Photos
Help

Porphyr / Porphyry

0

Description

https://de.wikipedia.org/wiki/Porphyr

https://en.wikipedia.org/wiki/Porphyry_(geology)

Porphyry is a textural term for an igneous rock consisting of large-grained crystals dispersed in a fine-grained matrix. The adjective porphyritic refers to a certain texture of igneous rock regardless of its chemical and mineralogical composition.

However, especially in Germany most rocks called "Porphyry" are igneous volcanics and pyroclastics, rather than igneous plutonics.

Correct tags for those rocks depending on the mineralogical composition or pyroclastic origin might be: Rhyolite, Andesite, Trachyte or the pyroclastic Ignimbrite (Note: Not each of those rocks are Porphyrys. Only the porphyritic ones - You might add 'porphyritic' within the description.)

Igneous: A porphyritic granite or porphyric diorite e.g. just is tagged as granite respectively diorite.

This area doesn't have any sub-areas or routes yet!

If you are familiar with Porphyr / Porphyry please take the time to add what you know. Thanks!

If you login then you can add areas and/or routes.

Hello!

First time here?

theCrag.com is a free guide for rock climbing areas all over the world, collaboratively edited by keen rock climbers, boulderers and other nice folks.

You can log all your routes, connect and chat with other climbers and much more...

» go exploring, » learn more or » ask us a question

Share this

Activity

Check out what is happening in Porphyr / Porphyry.

Deutsch English Español Français Italiano 한국어 Português 中文