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Geology 2.0

Geology Lab Midterm

QuestionAnswer
MINERAL DEFINITIONS It must be solid
it must be naturaly occuring it must have an orderly interal arrangement of atoms.
it must have a definite chistal stucture it must not be a physically separable mixture
it must have physical properties PROPERTIES OF MINERALS :LUSTER
Metalic looks like metal
SubMetalic looks like dull or coroded metal
Non-Metalic doesn't look like metal
STREAK HARDNESS
CLEAVAGE Breaks along planes
FRACTURE Breaks in irregular paterns
TEXTURES OF IGNEOUS ___
Phaneric rock is composed of grains visable to the unaided eye
Aphanitic rock with very fine grained minerals or one composed of mineral grains too small to be distinguished with the unaided eye.
Porphyritic rock has two distinctly different grain sizes.
Glassy no grains; rock is smooth
Vesicular rock contains gas holes
Pyroclastic ( fragmental) rock is made of separate fragments of glass, minerals and/or rocks
Igneous Composition Classes ___
Felsic contains quartz and potasium
Intermediate Light colored
Mafic Dark or Black
Ultramafic Green to Black
SEDIMENTARY ROCKS/MINERALS _____
Textures of Sedimentary Rocks _____
Clastic Texture broken fragments of minerals, rocks, or organic remains
Interlocking Texture Looks like a rock puzzle; made of interlocking grains with out cement
Microscopic Texture Grains to small to be seen by the unaided eye.
METAMORPHIC MINERALS/ROCKS ______
Textures of Metamorfic Rocks ______
Foliated Parallel orentation of sheet-like rocks
Non-Foliated Random orentation of equal sized grains
Created by: mr.vonlipich
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