rocks Flashcards
naturally occuring T or F
T
Composed of different materials T or F
T
what kind of forms
solid and semi solid
What is the formation of rocks
Generated
Transformed
Destroyed
what are the types of rocks
Igneous
Sedimentary
Metaphoric
What are igneous rocks
Formed when magma cools or solidifies
From the word “ignis”
Types of igneous rocks
Intrusive (plutonic)
extrusive (volcanic)
What is intrusive
EARTH’S CRUST
magma LOSES mobility and crystalizes UNDERGROUND
LARGE crystals
What is extrusive
Solidifies in EARTH’S SURFACE
has aphantic
VERY SMALL crystals
Fast cooling
What are the igneous rocks according to composition
FeLsic- Feldspar, silicon and LIGHT colored
Matic- Magnesium, iron and DARK colored
Examples of intrusive
Granite, Basalt, Pumice, Diorite
Examples of extrusive
Basalt,Andesite,Obsidian
what is Porphyritic texture
forms between intrusive and extrusive
Large crystals are surrounded by a fine groundmass
What are sedimentary rocks
From pre-existing rocks or once living organisms
What are the processes
Accumulation- Sediments build up over time
Lithification- Sediments harden into a sedimentary rock
what are clastic and detrial rocks?
Clastic- formed from pieces of pre- existing rocks
Detrial- rocks that form from transported solid material
What are the types of magma
Basaltic and Rhyolitic
What is in a basaltic rock
- low silica content
- high temperature
- low viscocity
- low gas content
What about rhyolitic
- high silica content
- low temperature
- high viscocity
-high gas content
Where is andestic in
Between Basaltic and rhyolitic
What are chemical sedimentary rocks?
- chemical precipitation of dissolved materials
- evaporation of bodies of water
- life processes of water dwelling animals
- chalk rock block, gypsum block, limestone
Where did metamorphic rocks come from?
parent rock
what do metamorphic rocks undergo?
changes in mineralogy, texture, chemical composition
types of metamorphic rocks
foliated and non foliated
