eustasy

plural eustasies · alternative eustacy

1. geographyA worldwide change in sea level, especially one caused by melting ice or tectonic activity.First known use 1940s

   Glaciation, by oversteepening slopes, and by subsequent isostatic rebound, greatly enhances crevice cave and talus cave formation. Glacial eustasy and isostatic rebound form, and then preserve, sea caves.

   2015, M. P. Cooper, J[ohn] E. Mylroie, “Pseudokarst and Non-dissolutional Caves”, in Glaciation and Speleogenesis: Interpretations from the Northeastern United States (Cave and Karst Systems of the World), Cham, Switzerland: Springer International Publishing AG Switzerland, →DOI, →ISBN, part II (Cave and Karst Regions of the Northeastern US), abstract, page 49

   5 more examples

   The age of the dunal or other deposits, formed on it after the sea had begun to withdraw, in accordance with the theory of glacial eustasy, and which I have named Berardian, is, however, the crucial thing here.

   1946, The Journal of the Anthropological Institute of Great Britain and Ireland, volumes 76–77, London: The Royal Anthropological Institute of Great Britain and Ireland, →ISSN, →OCLC, page 116, column 1

   Takai, F., and Tsuchi, R. 1963 The Quaternary: In "Geology of Japan," Univ. Calif. Press: 173–196 / […] From these facts, it is inferred that the main coastal terraces were probably formed due to glacial eustacy.

   1965, Horace G. Richards, Rhodes W[hitmore] Fairbridge, Annotated Bibliography of Quaternary Shorelines (1945–1964): Prepared for the VII International Congress of International Association for Quaternary Research (INQUA) Meeting at Boulder, Colorado, August 30 – September 5, 1965 (Special Publication; 6), Philadelphia, Pa.: Academy of Natural Sciences, →OCLC, page 250

   The range in elevation suggests that the sea level was not constant during the formation of the caves and that the rise of land – perhaps counterbalanced periodically by glacial eustacies – was probably continuous.

   1968, Asian Perspectives: A Journal of Archaeology and Prehistory of Asia and the Pacific, volume 12, Honolulu, Hi.: University Press of Hawaii, →ISSN, →OCLC, page 133, column 2

   Although the origin of these long-term accommodation changes is difficult to assess, we conclude that basin tectonism is responsible for these changes in most of our examples. Long-term eustasy plays a secondary role, according to our analysis.

   1993, Stephen M. Greenlee, Patrick J. Lehmann, “Stratigraphic Framework of Productive Carbonate Buildups”, in Robert G. Loucks, J. Frederick Sarg, editors, Carbonate Sequence Stratigraphy: Recent Developments and Applications (AAPG Memoir; 57), Tulsa, Okla.: The American Association of Petroleum Geologists, →ISBN, abstract, page 43

   In summary, because modern continental settings lack a hydrology suitable for supplying huge volumes of brine, sufficient to form a megasalt deposit, neither modern sabkhas or salinas are directly relevant to the formation of the hydrologies and eustasies needed to deposit the huge masses of ancient marine-fed subaqueous salts detailed in Chap. 5.

   2016, John K. Warren, “Subaqueous Salts: Salinas and Perennial Lakes”, in Evaporites: A Geological Compendium, 2nd edition, Cham, Switzerland: Springer International Publishing AG Switzerland, →DOI, →ISBN, page 380