Igneous Rocks
What does it mean when an igneous rock is "intrusive"?
It was formed by magma, inside the earth's crust
Regional and contact
Which sedimentary rock can be easily split?
Shale
Which mineral is used in pencil lead?
Graphite
What does it mean when a rock is labelled as "vesicular"?
It has gas pockets
What is an example of a metamorphic rock that has "banding"?
Gneiss
What is the texture of gypsum?
Crystalline
Which mineral is also called "fool's gold" for its appearance that is close to gold?
Pyrite
If an igneous rock contains a lot of magnesium and iron, is it felsic or mafic?
Mafic
Nonfoliated
What is limestone composed of?
Calcite
What are the common colors of potassium feldspar?
White to pink
If the crystal size in a rock is from 1mm to 10mm, what is its texture?
Coarse
What metamorphic rocked is composed of quartz?
Quartzite
Is sandstone crystalline or clastic?
Clastic
Does pyrite have cleavage or fracture?
Fracture
Which igneous rock is classified as "very coarse"?
Pegmatite
What type of metamorphism is anthracite coal?
Regional
What type of fragments does breccia have?
Angular
Can selenite gypsum easily be scratched by a fingernail?
Yes