Search results
Results from the WOW.Com Content Network
Location of the Hercynian-Alleghenian mountain belts in the middle of the Carboniferous period.Present day coastlines are indicated in grey for reference. [1]The Variscan orogeny, or Hercynian orogeny, was a geologic mountain-building event caused by Late Paleozoic continental collision between Euramerica (Laurussia) and Gondwana to form the supercontinent of Pangaea.
The Rhenohercynian Zone or Rheno-Hercynian zone [2] in structural geology describes a fold belt of west and central Europe, formed during the Hercynian orogeny (about ). The zone consists of folded and thrust Devonian and early Carboniferous sedimentary rocks that were deposited in a back-arc basin along the southern margin of the then existing ...
Lopian orogeny – Archean orogeny – Formation of two different types of terrain compatible with plate tectonic concepts. One is a belt of high-grade gneisses formed in a regime of strong mobility, while the other is a region of granitoid intrusions and greenstone belts surrounded by the remnants of a Saamian substratum, (2.9–2.6 Ga)
This category contains articles on the Hercynian/Varsican orogeny of southern and central Europe and northern Africa. Related categories on Earth history are Category:Carboniferous and Category:Devonian.
Most important structures and zones of the Hercynian orogeny in Europe. [1]The Saxothuringian Zone, Saxo-Thuringian zone [2] or Saxothuringicum is in geology a structural or tectonic zone in the Hercynian or Variscan orogen (380-270 million years old) of central and western Europe.
Most important structures and zones of the Variscan or Hercynian Orogeny in Europe. [1]The Moldanubian Zone is in the regional geology of Europe a tectonic zone formed during the Variscan or Hercynian Orogeny (400 to 300 million years ago, during the Devonian and Carboniferous periods).
In older rocks from the lower crust intrusions are found that formed during or just after the Hercynian orogeny. These intrusions are older than the Alps and have nothing to do with their formation. Radiometric age determination yields ages around 320 Ma. Slightly younger felsic intrusions formed by Permian and Triassic extension can also be found.
The whole sequence was deformed, metamorphosed and intruded by felsic magmas during the Hercynian orogeny. The massif is cut in three by two major late Hercynian southeast-northwest striking shear zones (the North and South Armorican Shear Zones). The divisions are simply called the North, Central and South Armorican Zones. Generally the north ...