To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
Languages
Recent
Show all languages
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
.
Leo
Newton
Brights
Milds

Engadin window

From Wikipedia, the free encyclopedia

Overview of the Engadin window and the surrounding austroalpine units.

The Engadin window or (Lower Engadin window) is a tectonic window that exposes penninic units lying below the austroalpine units in the alpine nappe stack. It has a roughly elliptical shape with the long axis striking northwest-southeast and dimensions of 55 x 17 km.[1]

From a geographic perspective the window stretches from Zernez (Graubünden, Switzerland) to Landeck (Tirol, Austria), or the Lower Engadin.

Overview

The rocks cropping out in the Engadin window are weakly metamorphosed sediments of middle Jurassic to Eocene age. Most of them are interpreted as deposits from turbidites.[2] They are seen as part of the penninic units similar to the rocks that make up large portions of the Switzerland. Furthermore, the sediments are attributed to the Valais ocean, the Briançonnais microcontinent, and the Piemont-Liguria Ocean.[1] The metamorphic overprint was caused by the closure of the Valais and the Piemont-Liguria during the Paleogene part of the Alpine orogeny. The rocks experienced low-temperature-high-pressure overprint which reached the blueschist facies.[3]

On geologic maps the Engadine window has an onion shell appearance. From outside to inside, or from highest to lowest in the nappe stack, the following units are distinguished:

  • Fimber zone (including Arosa zone)
  • Tasna zone
  • Champatsch zone
  • Pfundser zone

Other tectonic windows

The Engadin window is not the only place where penninic units are exposed within the austroalpine. The Tauern window is the largest one and lies east of the Engadin window. The Gargellen window in Vorarlberg is the smallest one. The Rechnitzer window is the easternmost tectonic window.[1]

References

  1. ^ a b c Schmid, Stefan M.; Fügenschuh, Bernhard; Kissling, Eduard; Schuster, Ralf (30 April 2004). "Tectonic map and overall architecture of the Alpine orogen". Eclogae Geologicae Helvetiae. 97 (1): 93–117. Bibcode:2004SwJG...97...93S. doi:10.1007/s00015-004-1113-x.
  2. ^ Waibel, A.F.; Frisch, W. (30 April 1989). "The Lower Engadine Window: sediment deposition and accretion in relation to the plate-tectonic evolution of the Eastern Alps". Tectonophysics. 162 (3–4): 229–241. Bibcode:1989Tectp.162..229W. doi:10.1016/0040-1951(89)90246-1.
  3. ^ Bousquet, Romain. "Metamorphic structure of the Alps - Revised version". Retrieved 23 February 2013.

46°58′15″N 10°23′15″E / 46.97083°N 10.38750°E / 46.97083; 10.38750

This page was last edited on 13 April 2024, at 07:35
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.