[DOC] [TLE] General Questions #10 Jeopardy Review Game Answer Key [PAR] ... attraction between atoms may be ionic, covalent or hydrogen, Bond. #5, This 
dark volcanic rock is low in silica content but fairly rich in iron and magnesium... [DOC] [TLE] Rock Key [PAR] [ Return to Rock Key Table of Contents ] ... Igneous Rock is formed when a 
magma cools underground and crystallizes ... The color is medium to dark green, 
sometimes almost black but with a ..... The grain size is usually fairly coarse. .... It 
is formed from a magma that is rich in iron and magnesium, and poor in silica (
quartz). [DOC] [TLE] The Quartz Page: Quartz as a Rock-Forming Mineral [PAR] Oct 3, 2014 ... When one talks about the Earth's crust as a whole, volcanic rocks are ... These 
rocks have a very low quartz content or are void of it. ... Quartz is one form of 
silica, SiO2, but the terms "quartz content" and "silica ..... The term mafic originally 
referred to minerals rich in magnesium and iron (ferrum in Latin). [DOC] [TLE] basalt | rock | Britannica.com [PAR] Extrusive igneous (volcanic) rock that is low in silica content, dark in colour, and 
comparatively rich in iron and magnesium. ... to the alkali group; nepheline, 
analcime, and leucite are the commonest, but haynite is occasionally present. ... 
They are fairly common in some parts of Germany and also occur in the United 
States... [DOC] [TLE] Volcanoes [PAR] Volatile content refers to gases dissolved in the lava, like carbon dioxide in soft ... 
volcanoes are fairly quiescent, intermediate/andesitic volcanic eruptions are ... 
So, mafic lavas are hot , low in silica and volatiles, and have relatively low 
viscosity. ... minerals like olivine which are rich in iron and magnesium and poor 
in silica. [DOC] [TLE] Hawai'i Volcanoes and Haleakala National Parks (Volcanoes of the ... [PAR] The "molten" rock is in reality not a simple melt, but a complex mutual solution of 
... lavas are near the silica-poor end of the scale, and are relatively rich in iron, ... 
Loose crystals of olivine are fairly abundant in the ash of the explosions of 1924 
... of Hawaiian lavas and in their lower gas content, which appears generally to 
be... [DOC] [TLE] Minerals, Rocks & Rock Forming Processes [PAR] A) during the cooling of molten materials (steel, from lavas, igneous rocks). .... 
They are rich in iron and magnesium and form through partial melting of the ... 
Because of their lower temperature and high silica content granitic magmas tend 
to ... at low temperatures), and therefore the mineral composition of an igneous 
rock... [DOC] [TLE] Geology Word of the Week: K is for Komatiite - Georneys - AGU ... [PAR] Jan 15, 2011 ... An ultramafic rock is a rock that has very low silicon (SiO2), sodium (NaO), and 
potassium (K2O) and very high and iron (FeO) and magnesium (MgO) content, 
generally ... A mafic rock is basically a dense, dark-colored rock that is more ... 
Komatiites are fairly rare rocks, but they are found throughout the... [DOC] [TLE] Composition of Mars - Wikipedia [PAR] The composition of Mars covers the branch of the geology of Mars that describes 
the make-up .... These minerals are the primary constituents of basalt, a dark 
volcanic rock ... The mineral olivine occurs all over the planet, but some of the 
largest .... the Mars Exploration Rover Spirit identified outcrops rich in magnesium
-iron... [DOC] [TLE] BOWEN'S REACTION SERIES [PAR] Norman L. Bowen experimented with laboratory melts of igneous rocks in the ... 
Mafic - a mineral containing iron and magnesium .... On both sides of the reaction 
series, the silica content of the minerals ... and magnesium, and low silica. ... The 
muscovite and potassium will readily break down, but the quartz is fairly resistant
... [DOC] [TLE] ROCKS AND THEIR USES - Kentucky Coal Education [PAR] Introduce students to different types of rocks and their uses. ... specific conditions, 
resulting in

Question: This dark volcanic rock is low in silica content but fairly rich in iron & magnesium
Answer: basalt