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Exophoria. Exophoria is a form of heterophoria in which there is a tendency of the eyes to deviate outward. [1] During examination, when the eyes are dissociated, the visual axes will appear to diverge away from one another. [2] The axis deviation in exophoria is usually mild compared with that of exotropia.
Prism (geometry) In geometry, a prism is a polyhedron comprising an n-sided polygon base, a second base which is a translated copy (rigidly moved without rotation) of the first, and n other faces, necessarily all parallelograms, joining corresponding sides of the two bases. All cross-sections parallel to the bases are translations of the bases.
Columnar jointing. Columnar jointing is a geological structure where sets of intersecting closely spaced fractures, referred to as joints, result in the formation of a regular array of polygonal prisms (basalt prisms), or columns. Columnar jointing occurs in many types of igneous rocks and forms as the rock cools and contracts.
Dry stone, sometimes called drystack or, in Scotland, drystane, is a building method by which structures are constructed from stones without any mortar to bind them together. [1] A certain amount of binding is obtained through the use of carefully selected interlocking stones. Dry stone construction is best known in the context of stone walls ...
The Dupplin Cross is a carved, monumental Pictish stone, which dates from around 800 AD. [1][2] It was first recorded by Thomas Pennant in 1769, on a hillside in Strathearn, a little to the north of (and on the opposite bank of the River Earn from) Forteviot and Dunning. In 2002 it was placed in the care of Historic Scotland, and was placed for ...
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Charles M. Price Support Center was a United States Army base located in Granite City, Illinois, across the Mississippi River directly to the east of St. Louis. Originally selected as a site for a U.S. Army supply depot during World War I, it was not established until World War II as the Granite City Engineer Depot. The installation employed up ...
Menhir. A menhir (/ ˈmɛnhɪər /; [1] from Brittonic languages: maen or men, "stone" and hir or hîr, "long" [2]), standing stone, orthostat, or lith is a large upright stone, emplaced in the ground by humans, typically dating from the European middle Bronze Age. They can be found individually as monoliths, or as part of a group of similar ...