Minerals
Which mineral has a hardness of 6 and cleaves in 2 directions, and is also used in making ceramics?
Plagioclase Feldspar
Provide 2 words that describe the texture of pumice.
Glassy, Non-crystalline, Vesicular
How do sedimentary rocks form?
Weathering, erosion, burial, deposition, compaction, cementation
How are metamorphic rocks formed?
Heat and pressure
What is the composition of the rock limestone?
Calcite
What determines the hardness or crystal shape of a mineral?
Internal arrangement of the atoms
Which colored rock is more dense?
Dark
What is the grain size range for the rock sandstone?
.006 - .2 cm
Give and example of a nonfoliated metamorphic rock formed by contact metamorphism.
Hornfels
Name a rock that will bubble with acid.
Limestone, Marble
Garnet
Name 2 minerals found in diorite
Plagioclase Feldspar, Biotite
What element do bioclastic sedimentary rocks contain?
Carbon
Metmorphism of limestone creates this new rock __________________
Marble
Name 2 rocks that contain the mineral quartz.
Granite, Pumice, Gneiss, etc.
Name a mineral will be scratched by Pyroxene, but can't be scratched by Calcite.
Dolomite or Flourite
Provide two differences between the rocks gabbro and rhyloite.
Environment of formation, crystal size, texture, etc.
What's the difference of the rock fragments in breccia and conglomerate?
Breccia - angular
Conglomerate - rounded
The rock sandstone turns into this type of metamorphic rock because of these two processes.
Quartzite, because of heat and pressure
What is the chemical composition of a mineral with fracture?
Answers vary.
Name 2 minerals with a mafic composition, and 2 minerals with a felsic composition.
Mafic: Pyroxene, Olivine
Felsic: Potassium Feldspar, Quartz
Would you be able to find fossils in an igneous rock? Why not?
No, burned up/melted
Clastic - rock pieces cement together
Crystalline - evaporation of water
What type of metamorphism produces a more dense metamorphic rock? Why?
Regional - produces with high pressure under mountains.
Name 5 minerals in the rock basaltic glass.
Plagioclase Feldspar, Pyroxene, Biotite, Olivine, Amphibole.