[DOC] [TLE] Rock Types - Sandatlas [PAR] List of all Igneous, Sedimentary, and Metamorphic Rock Types with Pictures and 
Links to ... Even rocks within one rock type may have a highly variable 
composition. ... gabbro, andesite, pegmatite, basalt, pumice, porphyry, obsidian, 
granite, and tuff. .... Syenite is a plutonic rock that contains little or no quartz and 
in which... [DOC] [TLE] Rock Key [PAR] Basalt, Diabase, Diorite, Gabbro, Granite, Obsidian, Pumice, Rhyolite, Scoria ... 
Igneous Rock is formed when a magma cools underground and crystallizes or 
when it .... Grains: Grains that are not crystals in rock do not have flat shiny faces. 
... In schists, the layers are most often thin layers of mica or chlorite around lens... [DOC] [TLE] Rocks and Minerals [PAR] Question #3: One of the following mineral properties can be determined by ... 
Question #5: An igneous rock that formed by rapid cooling will probably have ... (
B). obsidian ... Question #9: Which of the following does not belong with the 
others? ... #12: Heat and pressure can change slate to the metamorphic rock 
schist. [DOC] [TLE] Igneous Rocks [PAR] Molecules in the lava do not have time to arrange themselves to form large 
crystals. ... A common example of an extrusive igneous rock is basalt. Some 
extrusive rocks, such as obsidian and pumice, cool so rapidly that they ... Silica is 
one of the most abundant elements on Earth and is the chief component of quartz
. Felsic... [DOC] [TLE] The types of rock: igneous, metarmorphic and sedimentary [PAR] Jan 12, 2015 ... Some volcanic rocks (like obsidian) don't have any crystals at all. Basalt  note 
the almost complete lack of visible crystals. ... Not all magma is made equal 
though  different magmas can have different chemical ... Among these, the most 
usual ones are: garnet, chlorite and kyanite. ... An old, red sandstone. [DOC] [TLE] The Rock Gallery has Igneous Metamorphic Sedimentary Rock ... [PAR] The igneous rocks are listed at the top of the page followed by metamorphic and 
... Because of basalt's low silica content, it has a low viscosity (resistance to flow). 
... It is one of the most common rock types associated with enormous ... Obsidian 
is formed when the lava cools so quickly that crystals do not have time to grow. [DOC] [TLE] Chapter 4 Rocks and Minerals - Volcano World [PAR] The lava has cooled and is now a volcanic rock called basalt. .... Minerals that do 
not grow in these regular or crystalline patterns are called Amorphous solids. ... 
Quartz is a mineral made from one substance SiO2 (Silicon Oxide) that has a .... 
The obsidian on the far right is a good example of a rock that has conchodial... [DOC] [TLE] Analyzing How Different Types of Rocks are Formed [PAR] Interpreting the characteristics of the three types of rocks. ... The distinct 
characteristics that separate igneous, sedimentary, and metamorphic rocks are 
not easily observed. ... IGNEOUS ROCKS (obsidian, granite, scoria, basalt) - all 
samples seem to be hard ... SCHIST: Schist is composed of visible minerals, 
mostly micas. [DOC] [TLE] PDF of the rock descriptions document. - New Mexico Institute of ... [PAR] Most rocks are a collection of one or more minerals (see below), but some 
contain ... Igneous rocks that are exposed at the surface undergo weathering 
from atmospheric ... Rhyolite is an igneous rock with a relatively silica-rich (like 
granite or obsidian) composition. .... Schist that is derived from basalt is used to 
make talc, a. [DOC] [TLE] Igneous Rocks - Mineral Gallery [PAR] Igneous rocks are one of the three major rock types and are basically rocks that ... 
But there are also rocks that form from magma that does not reach the surface... [DOC] [TLE] Rocks under the Microscope - Index - Department of Earth Sciences [PAR] The images are classified according to rock type (sedimentary, igneous, 
metamorphic). ... This sandstone is made of quite well rounded grains of quartz, 
cemented together by ... Gabbro

Question: Of basalt, schist & obsidian, the one not an igneous rock
Answer: schist