Classifying Rocks
The grain size and the way grains fit together
Texture
Igneous rock formed from lava on Earth's surface
Extrusive
The process that presses sediment together
Contains parallel layers of flat, elongated minerals
Foliated
The process in which water or wind loosen and carry away rock fragments
Erosion
The fragments that make up a rock
Grains
Igneous rock formed from magma below Earth's surface
Intrusive
What are the three groups of sedimentary rocks?
Clastic, chemical and biochemical
Metamorphic rocks that have mineral grains with a random, interlocking texture
Nonfoliated
Broken piece or fragment of rock
Clast
What are the three major groups of rocks
Metamorphic, igneous and sedimentary
Name an igneous rock that has a glassy texture
Type of sedimentary rock formed when rock fragments are squeezed together
Clastic rock
The permanent change in shape by bending and folding
Plastic deformation
Rock
Give three characteristics geologists look for when observing a rock sample
Color, texture and mineral composition
A mineral formed from oxygen and silicon
Silica
Type of sedimentary rock formed by organisms or contains the remains of organisms
Biochemical (organic)
The formation of metamorphic rock bodies that are hundreds of square kilometers in size
Sediment or rock added to a landform
Deposit
What is the series of processes that change one type of rock into another type of rock
Rock cycle
How do igneous rocks form?
Type of sedimentary rock that forms when minerals crystalize directly from water
Chemical
Any process that affects the structure or composition of a rock in a solid state as a result of changes in pressure, or the addition of chemical fluids
Metamorphism
The process in which dissolved minerals crystallize and glue particles of sediment together