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A boundary marker, border marker, boundary stone, or border stone is a robust physical marker that identifies the start of a land boundary or the change in a boundary, especially a change in direction of a boundary. [1] There are several other types of named border markers, known as boundary trees, [2] [3] pillars, monuments, obelisks, and ...
An inuksuk at the Foxe Peninsula, Nunavut, Canada. An inuksuk (plural inuksuit) [1] or inukshuk [2] (from the Inuktitut: ᐃᓄᒃᓱᒃ, plural ᐃᓄᒃᓱᐃᑦ; alternatively inukhuk in Inuinnaqtun, [3] iñuksuk in Iñupiaq, inussuk in Greenlandic) is a type of stone landmark or cairn built by, and for the use of, Inuit, Iñupiat, Kalaallit, Yupik, and other peoples of the Arctic region of ...
Hazard symbols; List of mathematical constants (typically letters and compound symbols) Glossary of mathematical symbols; List of physical constants (typically letters and compound symbols) List of common physics notations (typically letters used as variable names in equations) Rod of Asclepius / Caduceus as a symbol of medicine
An Ordnance Survey cut mark in the UK Occasionally a non-vertical face, and a slightly different mark, was used. The term benchmark, bench mark, or survey benchmark originates from the chiseled horizontal marks that surveyors made in stone structures, into which an angle iron could be placed to form a "bench" for a leveling rod, thus ensuring that a leveling rod could be accurately ...
The word cairn derives from Scots cairn (with the same meaning), in turn from Scottish Gaelic càrn, which is essentially the same as the corresponding words in other native Celtic languages of Britain, Ireland and Brittany, including Welsh carn (and carnedd), Breton karn, Irish carn, and Cornish karn or carn. [2]
Also called Indianite. A mineral from the lime-rich end of the plagioclase group of minerals. Anorthites are usually silicates of calcium and aluminium occurring in some basic igneous rocks, typically those produced by the contact metamorphism of impure calcareous sediments. anticline An arched fold in which the layers usually dip away from the fold axis. Contrast syncline. aphanic Having the ...
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Mineral symbols (text abbreviations) are used to abbreviate mineral groups, subgroups, and species, just as lettered symbols are used for the chemical elements. The first set of commonly used mineral symbols was published in 1983 and covered the common rock-forming minerals using 192 two- or three-lettered symbols. [ 1 ]