Glauconitic Sandstone
Greensand or green sand is a sand or sandstone which has a greenish color. This term is specifically applied to shallow marine sediment that contains noticeable quantities of rounded greenish grains. These grains are called ''glauconies'' and consist of a mixture of mixed-layer clay minerals, such as smectite and glauconite. Greensand is also loosely applied to any glauconitic sediment. Formation Greensand forms in anoxic marine environments that are rich in organic detritus and low in sedimentary input. Having accumulated in marine environments, greensands can be fossil-rich, such as in the late-Cretaceous deposits of New Jersey. Occurrence Important exposures are known from both northern and western Europe, North America, southeastern Brazil and north Africa. Well known and important greensands are the Upper and Lower Greensands of England and occur within Eocene and Cretaceous sedimentary strata underlying the coastal plains of New Jersey and Delaware. Although greensand has ...
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Estonian Museum Of Natural History Specimen No 173341 Photo (g1 G1-1623 1 Jpg)
Estonian may refer to: * Something of, from, or related to Estonia, a country in the Baltic region in northern Europe * Estonians, people from Estonia, or of Estonian descent * Estonian language * Estonian cuisine * Estonian culture See also * * Estonia (other) * Languages of Estonia * List of Estonians This is a list of notable Estonians. Architects * Andres Alver (born 1953) *Dmitri Bruns (1929–2020) * Karl Burman (1882–1965) * Eugen Habermann (1884–1944) *Georg Hellat (1870–1943) *Otto Pius Hippius (1826–1883) * Erich Jacoby (1885†... {{Disambiguation Language and nationality disambiguation pages ...
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