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Flagstone Bench Formation
Flagstone (flag) is a generic flat stone, sometimes cut in regular rectangular or square shape and usually used for paving slabs or walkways, patios, flooring, fences and roofing. It may be used for memorials, headstones, facades and other construction. The name derives from Middle English ''flagge'' meaning ''turf'', perhaps from Old Norse ''flaga'' meaning ''slab'' or ''chip''. Flagstone is a sedimentary rock that is split into layers along bedding planes. Flagstone is usually a form of a sandstone composed of feldspar and quartz and is arenaceous in grain size (0.16 mm – 2 mm in diameter). The material that binds flagstone is usually composed of silica, calcite, or iron oxide. The rock color usually comes from these cementing materials. Typical flagstone colors are red, blue, and buff, though exotic colors exist. Flagstone is quarried in places with bedded sedimentary rocks with fissile bedding planes. Around the thirteenth century, the ceilings, walls and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portage Park Chicago Flagstone Steps
Portage or portaging (Canadian English, CA: ; ) is the practice of carrying water craft or cargo over land, either around an obstacle in a river, or between two bodies of water. A path where items are regularly carried between bodies of water is also called a ''portage.'' The term comes from French, where means "to carry", as in "portable". In Canada, the term "carrying-place" was sometimes used. Early French explorers in New France and Louisiana (New France), French Louisiana encountered many rapids and Fan waterfalls, cascades. The Indigenous peoples of the Americas, Native Americans carried their canoes over land to avoid river obstacles. Over time, important portages were sometimes provided with canals with canal lock, locks, and even portage railways. Primitive portaging generally involves carrying the vessel and its contents across the portage in multiple trips. Small canoes can be portaged by carrying them inverted over one's shoulders and the center thwart, strut may be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
