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White veins in dark rock at Imperia, Italy. In geology, a vein is a distinct sheetlike body of crystallized minerals within a rock. Veins form when mineral constituents carried by an aqueous solution within the rock mass are deposited through precipitation. The hydraulic flow involved is usually due to hydrothermal circulation. [1]
The Big Vein refers to a 14-foot (4.3 m) thick seam of bituminous coal discovered in the Georges Creek Valley of Western Maryland in the early 19th century. This coal vein became famous for its clean-burning low sulfur content that made it ideal for powering ocean steamers, river boats, locomotives, steam mills, and machine shops.
Vena amoris is a Latin name meaning, literally, "vein of love." It describes a special blood vein that was once believed to flow directly from the fourth finger of the left hand to the heart. [1] This belief has been cited in Western cultures as one of the reasons the engagement ring and/or wedding ring was placed on the fourth finger, or "ring ...