Question | Answer |
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 |