Lab Exam 1 Flashcards
Sedimentary Rocks
- Grey chert or flint
- Yellow sandstone
- Red sandstone
- Limestone
- Grey shale
Igneous Rocks
- Granite
- Diorite
- Basalt
Metamorphic Rocks
- Marble
- Schist
- Gneiss
- Slate
Chert or Flint is composed of what mineral?
Quartz
Sandstone is composed of what mineral?
Quartz
Limestone is composed of what mineral?
Calcite
Shale is composed of what mineral?
Kaolinite
Sedimentary rocks are most composed of what types of colors?
Bright and colorful. Can also be colorless due to them being impure.
Granite contains a black accessory mineral and which one of the feldspar minerals?
Orthocalse
Diorite contains a black accessory mineral and which feldspar mineral?
Albite
Basalt contains which feldspar mineral?
Anorthite
What accessory minerals are most commonly encountered in igneous rocks?
Biotite and Hornblende
Black specs seen on rocks are not feldspar, but what kind of rocks?
Granite and Diorite
Give and example of a medium grade metamorphic rock.
Schist
What is the parent rock to marble and what rocks forms it?
Calcite is the parent rock and limestone is what makes up marble.
Marble is what type of texture?
Non- Foliated texture
What is the parent rock to Gneiss?
Granite
What is the parent rock to Slate?
Shale
Intrusive vs. Extrusive rocks
Intrustive rocks are UNDER the ground that cool very slowly. Extrusive rocks cool ABOVE the ground and cool very quickly.
A texture that is very porous and is the result in gas bubbles being trapped in the cooling of lava.
Vesicular
These rocks crystallize at the highest temperature and do not have any feldspars present.
Ultramafic
These rocks contain the calcium feldspars such as anorthite and labradorite.
Mafic (Basalitic)
Albite, the light colored sodium feldspar, is the dominant feldspar in this category.
Intermediate (Andesitic)
The potassium feldspar, orthocalse, is the dominant feldspar in this igneous rock type.
Felsic (Granitic)
Igneous rocks with visible grains
Granite
Diortite
Grabbo
Perdotite
Igneous rocks with non- visible grains
Rhyolite Basalt Obsidian Scoria Pumice
