[DOC] [TLE] Geology Flashcards | Quizlet [PAR] Together, these elements give rise to hundreds of silicate minerals with a wide 
variety .... As one component in a rock, feldspar crystals can be identified by their 
... One group of feldspar minerals contains potassium ions in its structure and is ... 
The dark (or ferromagnesian) silicates are those minerals containing ions of iron
... [DOC] [TLE] Minerals [PAR] The combination of properties 4 and 5 give each mineral a unique set of physical 
properties ... The two most important mineral groups by abundance in rocks are 
the carbonates ... Because silicon atoms can share oxygen atoms, there are a 
variety of ways to build ... Ferromagnesian silicates contain iron and magnesium. [DOC] [TLE] Minerals, Rocks & Rock Forming Processes [PAR] Minerals can be classified into several groups according to their chemical 
composition. ... The elements from Oxygen to Magnesium make up 98.5% of the 
crust and are .... The name magma applies to silicate melts within the Earth's 
crust, when .... not give us lots of direct clues as to the source rock composition, 
we can gain... [DOC] [TLE] pyroxene | mineral | Britannica.com [PAR] Any of a group of important rock-forming silicate minerals of variable ... The name 
pyroxene is derived from the Greek pyro, meaning fire, and xenos, meaning ... 
In augite there can be extensive substitution of aluminum for tetrahedral silicon. ... 
In the low-calcium orthorhombic pyroxenes, M2 contains magnesium and iron,... [DOC] [TLE] amphibole | mineral | Britannica.com [PAR] Amphibole, any of a group of common rock-forming silicate minerals. ... from 
mafic igneous rocks (those containing dark-coloured ferromagnesian minerals) 
and ... The complex chemical composition of members of the amphibole group 
can be ... Amphiboles have hydroxyl groups in their structure and are considered 
to be... [DOC] [TLE] Mafic vs. Felsic - U. of Oregon [PAR] Mafic is used for silicate minerals, magmas, and rocks which are relatively high in 
the ... The term is derived from using the MA from magnesium and the FIC from 
the Latin ... It is important to note that there are many intermediate steps in the... [DOC] [TLE] Igneous Rock Composition - HyperPhysics [PAR] Igneous rocks are commonly classified by their composition and texture. ... of 
oxygen and silicon in the crust, igneous rocks are mostly made up of silicate 
minerals. These silicates can be generally divided into light and dark silicates. ... 
are also called ferromagnesian because of the presence of iron and magnesium 
in them. [DOC] [TLE] Classification of Igneous Rocks - UWGB Home [PAR] Nov 30, 2000 ... Most minerals can be written as combinations of the oxides. ... Or is there so little 
that silica deficient minerals like olivine, leucite or ... IUGS Igneous rock names ... 
Undersaturated rocks can contain alkali feldspar and plagioclase, but ... Rocks 
with 5-40 percent ferromagnesian minerals are termed diorite if... [DOC] [TLE] Amphibole - Wikipedia [PAR] Amphibole is the name of an important group of generally dark-colored, 
inosilicate minerals, forming prism or needlelike crystals, composed of double 
chain SiO 4 tetrahedra, linked at the vertices and generally containing ions of iron 
and/or magnesium in their structures. ... Amphiboles can be green, black, 
colorless, white, yellow, blue, or brown. [DOC] [TLE] Glossary of geology - Wikipedia [PAR] This page is a glossary of geology. Main article: Geology. Main category: 
Geology terminology ... Aggregate - A mass consisting of rock or mineral 
fragments. Albite - The ... Amber - name for fossil resin or tree sap that is 
appreciated for its colour. Amphibole ... Rocks containing amygdules can be 
described as amygdaloidal. [DOC] [TLE] Rock-Forming (Common) Minerals - Cseligman.com [PAR] Most of the common rock-forming minerals are combinations of the most 
abundant ... in the crust in terms of their overall mass and relative atomic 
abundance: ... silicon atoms, or calcium or magnesium in a one to two ratio -- are 
required. ... Similarly, rocks which contain a lot of ferromagnesian silicates are 
referred to as... [DOC] [TLE] Minerals of Igneous Rocks [PAR] 1  The Ferromagnesian Minerals. (Contain iron (

Question: Essential minerals can give rocks their names: ferromagnesian minerals contain this &/or magnesium
Answer: iron