2006-10-23 12:43:59 · 4 answers · asked by bianca v 1 in Science & Mathematics ➔ Earth Sciences & Geology
Classification of Igneous rocks:
1. Texture: whether the rock is glassy, vesicular, pegmatitic, aphanitic, phaneritic, etc, etc (forgot the other types of texture).
2. Minerals composition: find out what types of minerals are in the rock.
3. If you want to know what type of Igneous rock is it, use the Igneous Rocks Classification Chart.
http://jersey.uoregon.edu/~mstrick/AskGeoMan/IgRxChart.html
Good luck on this ****...classifying rocks is the most retarded thing (as least for me).
2006-10-23 14:29:51 · answer #1 · answered by c00kies 5 · 0⤊ 0⤋
You identify an igneous rock by its texture and mineral composition.
2006-10-23 20:27:30 · answer #2 · answered by dawn 2 · 0⤊ 0⤋
Grain size, color, mineralogy, texture. Depending on the answers to the preceding criteria I arrive at a reasonable answer. I always have an idea of where this rock fits (or if it doesn't fit) on Bowen's Reaction Series.
2006-10-24 13:01:37 · answer #3 · answered by Amphibolite 7 · 0⤊ 0⤋
igneous rock is rock that was formmed from lava.
Stroudios whaterver ro ck is formed bye layers.
I don't know the other one.
2006-10-23 19:46:47 · answer #4 · answered by outrun_7 3 · 0⤊ 0⤋