concretionary structure

См. также в других словарях:

• Globuliferous — Glob u*lif er*ous, a. [Globule + ferous.] Bearing globules; in geology, used of rocks, and denoting a variety of concretionary structure, where the concretions are isolated globules and evenly distributed through the texture of the rock. [1913… …   The Collaborative International Dictionary of English

• Pearlite — Pearl ite, Pearlstone Pearl stone , n. (Min.) A glassy volcanic rock of a grayish color and pearly luster, often having a spherulitic concretionary structure due to the curved cracks produced by contraction in cooling. See Illust. under… …   The Collaborative International Dictionary of English

• Pearlstone — Pearlite Pearl ite, Pearlstone Pearl stone , n. (Min.) A glassy volcanic rock of a grayish color and pearly luster, often having a spherulitic concretionary structure due to the curved cracks produced by contraction in cooling. See Illust. under… …   The Collaborative International Dictionary of English

• Marcellus Formation — Stratigraphic range: Middle Devonian …   Wikipedia

• Concretion — For other uses, see enterolith and nodule (geology). Septaria redirects here. For the genus of gastropods, see Septaria (gastropod). Concretions on Bowling Ball Beach (Mendocino County, California) weather out of steeply tilted Cenozoic mudstone… …   Wikipedia

• oolite — oolitic /oh euh lit ik/, adj. /oh euh luyt /, n. Geol. a limestone composed of minute rounded concretions resembling fish roe, in some places altered to ironstone by replacement with iron oxide. Also called egg stone. [1775 85; ( < F oölithe) …   Universalium

• Calcite — A one inch Calcite Rhomb that shows the Double image refraction property. General Category Carbonate mineral …   Wikipedia

• Limonite — is an ore consisting in a mixture of hydrated iron(III) oxide hydroxide of varying composition. The generic formula is frequently written as FeO(OH)·nH2O, although this is not entirely accurate as limonite often contains a varying amount of oxide …   Wikipedia

• Anhydrite — Not to be confused with anhydride. Anhydrite Anhydrite, Chihuahua, Mexico General …   Wikipedia

• John Arthur Phillips — Infobox Scientist name = John Arthur Phillips box width = image width = caption = birth date = birth date|1822|02|18 birth place = Polgooth, Cornwall death date = dda|1887|01|05|1822|02|18 death place = London residence = citizenship = British… …   Wikipedia

• chalcedony — chalcedonic /kal si don ik/, chalcedonous, adj. /kal sed n ee, kal seuh doh nee/, n., pl. chalcedonies. a microcrystalline, translucent variety of quartz, often milky or grayish. [1275 1325; ME calcedonie < LL chalcedonius (Vulgate, Rev. XIX, 19) …   Universalium