CH 6 Rocks & Rock Cycle Quiz Review
Plagioclase feldspar, biotite, pyroxene, amphibole, and olivine are common minerals in felsic/mafic igneous rocks.
mafic
Rocks are composed of _____________.
More than one mineral
___________ is intrusive, coarse-grained, and felsic, while ______________ is extrusive, fine-grained, and mafic. Basalt Shale Granite Marble
Granite, Basalt
In the rock cycle, rocks are classified by ___________.
How they form
A non-foliated metamorphic rock formed from quartz sandstone is __________.
quartzite
Felsic/mafic rocks are high in iron and magnesium.
mafic
Shale is a(n) ______________ rock.
Sedimentary
Stratification, fossils, ripple marks, mud cracks, nodules, concretions, and geodes are found in _________________ rocks.
sedimentary
Which of the following pairs includes a metamorphic rock & its parent rock? – Slate & obsidian – Granite & limestone – Gneiss & marble – Slate & shale
Slate & shale
A ___________ any rock mass that forms when magma pushes into fractures (cracks) in the bedrock
pluton
Bioclastic rocks form from ________________.
The remains of plants or animals
A rock that is light in color and low in density would be felsic/mafic.
Felsic
Shells are often found in which rock?
Limestone (coquina)
An porphyry is an igneous rock that has _________ very different crystal sizes (textures). – Ex. Large crystals in a fine groundmass
two
Intrusive igneous rocks have ____________ texture & extrusive igneous rocks have ____________ texture.
Intrusive –coarse or very coarse, non-vesicular Extrusive—glassy or fine, vesicular or non- vesicular
A felsic rock that has holes and fine-grained crystals is _____________.
Vesicular rhyolite
Gabbro is a(n) _________ rock
igneous
The grain size for sand is ________.
0.006 to 0.2 cm
Felsic/mafic rocks are high in aluminum.
felsic
____________ shows platy mica crystal visible from metamorphism of clay or feldspars.
schist
Potassium feldspar, quartz, plagioclase feldspar, biotite, and amphibole are common minerals in felsic/mafic igneous rocks.
felsic
Which igneous rock is intrusive and have a very coarse, non-vesicular texture?
pegmatite
Foliated metamorphic rocks can show __________ or ____________ textures.
Mineral alignment or banded
Minerals precipitating out of water or being left behind when water evaporates form __________________ sedimentary rocks.
chemical
What is the main difference between conglomerate and breccia?
Conglomerate– rounded particles Breccia—angular particles
Marble is a(n) _____________ rock.
Metamorphic
The composition of rock salt is _________.
halite
Mafic rocks have _________ density and are ________ in color.
High density, dark color
Coal’s composition is ___________.
carbon
Dikes, sills, laccoliths, volcanic necks, and batholiths are examples of _______________.
plutons
The weathering, erosion, and deposition of rock fragments such as sand forms _____________ sedimentary rocks.
clastic
When sediments are deposited, what size sediment (large or small) would be closest to the beach & what size would be further out in the ocean?
Beach – large Ocean – small