Igneous Rocks
What type of rock forms from cooled magma or lava?
Igneous rock
Sedimentary rocks are formed from layers of what?
Sediments
What two things cause rocks to metamorphose?
Heat and pressure
According to the ESRT, what sedimentary rock is made of rounded pebbles?
Conglomerate
I’m a sedimentary rock made of tiny clay particles, and I split easily into flat sheets. What am I?
Shale
What texture forms when lava cools quickly at Earth’s surface?
Fine-grained or glassy
What are the two main processes that turn sediments into sedimentary rock?
Compaction and cementation
Which metamorphic rock forms from limestone?
Marble
According to the ESRT, what igneous rock is mafic, fine-grained, and extrusive?
Basalt
I’m a non-foliated metamorphic rock that forms from limestone and can be polished into statues. What am I?
Marble
Name an intrusive igneous rock that is felsic and coarse-grained.
Granite
Which sedimentary rock bubbles (effervesces) with acid?
Limestone
Which metamorphic rock shows light and dark mineral bands?
Gneiss
Using the ESRT, what metamorphic rock forms from shale after regional metamorphism?
Slate
I’m an igneous rock that’s glassy and dark, formed when lava cools so fast no crystals form. What am I?
Obsidian
What does a vesicular texture tell you about an igneous rock?
Gas bubbles were trapped while cooling
Which clastic sedimentary rock is made of clay particles?
Shale
What type of metamorphism occurs when rocks are changed by heat from being close to nearby magma?
Regional metamorphism
According to the ESRT, what sedimentary rock is composed of halite?
Rock salt
I’m a metamorphic rock with light and dark bands of minerals. What am I?
Gneiss
Which igneous rock has a glassy texture and is extrusive and felsic?
Obsidian
Which sedimentary rock can be either crystalline or bioclastic and contains calcite?
Limestone
What type of metamorphism occurs when rocks are changed by heat from touching nearby magma?
Contact metamorphism
According to the ESRT, what igneous rock has more than 10% olivine and is coarse-grained?
Peridotite
I’m a sedimentary rock with rounded pebbles cemented together. What am I?
Conglomerate