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Geology 100, Week 2 notes

by: Sarah Martin

Geology 100, Week 2 notes Geology 100

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Sarah Martin

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these cover chapter 2 and contain the study questions with answers
Geology 100
Sabreen Ata Gad
Class Notes
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This 3 page Class Notes was uploaded by Sarah Martin on Friday September 2, 2016. The Class Notes belongs to Geology 100 at Kansas State University taught by Sabreen Ata Gad in Fall 2016. Since its upload, it has received 13 views. For similar materials see Geology 100 in Geology at Kansas State University.


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Date Created: 09/02/16
8/31 Chapter 2: Study questions: 1) What was the main mystery described for the Mediterranean Sea? c. The Mediterranean dried up and deposited layers of salt. 2) Beneath the Mediterranean Sea, large deposits of salt and layers of wind- deposited sand dating from around 6 million years ago are present. Which os the following would you conclude based on this information? a. The Mediterranean Sea once evaporated, leaving behind large salt deposits and creating a desert-like environment of wind-blown sands. 3) The vertical black lines indicated in rock untis #3 and #4 indicate what type of feature? a. fractures 4) The sediment in this photograph most likely formed in... a. a steep mountain front 5) The rock in this photograph most likely formed in... b. a river 6) What is the youngest unit or feature in this figure? e. 5 (is invading the entire sequence) 7) The oldest unit or feature in this photograph is... c. the tilted rocks at the bottom (cause its at the bottom and fragments) 8) Which of the following is a principle to interpret relative ages? c. A younger rock can include pieces of an older rock 9) What type of figure would you use to portray the relative thickness of rock units stacked on top of one another? d. stratigraphic section 10) This figure shows three blocks in water. Which of these materials is the least dense? a. block 1 youngest layer is on top; old rocks are always on the base younger features can crosscut (shift downward/upward - potentially can form a cliff) older rocks or features younger units can contain an older rock unit young magma can bake older rocks tan rocks vs black rocks : darker colored are older because its underneath the tan and broken fragments of black rocks are in the tan rocks (also the tan looks like it is "invading" the black rocks) types of maps: shaded-relief (different kinds of light used); topographic (elevation/ black and white); satellite image; geologic map (types of rocks and features/ ages) DEPTH: beneath sea level ELEVATION: height above sea level RELIEF: elevation difference STEEPNESS: angle of slope block diagram (3D) - cross section (2D) - stratigraphic section (idealized sequence of layers) qualitative data: description (words or sketches) quantitative data: numeric measurements(numbers) ex: gas composition(volcanoes), water flow and chemistry, age of rock, chemical composition, physical properties(earthquakes) density = mass/volume weight = downward force object exerts under gravity (controlled by mass and gravity field strength) 9/2 4 main parts of geologic time scale(fossil based) : precambrian(4,500ma)-before shells and hard parts, paleozoic(542ma)-appearance of fish, plants, insects, reptiles, etc., mesozoic(251ma)-dinos and first flowering plants, cenozoic(65am)-most recent(lots of mammals) *know eras, not periods data vs interpretations (yellowstone): north american continental plate is moving over a hot spot stuff going on neat yellowstone lake: rising area(observed in 1920) and as it rose on one side, then trees flooded on the other side ex: observation: gas in ground water questions: from leak in buried tank? proposed explanation: if tank is cause then there is leak collect data to test predictions: no leak in tank, wrong kind of gas in tank conclusion: contamination leak is from somewhere else the corner of brazil matches the corner in africa - continents fit together because they might have once been joined - continental drift how could a crater form? layers are flat lying away from the crater but disrupted by the crater; layers have been bent outward so they're tilted - volcanic explosion, rising salt (it rises up and is blown away), meteoroid impact minerals formed at high pressure crater with a circular feature (related to salt, magma, meteroids); layers bent upward


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