Short geology of the Monte Rosa Massif

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Short geology of the Monte Rosa Massif
Created On: Dec 16, 2007
Last Edited On: Nov 29, 2012

Geology of a given region can be viewed by means of macro- and microstudy

The main snowy peaks of the Monte Rosa massif are composed of gneisses. This mass neighbours at the Stolemberg peak with Zermatt-Saas ophiolite geological unit. Going southward to Corno Rosso this ophiolitic geology meets the Combin meta-ophiolite near Lago Gabiet. Near Rifugio Citta di Mantova the migmatisation of rocks included pseudomorphosis after cordierite. In gneiss rocks there are seen leucocratic dykes. There were here two types of parageneses, an older one characterized by high temperature and low pressure as well as a younger metamorphism made by means of high pressure. This geological activity changes many minerals, e.g. biotite, plagioclase, ilmenite and cordierite into new ones like garnet, phengite, quartz, rutile and kyanite. Between Punta Indren and Stolemberg we can observe gneisses with garnet-micaschists and eclogite stones having some amphibole coloured in blue (crossite and glaucophane). At a contact between of Monte Rosa gneisses and a Zermatt-Saas ophiolite unit on slopes of Stolemberg one can also find some eclogite rocks consisting of omphacite, garnets and amphibole. On the Stolemberg peak the metabasalts are exposed. There is, on the southern slope of Stolemberg, a close contact between the Monte Rosa gneiss and serpentinite rocks of Corno del Camoscio. Here we can find amphibolite rocks with albite, talc and chlorites as well as some inclusions of metabasites in gneiss. Corno del Camoscio has also the mylonitic gabbro rocks and micaschists enriched by chloritite, epidote and tremolite. Main types of geological units and rocks in this area are marked on the attached diagram below.

The above data are also based on:
http://virtualexplorer.com.au/journal/2004/16/martin/field.html

THIS DESCRIPTION WILL BE CONTINUED
Geology of Monte Rosa Massif






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mulidivarese

mulidivarese - Dec 17, 2007 1:21 pm - Voted 10/10

wonderfull

wonderfull interesting page
please attach it to monte rosa pages

would be nice to read it

regards
valerio

Romuald Kosina

Romuald Kosina - Dec 17, 2007 1:27 pm - Hasn't voted

Re: wonderfull

Valerio,
sorry!!! I did another comment but not as a reply.
Thanks again!!!!!
R.

Romuald Kosina

Romuald Kosina - Dec 17, 2007 1:25 pm - Hasn't voted

Hi, Valerio!!!

Many thanks for your nice appreciation!!!
Each aspect of mountains is exciting!!!
:-)))
Romek

Dan Dalton

Dan Dalton - Dec 17, 2007 5:30 pm - Voted 10/10

This is really well done...

and I love the geology! Very interesting for sure, great shots and well written. Would expect to see something like this in a regional geology guide.

Dan

Romuald Kosina

Romuald Kosina - Dec 19, 2007 2:11 pm - Hasn't voted

Re: This is really well done...

Hi, Dan!!!!!!!!
I appreciate very much your opinion!!!
I am going to prepare other such pages on geology of Polish mountains.
Many thanks!!!!!!
:-)))
Romek

yatsek

yatsek - Dec 15, 2008 6:03 pm - Voted 10/10

(G)neiss!

I mean nice:))

Romuald Kosina

Romuald Kosina - Jan 6, 2009 2:01 pm - Hasn't voted

Re: (G)neiss!

Jacek,
you are kind :-)
Thanks!!!
Romek

yatsek

yatsek - Jan 6, 2009 2:54 pm - Voted 10/10

Re: (G)neiss!

Happy New Year to you, Romek, including many happy returns to Mt Ślęża!
-Jacek

Viewing: 1-8 of 8