Vocabulary
Texture that describes the presence of gas pockets
vesicular
Name one characteristic of igneous rocks
glassy, vesicular (gas pockets), crystals visible
small pieces of rock, can vary in size, includes sand, pebbles, cobbles, etc
sediments
Name a metamorphic rock
many answers- see reference table pg 7
A rock goes through the processes of melting and solidifying. What type of rock was formed?
Igneous
Meaning fragmental- a category of sedimentary rocks
clastic
Describe the texture of gabbro
coarse crystals
How are chemical / organic sedimentary rocks classified?
Composition
What are the two types of metamorphosism
regional and contact
A rock goes through compaction and cementation, then gets buried and is exposed to intense amounts of heat and pressure. What rock type is formed?
Metamorphic
Metamorphism caused by pressure from plate movement resulting in deformation
regional
This rock is known for its characteristic black color and glassy texture
obsidian
How are clastic sedimentary rocks classsifed?
grain size
Name a characteristic of metamorphic rocks
foliation, fused crystals, mica flakes ("fish scales"), etc
Name the processes needed to form sediments
Weathering and erosion
Alignment of minerals in a rock caused bvy heat and pressure
foliation
This rock is light in color and has gas pockets as a result of a quick cooling process
pumice
Name one characteristic of sedimentary rocks
visible sediments, sandy feel, layers, fossils, etc
Name the rock: foliated, lowest grade metamorphosis, very fine grained
Slate
Name a specific rock (not rock types) that could be created when sandstone is exposed to intense heat and pressure
Quartzite
Settling of materials due to evaporation of seawater
Precipitate
Name the rock: extrusive rock, mafic, dark in color, fine crystals
basalt
Name the rock:clastic, grain size between 0.0004 and 0.006cm
Siltstone
Name the rock: nonfoliated, forms from the metamorphosism of limestone
Marble
Describe the processes necessary to change gneiss into obsidian
melting and soldification