fine-grained iron

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• Iron ore — Iron ores are rocks and minerals from which metallic iron can be economically extracted. The ores are usually rich in iron oxides and vary in colour from dark grey, bright yellow, deep purple, to rusty red. The iron itself is usually found in the …   Wikipedia

• Silvery iron — Silvery Sil ver*y, a. 1. Resembling, or having the luster of, silver; grayish white and lustrous; of a mild luster; bright. [1913 Webster] All the enameled race, whose silvery wing Waves to the tepid zephyrs of the spring. Pope. [1913 Webster] 2 …   The Collaborative International Dictionary of English

• branded iron formation — noun a formation found in sedimentary rocks dating from before the Cambrian period, characterised by alternating thin layers of fine grained quartz, iron oxides, carbonate materials, and chert; found in the Hamersley Range. Abbrev.: BIF …  

• silvery iron — noun : a peculiar light gray fine grained variety of cast iron of high silicon content …   Useful english dictionary

• Clinton Group — Stratigraphic range: Late Silurian Rocks of the Clinton Group on the east face of Schuylkill Gap Type sedimentary Sub units Rochester Shale …   Wikipedia

• sedimentary rock — Rock formed at or near the Earth s surface by the accumulation and lithification of fragments of preexisting rocks or by precipitation from solution at normal surface temperatures. Sedimentary rocks can be formed only where sediments are… …   Universalium

• military technology — Introduction       range of weapons, equipment, structures, and vehicles used specifically for the purpose of fighting. It includes the knowledge required to construct such technology, to employ it in combat, and to repair and replenish it.… …   Universalium

• igneous rock — Any of various crystalline or glassy, noncrystalline rocks formed by the cooling and solidification of molten earth material (magma). Igneous rocks comprise one of the three principal classes of rocks, the others being metamorphic and sedimentary …   Universalium

• Igneous rock — Geologic provinces of the world (USGS)   Shield …   Wikipedia

• Cornubian batholith — Map showing the main granite outcrops of the Cornubian batholith in southwest England and the location of Haig Fras the 20 mGal Bouguer anomaly is also shown as this indicates the location of the negative anomalies associated with these… …   Wikipedia

• Chondrite — Not to be confused with Chondrodite. A specimen of the NWA 869 chondrite (type L4 6), showing chondrules and metal flakes Chondrites are stony meteorites that have not been modified due to melting or differentiation of the parent body. They… …   Wikipedia