Igneous Rocks
How does obsidian usually appear?
Black
which sedimentary rock has rounded fragments and is inorganic/land derived
Conglomerate
Which metamorphic rock is Coarse and non foliated and composed of various minerals?
Metaconglomerate
DO more minerals Cleave or fracture?
Cleave
What is the texture of granite?
Coarse
What are the categories the identification scheme is split in to
Inorganic land derived sedimentary rocks and chemically and/or organically formed sedimentary rocks
True or False Phyllite is composed of 2 minerals
False there are 5 it is composed of
What colorless/variable mineral fractures?
Quartz
What Igneous rock does not have any amphibole in it?
Perodotie
What sedimentary rock is microscopic to very coarse and bioclastic?
Carbon
What texture of metaphorphic rocks have the same type of metamorphisim?
Foliated(banding,mineral alighnment)
What is the composition of Hematite
Fe2O3
How is an Igneous rock formed?
From the solidification of magma
WHat is rock gypsums texture and grain size
crystalline and fine to ciarse crystals
What is the grain size, texture and metamorphasis type of Hornfels
Contact(heat) , various minerals , Fine
How many minerals compositions contains Magnesium(Mg)
6
Can a glassy textured igneous rock be non-vesicular?
No
WHat are the texture categories?
Clastic/fragmental, crystalline, crystaline or bioclastic , bioclastic
Name the texxture , composition and type of metamorpism of Gneiss
Foliated banding , nedium to coarse , mica quartz feldspar amphibole gernet pyroxene , Regional.
How many minerals cleave in multiple directions?
4