folds, dislocations, and the like. URALITE558) varvito: Rocha sedimentar de origem glacial fluvio/lacustrina estruturada em varves. O conjunto de camadas, ritmicamente alternadas forma um deposito sedimentar com otima estratificacao ritmica (ritmito) sendo que cada varve representa um ano. Nos varvitos e comum a ocorrencia de seixos pingados. [Ver mais detalhes na descricao de um sitio geologico brasileiro Varvito de Itu,SP]559) vector: (GIS) A coordinate-based data structure commonly used to represent linear geographic features. Each linear feature is represented as an ordered list of vertices. Traditional vector data structures include double-digitized polygons and arc-node models.560) VEIN: (popular) In geology a vein is a narrow mass of rock intersecting other rocks, and filling inclined or vertical fissures not corresponding with the stratification561) Vidro Natural: (gemologia) Substancia amorfa, vitrea, que ocorre na natureza como resultado de eventos geologicos particulares, como, por exemplo, vulcanismo (e.g. obsidiana), um impacte meteoritico (e.g. moldavita).562) volcanism: The set of geological processes that result in the expulsion of lava, pyroclastics, and gases at the Earth's surface.563) VPF: (GIS) Vector product format is a digital geographic vector-based format used by the U.S. Defense Mapping Agency for the distribution of its vector data sets. ArcInfo includes a bidirectional VPF translator.564) Vulcanologia: E o ramo da Geologia que trata dos fenomenos e causas do vulcanismo. (Bates e Jackson, 1987, p. 727)565) WASH: (popular) In geology the term wash describes gravel and other rock debris transported and deposited by running water566) WEBSTERITE: (popular) Websterite (also known as aluminite, hallite) is a white or grey nodular hydrous mineral named after the geologist Webster, is a hydrous sulphate of alumina occurring in white reniform masses. Websterite forms monoclinic crystals, generally too567) workspace: (GIS) A directory containing geographic data sets