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Book notes Interlude A

by: Henderson Notetaker

Book notes Interlude A GEO 101N - 02

Marketplace > University of Montana > GEO 101N - 02 > Book notes Interlude A
Henderson Notetaker
GPA 3.34

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These are the notes from the beginning of interlude A I have switched to book notes for the moment because I have a hard time following our substitute. When professor Sears comes back on Wednesday ...
Intro to Physical Geology
James W. Sears (P)
Class Notes
geology notes
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This 3 page Class Notes was uploaded by Henderson Notetaker on Sunday September 25, 2016. The Class Notes belongs to GEO 101N - 02 at University of Montana taught by James W. Sears (P) in Fall 2016. Since its upload, it has received 5 views.


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Date Created: 09/25/16
Introduction to Physical Geology (GEO 101N­02) Professor: Dr. Jim Sears Elite Notetaker: Cat Henderson Book Notes Interlude A ***Disclaimer: the following content is derived from notes I have taken from the required text or from my understanding of the  in class lecture. The notes and/study guides provided are to the best of my ability correct however they are NOT supervised by  the professor nor can I guarantee the absence of all mistakes.  Please understand that the following is my own notes (not my  original findings) from that of the sited material. These notes comply with the University of Montana Academic Dishonesty codes and policies and will not provide answers or cheat sheets for assignments or exams. Thank you for reading and understanding  this. *** Also for the next few uploads I will be taking my notes from the book as I have a hard time following our current substitute. I will return to lecture notes when professor sears is back on Wednesday What is rock? Reference: (pg103 sec A.2 Ess. Of Geo)  Rock – a coherent, naturally occurring solid consisting of an aggregate of minerals or,  less commonly of glass. o Coherent – a rock holds together, and therefore can be broken up o Naurally occurring – manufactured materials such as concrete or birck are not  found in nature so they are not rocks o Aggregate of minerals or glass – one or more minerals and some contain glass  What holds rock together:  o Bonding o Natural cement – clastic rocks o Interlock like jigsaw pieces – crystalline rocks  How does rock appear? o In broken chunks – bolders pebbles that have fallen o As bedrock – rock that is still attached to the earths crust  Outcrop – an exposure of bedrock: cliffs knobs in a field The basis of rock classification  Reference: (pg104 sec A.3 Ess. Of Geo)  Three basic groups o Igneous rocks  Form by the freezing (solidification) of molten rock o Sedimentary rocks  Form either by   the cementing together of fragments(grains) broken off pre­ existing rocks,   or by the precipitation of mineral crystals out of water solutions at  or near the earths surface o Metamorphic rocks  Form when pre­exsistring rocks change character in response to a change  in:  Pressure  Temperature  And/or Chemical environment  Occurs in a solid state (does not require melting)  Physical characteristics of individual rocks o Grain size and shape  The dimensions of indicidual grains  Grains – fragments or crystals  Can range in sizes  Some grains in rocks are equant   They have the same dimensions in all directions  Other grains are inequant   The dimensions are not the same in all directions o Composition  The proportions of chemicals that make up the rock o Texture  The arrangement of grains in a rock – the way grains connect to one  another  Wether or not inequant grains are aligned parallel to each other o Layering  Defined either by bands of different compositions or textures   Or by the alignment of inequant grains so that they trend parallel to each  other  Bedding the layering in sedimentary rocks  Morphic foliation the layering in metamorphic rock Studying Rock Reference: (pg107 sec A.2 Ess. Of Geo)  Rock – a coherent, naturally occurring solid consisting of an aggregate of minerals or,  less commonly of glass. Notes chapter 4 coming soon


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