chert

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Words related to chert

variety of silica containing microcrystalline quartz

References in periodicals archive ?
Summer distribution, resources, recommendations for future harvest, and some biological features of Steller sea lions on the Kuril Islands[Letnee raspredelenie, zapasy, perspektivy promysla i nekotorye cherty biologii sivucha, obitayushchego na Kuril'skikh ostrovakh].
1), in ascending order: (1) Fusselman Formation, (2) Wristen Formation--the "upper Silurian shale" of older works, and (3) Thirtyone Formation--the "Devonian cherty limestone" of older works.
The gold mineralization occurs within narrow cherty quartz veins.
To mention only two of them, Meltzer (1963) and Laidler (1966) consider that definition of money the most appropriate which gives the most stable demand function for money while Cherty (1969), Moroney and Wilberatte (1976), Boughton (1981) and Husted and Rush (1984) infer their definition of money on the basis of the degree of substitutability between narrowly defined money and other financial assets.
This unit makes up the youngest rocks in the site and consists of thin to thick layers of tightly folded limestone layers of clay and sometimes cherty limestone with thick bands of rock.
2), consists of hyaloclastic mafic volcanic rocks interbedded with locally brecciated, green cherty mudstone.
3 grams of gold per tonne was historically used for the Cherty and 160E Zones.
Species: Birch, cherty, hard & soft maple Machining: Assembly, CNC Machining, embossing, finishing, mortising, routing, CNC routing, face & edge sanding, shaping, tenoning
An interval of cherty sedimentary rocks marks the contact and serves as an important stratigraphic marker for further exploration.
All four sites contain a Fullerton series soil type consisting of deep, well-drained cherty soils that formed in dolomite.
Raj Cherty was recipient of a Smith Richardson Public Policy Fellowship, one of three given annually to young economists working in public economics and public policy in the United States.
The first type is found throughout the mineral deposit it appears to be a random mixture of limestones, marls, clays, cherts and low-grade phosphate with large amounts of cherty limestone.
See, for example, Bernheim and Wantz (1995), Poterba (2004), Cherty and Saez (2004), and Poterba and Summers (1985), as well as the opposing evidence in Bolster and Janjigian (1991), Blouin, Raedy, and Shackelford (2004), and Ikenberry and Julio (2004).