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Baltic Shield

A region underlain by Precambrian rocks that covers the Kola Peninsula in western Russia, Finland, Sweden, and Norway. The region extends from the Arctic Ocean to the island of Bornholm, ...

Baltic Shield

Baltic Shield   Quick reference

A Dictionary of Ecology (5 ed.)

Reference type:
Subject Reference
Current Version:
2015
Subject:
Science and technology, Life Sciences, Social sciences, Environment
Length:
112 words
Illustration(s):
1

... Shield ( Baltica , Baltoscandia , Fenno-scandia ) A region underlain by Precambrian rocks that covers the Kola Peninsula in western Russia, Finland, Sweden, and Norway. The region extends from the Arctic Ocean to the island of Bornholm, in the Baltic Sea off the southern tip of Sweden, and from the eastern coast of the Kola Peninsula to the westernmost tip of Norway. This continental mass once formed the south-eastern margin of the Iapetus Ocean . The subduction of this ocean during the Silurian and early Devonian brought the Baltic Shield into...

Baltic Shield

Baltic Shield  

A region underlain by Precambrian rocks that covers the Kola Peninsula in western Russia, Finland, Sweden, and Norway. The region extends from the Arctic Ocean to the island of Bornholm, in the ...
shield

shield  

The very old, rigid core of relatively stable rocks within a continent. See Stein (2003) Precamb. Res. 123, 1–2 on the formation of the Arabian-Nubian Shield, and Lidmar-Bergström (1995) Geomorph. ...
Gothian

Gothian  

A stage of the Lower Proterozoic, from about 2100–1600 Ma ago, of the Baltic Shield region, underlain by the Svecofennian and overlain by the Jotnian. According to Van Eysinga, 1975, Gothian is ...
Jotnian

Jotnian  

A stage of the Middle–Upper Proterozoic, from about 1600 to 650 Ma ago, of the Baltic Shield region, underlain by the Gothian and overlain by the Varangian.
Jotnian orogeny

Jotnian orogeny  

An episode of mountain building that involved the Proterozoic sedimentary rocks of the Baltic Shield in what is now Scandinavia.
Karelian orogeny

Karelian orogeny  

An Archaean episode of mountain building affecting the Baltic Shield along a NW–SE line in what is now central Finland. It began about 2000 Ma ago and ended about 1900 Ma ago.
Svecofennian

Svecofennian  

A stage of the Lower Proterozoic, from about 2600 to 2100Maago, overlain by the Gothian (equivalent to the Karelian according to Van Eysinga, 1975) from the Baltic Shield region.
Muschelkalk

Muschelkalk  

1 The sea-way (Muschelkalk Sea) that extended across north-western Europe during the Triassic, from the present-day UK in the west to northern Germany and Poland in the east. It was bordered to the ...
shield

shield   Quick reference

A Dictionary of Geography (5 ed.)

Reference type:
Subject Reference
Current Version:
2015

... The very old, rigid core of relatively stable rocks within a continent. See Stein (2003) Precamb. Res. 123, 1–2 on the formation of the Arabian-Nubian Shield , and Lidmar–Bergström (1995) Geomorph. 12, 1 on the Baltic Shield...

Jotnian orogeny

Jotnian orogeny   Quick reference

A Dictionary of Geology and Earth Sciences (4 ed.)

Reference type:
Subject Reference
Current Version:
2013

...orogeny An episode of mountain building that involved the Proterozoic sedimentary rocks of the Baltic Shield in what is now...

Jotnian

Jotnian   Quick reference

A Dictionary of Geology and Earth Sciences (4 ed.)

Reference type:
Subject Reference
Current Version:
2013

... A stage of the Middle Riphean , from about 1400 to 1250 Ma ago, of the Baltic Shield region, underlain by the Gothian and overlain by the Varangian...

Svecofennian

Svecofennian   Quick reference

A Dictionary of Geology and Earth Sciences (4 ed.)

Reference type:
Subject Reference
Current Version:
2013

... A stage of the Lower Proterozoic , from about 2600 to 2100 Ma ago, overlain by the Gothian (equivalent to the Karelian according to Van Eysinga, 1975 ) from the Baltic Shield...

Gothian

Gothian   Quick reference

A Dictionary of Geology and Earth Sciences (4 ed.)

Reference type:
Subject Reference
Current Version:
2013

... A stage of the Lower Proterozoic , from about 2100–1600 Ma ago, of the Baltic Shield region, underlain by the Svecofennian and overlain by the Jotnian . According to Van Eysinga , 1975 , Gothian is synonymous with...

Karelian orogeny

Karelian orogeny   Quick reference

A Dictionary of Geology and Earth Sciences (4 ed.)

Reference type:
Subject Reference
Current Version:
2013

...orogeny An Archaean episode of mountain building affecting the Baltic Shield along a NW–SE line in what is now central Finland. It began about 2000 Ma ago and ended about 1900 Ma...

Svecofennian orogeny

Svecofennian orogeny   Quick reference

A Dictionary of Geology and Earth Sciences (4 ed.)

Reference type:
Subject Reference
Current Version:
2013

...orogeny An early to middle Proterozoic mountain-building episode that affected the Baltic Shield, in what are now Sweden and southern Finland, and that occurred approximately 1900–1800 Ma ago, at approximately the same time as the Hudsonian and Laxfordian ...

Aapa mires

Aapa mires   Quick reference

A Dictionary of Ecology (5 ed.)

Reference type:
Subject Reference
Current Version:
2015

...mires Fens , sometimes called ‘string bogs’, of circumpolar distribution, found in Fennoscandia ( see Baltic Shield ) and boreal Canada. They are soligenous mires with ridges arranged roughly normal to the slope, along the contours of the terrain. Water occupies the linear depressions between the...

Precambrian

Precambrian   Quick reference

A Dictionary of Biology (8 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Life Sciences
Length:
144 words

...that there were flourishing populations of cyanobacteria and other bacteria. However, subsequent metamorphism of Precambrian rocks makes correlation of rocks and events extremely difficult. The largest areas of exposed Precambrian rocks are the shield areas, such as the Canadian (Laurentian) Shield and the Baltic Shield. http://www.ucmp.berkeley.edu/precambrian/archean_hadean.php Perspectives on Precambrian time provided by the website of the University of California Museum of...

Pruce

Pruce   Reference library

The Oxford Companion to Chaucer

Reference type:
Subject Reference
Current Version:
2005

..., Pruyse , Prussia , a land along the Baltic coast between the rivers Vistula and Niemen. The name was originally applied to the home of a pagan people around the mouth of the Vistula; by the 14th c. it referred to a larger area, a monastic republic administered by the Knights of the Teutonic Order. Chaucer's Knight fought there with the Teutonic Knights (I.53; see crusades ). Some of Palamon's knights have ‘a Pruce sheeld’ (a Prussian shield; I.2122). The land is also mentioned in The Book of the Duchess (1025) as a remote...

Precambrian

Precambrian   Quick reference

A Dictionary of Zoology (4 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Life Sciences
Length:
96 words

...the Cambrian Period 542 Ma ago. The Precambrian lasted approximately 4000 Ma; the rocks of this period of geological time are usually altered and few fossils with hard parts or skeletons have been found within them. Precambrian rocks outcrop extensively in shield areas such as northern Canada and the Baltic Sea. In modern usage the Precambrian is subdivided into the Hadean , Archaean , and Proterozoic . ...

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