Evan Clark Aleeza Qamar Michael Batista Nicole Murray ... · Aleeza Qamar . Michael Batista ....
Transcript of Evan Clark Aleeza Qamar Michael Batista Nicole Murray ... · Aleeza Qamar . Michael Batista ....
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Evan Clark Aleeza Qamar
Michael Batista Nicole Murray Kristina Bates Sol Cordova Juvariya Lat
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Formation Geology Apollo Landing Sites Picture Analysis Timeline
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Negating Evidence: A body passing near
the Earth would likely collide with it rather than orbit it.
Says that the Earth captured the Moon in it’s gravity.
4.5 Billion Years Ago
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Negating Evidence: Earth would have to be spinning extremely fast in order to throw off enough material.
Postulated that the Earth was spinning extremely fast.
4.5 Billion Years Ago
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Negating Evidence: Does not explain how the ring of material that formed the Moon could have acquired enough circular motion to stay in orbit around Earth.
Earth and Moon formed concurrently from a cloud of gas and dust.
4.5 Billion Years Ago
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The best explanation for how the Moon was formed.
Moon formed as a result of a colossal impact with a Mars-sized body.
There are elements on the Earth that are similar to what is on the Moon.
4.5 Billion Years Ago
Negating evidence: Models show that much of the material would re-bound and hit the Earth again.
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While the moon was forming, the less dense material rose to the surface creating the highlands.
4.4 Billion Years Ago
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A time of heavy bombardment of the inner planets and the moon.
Most, if not all, of the basins on the
moon theorized to have been created in this time period.
3.92-3.85 Billion Years Ago
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Cause: 1:2 resonance: where Saturn
and Jupiter migrated such that Saturn orbited once for every two orbits of Jupiter.
This is theorized to have caused sporadic movement of meteors and planets.
3.92-3.85 Billion Years Ago
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Proof: Many impact melt breccias
found in exploration of moon were created between the 3.92 to 3.85 billion years ago.
There are few found before or after that time period.
3.92-3.85 Billion Years Ago
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Skepticism: Apollo program only took from
a single impact basin, so the evidence should be expected as such.
3.92-3.85 Billion Years Ago
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Alternate ideas: Stone-wall effect: the idea
that the impact craters during the Lunar Cataclysm covered the older craters. Disproved by the finding of lava
flows up 4.25 billion years ago.
3.92-3.85 Billion Years Ago
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The mare-basalt magmas originated by partial melting of ultramafic mantle material
Dark spots on surface of the moon Cover 16% of surface, 30% near side, 2% far side
Resemble terrestrial volcanic terraces
3.92-3.85 Billion Years Ago
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Formed after the moon’s creation 2 stage process formation:
source of heat planetary accretion(2nd stage melting)
3.5 Billion Years Ago
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The moon was almost completely molten when it formed This is determined by the
composition of the lunar crust
The magma ocean took 100 million years to solidify
Formation of much of the anorthosite crust (crystallization 75% completed), 61 million years later
End of crystallization (maybe a few percent magma left over), 39 million years later
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Simple Craters Complex Craters
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Floor is underlain by lens-shaped deposit of broken material, breccia lens.
Typically created by smaller meteors.
Smooth bowl-shaped craters.
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Consists of inward-facing terraces that have slipped downward.
Flat floors, terraced walls, central peaks.
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Long, narrow depressions in the moon's surface resembling channels.
Three types:
Sinuous Rilles Arcuate Rilles Straight Rilles
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Found in lunar mare which is filled with basaltic rock.
Characterized by their meandering curves.
Remnants of ancient lava flows.
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Have smooth curvatures
Found on the edges of the dark lunar maria.
Formed from cooled magma.
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Long and undeviating
Cut surfaces
outside mare-filled basins
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Concentrated in the Marius Alls Reflect variations in composition / eruptive process Favorite by Apollo mission in hope of yielding different volcanic rocks
Circular features with low profiles topped by small smooth rimmed craters Major factor in endogenic interpretations of Maria Concentrated in Marc Tranquillitatis
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Pink Circles- Domes
Green Circles- Cones
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Red Circles- Domes
Yellow Circles- Cones
Blue Outline- Sinuous Rille
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White-Straight Rille Yellow Circles-
Simple Craters
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1) Dome 2) Dome 3) Dome 4) Dome 5) Cones
1 2
3
3
4
4
5
5
5
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1) Sinuous Rille 2) Dome 3) Dome 4) Dome
1
2
3
4
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1) Highlands: ~4.5 billion years ago
2) Mare: ~3.9 billion years ago
3) Straight Rille
4) Complex Crater
2
1
3 4
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Ranger Missions (1961-1965) Lunar Orbiter (1966-1967) Apollo (1963-1965) Clementine (January 1994- June 1994) Lunar Prospector (Launched January 7,1998;
Duration: 5 hrs) Lunar Reconnaissance Orbiter (2009-Ongoing)
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The Scientific Legacy of Apollo, Jeffrey Taylor, 1994, Scientific American, volume 271, number 1, pages 40-47
Origin of the Earth and Moon, G. Jeffrey Taylor, 1998, Planetary Science Research Discoveries, http://www.psrd.hawaii.edu/Dec98/OriginEarthMoon.html.
Time to Solidify an Ocean of Magma, G. Jeffrey Taylor, 2009, Planetary Science Research Discoveries, http://www.psrd.hawaii.edu/Mar09/magmaOceanSolidification.html.
The Oldest Moon Rocks, Marc Norman, 2004, Planetary Science Research Discoveries, http://www.psrd.hawaii.edu/April04/lunarAnorthosites.html
Wandering Gas Giants and Lunar Bombardment, G. Jeffrey Taylor, 2006, Planetary Science Research Discoveries, http://www.psrd.hawaii.edu/Aug06/cataclysmDynamics.html
Lunar Meteorites and the Lunar Cataclysm, Barbara A. Cohen, 2001, Planetary Science Research Discoveries, http://www.psrd.hawaii.edu/Jan01/lunarCataclysm.html
http://www.lpi.usra.edu/nlsi/education/hsResearch/resources/index.shtml http://www.lpi.usra.edu/nlsi/education/hsResearch/resources/index.shtml Mare Materials, Don Wilhelms, 1987, The Geologic History of the Moon: USGS
Professional Paper 1348, http://ser.sese.asu.edu/GHM/ghm_05txt.pdf Structure, Don Wilhelms, 1987, The Geologic History of the Moon: USGS Professional
Paper 1348, pg. 107, http://ser.sese.asu.edu/GHM/ghm_06txt.pdf http://www.lpi.usra.edu/nlsi/education/hsResearch/resources/index.shtml http://www.lpi.usra.edu/nlsi/education/hsResearch/resources/index.shtml