Rocks

Geology 115 with Pedersen at University of Wisconsin - Eau Claire

About this deck

By: Kelly McCarthy
Textbook: Montgomery:Environmental Geology w/OLC Bind In Card
Created: 2009-02-24
Size: 21 flashcards
Views: 11

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What are the 3 broad rock categories?

Igneous, Sedimentary and Metamorphic

How is an Igneous Rock formed?

formed by solidification and crystallization of a cooling magma

Texture of igneous rocks is primarily controlled by _____________.

Cooling rate

Igneous rock names are based on _____________ and mineralogic composition.

texture

________ rocks contain abundant dark-colored ferromagnesian minerals

Mafic

__________ rocks contain roughly equal amounts of dark- and light-colored minerals

Intermediate

_________ rocks contain abundant light-colored minerals

Felsic

Rounding of particles occurs due to ___________ during transport

abraision (wind and water), not ice!

________ occurs as sediment is separated according to grain size by transport agents

Sorting

This is the most common sedimentary rock type. Formed from cemented sediment grains that come from pre-existing rocks

Clastic sedimentary rocks

What are the three types of Clastic sedimentary rocks?

Shale, Sandstone, and Breccia & Conglomerate

What is the difference between Breccia and Conglomerate?

Breccia= angular rock
Conglomerate= rounded gravel
(only difference is shape)

Sandstone is ______-grained

medium

What clastic sedimentary rock is fine-grained and splits into thin layers

Shale

What type of Sedimentary Rocks has crystalline textures and formed by precipitation of minerals from solution?

Chemical Sedimentary Rocks

What are the 2 types of Chemical Sedimentary Rocks?

Carbonate and Evaporites

Carbonates contain ______ as part of their chemical composition

CO3

How do Evaporites form?

form from evaporating saline waters

What type of Sedimentary Rocks form from remains of organisms?

Organic Sedimentary Rocks

Rocks produced from pre-existing or parent rocks

Metamorphic rocks

Texture and mineral content of metamorphic rocks depend on:

Parent rock composition, Temperature and pressure during metamorphism, effects of tectonic forces and effects of fluids (water)

About this deck

By: Kelly McCarthy
Textbook: Montgomery:Environmental Geology w/OLC Bind In Card
Created: 2009-02-24
Size: 21 flashcards
Views: 11

About StudyBlue

“I have used this website for three exams, and I see a huge difference in my test results.”
Naj