- precambrian shield
- noun
Usage: usually capitalized P: the nuclear area of Precambrian rocks present in each of the continents
Useful english dictionary. 2012.
precambrian shield
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Shield (disambiguation) — Shield may refer to:Protection* Shield, a hand held protective device meant to intercept attacks * Electromagnetic shielding * Shielded cable * Energy shield * Deflector shield, a protective energy field * Heat shield, which protects a spacecraft … Wikipedia
Precambrian time — Interval of geologic time from с 3. 8 billion years ago, the age of the oldest known rocks, to 544 million years ago, the beginning of the Cambrian Period. This interval represents more than 80% of the geologic record and thus provides important… … Universalium
Shield (geology) — Geologic provinces of the world (USGS) Shiel … Wikipedia
Precambrian — For the album by German band The Ocean, see Precambrian (album). Precambrian Period 4567.17–542 million years ago … Wikipedia
shield — n. & v. n. 1 a esp. hist. a piece of armour of esp. metal, carried on the arm or in the hand to deflect blows from the head or body. b a thing serving to protect (insurance is a shield against disaster). 2 a thing resembling a shield, esp.: a a… … Useful english dictionary
shield — I. noun Etymology: Middle English sheld, from Old English scield; akin to Old High German scilt shield and probably to Old English sciell shell Date: before 12th century 1. a broad piece of defensive armor carried on the arm 2. one that protects… … New Collegiate Dictionary
shield — noun 1》 a broad piece of armour held by straps or a handle on one side, used for protection against blows or missiles. ↘Heraldry a stylized representation of a shield used for displaying a coat of arms. 2》 a sporting trophy consisting of an… … English new terms dictionary
Canadian Shield — noun An area of very old bedrock surrounding Hudson Bay, and covering about half the land area of Canada. Syn: Laurentian Shield, Laurentian Plateau, Precambrian Shield … Wiktionary
continental shield — Any of the large stable areas of low relief (little variation in elevations) in the Earth s crust that are composed of Precambrian crystalline rocks. These rocks are always more than 570 million years old, and some are as old as 2–3 billion years … Universalium
Baltic Shield — The Baltic Shield (sometimes referred to as the Fennoscandian Shield) is located in Fennoscandia (Norway, Sweden and Finland), northwest Russia and under the Baltic Sea. The Baltic Shield is defined as the exposed Precambrian northwest segment of … Wikipedia
