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The keystone (shown in red) of an arch Dropped keystone at Colditz Castle. A keystone (or capstone) is the wedge-shaped stone at the apex of a masonry arch or typically round-shaped one at the apex of a vault. In both cases it is the final piece placed during construction and locks all the stones into position, allowing the arch or vault to ...
A cultural keystone species is one which is of exceptional significance to a particular culture or a people. Such species can be identified by their prevalence in language, cultural practices (e.g. ceremonies), traditions, diet, medicines, material items, and histories of a community.
Design of the keystone symbol on the Pennsylvania government's website [1]. The keystone symbol is the name commonly given to the de-facto state emblem of Pennsylvania. [2] It is a stylized keystone (or capstone), an architectural term for a wedge-shaped stone placed at the top of an arch. [3]
The keystone is the centre stone or masonry unit at the apex of an arch. The springer is the lowest voussoir on each side, located where the curve of the arch springs from the vertical support or abutment of the wall or pier. [1] The keystone is often decorated or enlarged.
"Today, we take an important step toward recovering from the tragic Francis Scott Key Bridge collapse that has affected not just Maryland's economy, but the nation's economy," said Gov. Moore.
By now, you have probably heard about TransCanada's Keystone XL pipeline. For even the most casual observer of the energy industry, this project has been the spark that has ignited political ...
Nearly a year after Baltimore's Francis Scott Key Bridge collapsed, the Maryland Transportation Authority and Gov. Wes Moore have unveiled the new design for the historic wonder.. At a news ...
The keystone concept is defined by its ecological effects, and these in turn make it important for conservation. In this it overlaps with several other species conservation concepts such as flagship species, indicator species, and umbrella species. For example, the jaguar is a charismatic big cat which meets all of these definitions: [11]