BIO211H5 Lecture Notes - Chloroplast, Gowganda, Lightning

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viridiancockroach622

30 Apr 2012

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The precambrian originally designated as time before oldest known rocks (at the time, 3. 8 billion years ago), but now older rocks are known and included in the hadean. Precambrian craton formation of large cratons and earliest modern-style orogeny wopmay orogen: 2 billion years ago. Gowganda glacial deposits: ~2. 3 ga old craton: large non-deformed portions of very old continents, usually of precambrian age. Canadian shield: precambrian craton exporsed at surface high heat flow produced small, thinner continents continental accretion deep water sediments accreted to continent. Greenstone belts o: marine sediments form wedge between continental masses, weakly metamorphosed from igneous mafic and sedimentary rocks o o nested within high-grade felsic metamorphoc rocks abundant chlorite. Chert interbedded with sediments rich in iron formed in low o2 marine environments stopped forming 1. 9 ga (billion years) ago. Early life filamentous bacteria present ~3. 5 billion years ago stromatolites: structures built by cyanobacteria; 3. 5 billion years ago-present biomarkers for eukaryotic cells o steranes 2. 7 billion years old.

Related Questions

1.) Oceans cover approximately _____ % of the earth'ssurface.
a. [20] b. [50] c. [70] d. [85]

2.) What type of rock is the ocean floor made ofprimarily?
a. [Granite] b. [Schist] c. [Marble] d. [Basalt]

3.) What description below best explains the continentalshelf?
a. [The geological edge of the continent and is where the continentdrops off to the deep ocean floor]
b. [A wedge of sediment that sits at the base of the continent onthe ocean floor]
c. [The flat and mostly submerged part of the continent]

4.) What description below best explains the continentalslope?
a. [The geological edge of the continent and is where the continentdrops off to the deep ocean floor]
b. [A wedge of sediment that sits at the base of the continent onthe ocean floor]
c. [The flat and mostly submerged part of the continent]

5.) What description below best explains the continentalrise?
a. [The geological edge of the continent and is where the continentdrops off to the deep ocean floor]
b. [A wedge of sediment that sits at the base of the continent onthe ocean floor]
c. [The flat and mostly submerged part of the continent]

6.) Where does the sediment that makes up the continental risecome from?
a. [Continents via Rivers] b. [From the Ocean Floor] c. [Volcanoes]d. [Hawaii]

7.) Which of the choices below is the term that is used to referto a remarkably flat, deep and fine sediment-covered ocean floorthat sits between the foot of a continental rise and a mid-oceanridge?
a. [Continental shelf]
b. [Guyot]
c. [Abyssal plain]
d. [Continental slope]

8.) When magma comes up to the surface along the mid-oceanridges of the world, it displaces the newly created rock above itto either side of the ridge. As this process continues over time,what age pattern does the ocean floor eventually exhibit?
a. [Rock will be older as you move away from the ridge]
b. [Rock will be younger as you move away from the ridge]
c. [The age of the rock will not change as you move away from theridge]

9.) Scientists know that new lithosphere is constantly beingcreated at the mid-ocean ridges. However, the Earth is not gettinglarger in size. This means that lithosphere is getting recycledelsewhere. Where does the majority of this older lithosphere endup? Choose the best answer below:
a. [It is assimilated into the mantle]
b. [It is assimilated into the asthenosphere]
c. [It is disintegrated at the plate boundary before itsubducts]
d. [The Earth actually is getting larger in size. Lithosphere isnot being recycled]

Comment

lemonelephant722

2.) What type of rock is the ocean floor made ofprimarily?
a. [Granite] b. [Schist] c. [Marble] d. [Basalt]

6.) Where does the sediment that makes up the continental risecome from?
a. [Continents via Rivers] b. [From the Ocean Floor] c. [Volcanoes]d. [Hawaii]

silvergrasshopper954

7. surface rocks that originated from liquid phase of rock areclassified as a. quartz. b crust, c. sedimentary, d conglomerate,e. metamorphic, f. none of the above.

37 t/f the crust and upper mantile essentially float on semsolid rock

40. whci is NOT a major layer of the earths interior? a. solidinner core, b. mantle, c crust.. d. liquid outer core, e.asthenosphere

42. earthquakes produce waves with what type of movement (markall that apply) a. compresion b. sideways, c. circular, d. noneabove are correct

52 volacnoes with fast flowing liquid lava will be ___ a. talllike a skyscraper b. narrow like a river, c. wide like shields.

53.which of the following is (are) volcanic in origin? a. thebahamas isle. b. hawaian, isle, c. jeky isle, d. gull isle, e.surtsey isl (this is a real ? i think its a trick onetoo)

59. which of the following is NOT a common atom in igneous rock.a. SI b. O c. K d. C e. Na

60 which of the following crystals is NOT commonly found ingranite? a. fieldspar, b. quartz, c. biotite, d. mica, calciumcarbonate

61. the rate at which igenous rock is hardened is shown by the____ of the cystals. a. size, b. color, c. density, d. smell, e.composition

BIO211H5 Lecture Notes - Chloroplast, Gowganda, Lightning

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