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Shield (geology) A shield is a large area of exposed Precambrian crystalline igneous and high-grade metamorphic rocks that form tectonically stable areas. [1] These rocks are older than 570 million years and sometimes date back to around 2 to 3.5 billion years. [citation needed]
The Canadian Shield is a broad region of Precambrian rock (pictured in shades of red) that encircles Hudson Bay. It spans eastern, northeastern, and east-central Canada and the upper midwestern United States. The Canadian Shield (French: Bouclier canadien [buklje kanadjɛ̃]), also called the Laurentian Shield or the Laurentian Plateau, is a ...
A shield volcano is a type of volcano named for its low profile, resembling a shield lying on the ground. It is formed by the eruption of highly fluid (low viscosity) lava, which travels farther and forms thinner flows than the more viscous lava erupted from a stratovolcano.
Arabian-Nubian Shield. (Western) Australian Shield. Baltic Shield of Scandinavia and Eastern Europe. Canadian Shield a.k.a. Laurentian Shield. The China-Korean Shield containing the North China Craton. The East Antarctic Shield containing the East Antarctic Craton. Indian Shield.
Platform (geology) In geology, a platform is a continental area covered by relatively flat or gently tilted, mainly sedimentary strata, which overlie a basement of consolidated igneous or metamorphic rocks of an earlier deformation. Platforms, shields and the basement rocks together constitute cratons. [1] Platform sediments can be classified ...
The Australian Shield is a geological feature known as a shield that occupies more than half of the continent of Australia. The word shield is used because it refers to ancient, molten rock which has cooled and solidified. [1] The Australian Shield has a characteristic depth of 4.5 kilometres (2.8 mi) and an estimated age of 2.8 to 3.5 billion ...
Last eruption. September 15–20, 2024. Kīlauea (US: / ˌkɪləˈweɪə / KIL-ə-WAY-ə, Hawaiian: [kiːlɐwˈwɛjə]) is an active shield volcano in the Hawaiian Islands. It is located along the southeastern shore of Hawaii Island. The volcano is between 210,000 and 280,000 years old and grew above sea level about 100,000 years ago.
Geologic province. A geologic province is a spatial entity with common geologic attributes. [1] A province may include a single dominant structural element such as a basin or a fold belt, or a number of contiguous related elements. Adjoining provinces may be similar in structure but be considered separate due to differing histories.