Topic:

Porphyritic Texture

Not finding your answer? Try searching the web for Porphyritic Texture
Answers to Common Questions
its where you can see grains but then again cant
http://wiki.answers.com/Q/What_is_porphyritic_texture   See entire page »
Porphyritic texture is a feature of some igneous rocks, not sedimentary rocks.
http://wiki.answers.com/Q/Is_porphyritic_texture_is_no...   See entire page »
Porphyritic texture is Containing large isolated crystals in a mass of fine texture.
http://www.chacha.com/question/what-is-porphyritic-tex...   See entire page »
Answers to Other Common Questions
You cannot determine the age of a "texture". There are numerous methods for dating the age of rocks. Go to Geology.com and search for rock dating methods.
http://wiki.answers.com/Q/How_do_you_determine_the_age_...
Various. A porphyritic texture is defined by as having two distinct grain sizes, typically aphanitic and phaneritic. By having both textures, the igneous rock is said to have cooled at two different rates, usually cools slowly (allowing for...
http://answers.yahoo.com/question/index?qid=20090921101...
A porphyritic texture can tell one of two stories. The first one is that some cooling took place before the igneous rock erupted as a lava onto the surface of the Earth. The second one is that the cooled magma almost reached the surface of ...
http://answers.yahoo.com/question/index?qid=20090907153...
Porphoritic means the igneous rock is made of crystals of varying size> some crystals will be large, while others will be small. Phaneritic means that all the crystals in the igneous rock are large enough to be seen with the naked eye
http://answers.yahoo.com/question/index?qid=20091205103...