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Historical Geology 1

Historical Geology 103 LAB

QuestionAnswer
Present or future is key to past Uniformitarianism
Beds are layed down parrell to earth Original Horizontality
Oldest bed on bottom; youngest bed on top Superposition
Bowl like in valley until it cannot go anymore Lateral Continuity
Younger bed that cuts through older beds Cross-Cutting Relations
These are rounded to angular masses of solid material enclosed within a rock of recognizably different composition or texture Inclusion
3 Types of Unconformities Disconformity, Non-Conformity, Angular Conformity
Type of conformity between parallel Strata. Erosion. Disconformity
Type of conformity that sedimentary unit touches igenous and metamorphic units. Non-Conformity
Type of conformity thats not parrallel. Angular Conformity
Two types of folds Anticline (Dome), Syncline (Basin)
What are the three types of faults Thrust/Reverse, Normal, Strike-Slip
Type of fault that is convergent. Creates a force that is in Compression Thurst/Reverse
Type of fault that is Divergent. Creates a force that is in Tension. Normal
Type of fault that is transform. Creates a force that is in Shear. Strike-Slip
Calculating an age in years for geologic materials by measuring the presence of a short-life radioactive element. Radiometric Dating
Two or more associated formations Group
A distinctive and mappable rock unit Formation
Subdivisions of a formation (at least two must be present) Member
The smallest recognized rock-stratigraphic unit Bed
Geologic Time Units Eon, Era, Period, Epoch, Age
Time Rock Units System, Series, Stage
The locality where the formation is well exposed and first defined Type Locality
The landward change of the shoreline with time Transgression
If the sea level is lowered or the continental margin is raised, the shoreline will be forced away from the continent Regression
Each distinctive type of sediment Lithofacies
This stratigraphic concept of the succession of sedimentary facies Walther's Law
Created by: 07crf450x
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