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Lab 4
Lab 4
21
Geology
Undergraduate 2
10/01/2013

Additional Geology Flashcards

 


 

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Term
Foliated
Definition
These rocks have their mineral crystals arranged in foliations, or sheet-like structures.
Term
Non-folaited
Definition
These rocks lack the layered structure of foliated rocks and instead have a more massive, crystalline appearance.
Term
Slaty
Definition
Foliated. Well-defined flat sheets with a very small grain size.
Term
Phyllitic
Definition
Folaited. Fine grained but have wavy foliation.
Term
Schistose
Definition
Foilated. Large grain size, glittery.
Term
Gneissic
Definition
Foliated. Alternating light and dark colored layers.
Term
Crystalline
Definition
Non-foliated. The rock contains medium-large crystals that are roughly equal in size and grow together in an interlocking mass.
Term
Microcrystalline
Definition
Non-foliated. Interlocked but much smaller grain size.
Term
Sandy
Definition
Non-foliated. Sand size mineral grains.
Term
Glassy
Definition
Non-foliated. Similar to the igneous glassy texture.
Term
Attitude
Definition
The orientation of a rock unit.
Term
Strike
Definition
The compass bearing of a line formed by the intersection of a horizontal plane.
Term
Dip
Definition
The angle between a horizontal plane and the inclined stratum, fault, or fracture.
Term
Disconformity
Definition
an unconformity between relatively parallel strata
Term
angular unconformity
Definition
an unconformity between nonparallel strata
Term
nonconformity
Definition
an unconformity between sedimentary rock/ sediment and subjacent non sedimentary rock.
Term
Syncline
Definition
downfold or concave
Term
anticline
Definition
upfolds or convex
Term
homocline
Definition
all of the formations dip in one same direction
Term
Domes
Definition
large, somewhat circular, warped upwards
Term
basins
Definition
large, somewhat circular, downward.
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