Geology 103 Exam 2 Prep

The Yavapai and Mazatzal Orogenic belts are located:

• along the eastern margin of North America,
  

• along the southern margin of North America,

• along the northwestern margin of North America,

• along the northern margin of North America,

• in the interior of North America

The breakup process of a supercontinent may produce a(n):

• passive continental margin

• oceanic ridge system

• failed rift (aulocogen)

• passive continental margin and failed rift (aulocogen) only

• passive continental margin, oceanic ridge system, failed rift (aulocogen) are correct only

The eruption of vast quantities mafic lava at 1100 Ma occurred in the:

• Cretaceous Period
• mid-continent rift

• failed rift

• continental rift

The supercontinent produced approximately 1.0 billion years ago by orogenic events related to the Grenville Orogeny and its equivalents is the:

• Nain

• Pangea

• Stromatolite

• Rodinia

• Nena

After the rifting of Rodinia from approximately 750-600 Ma, the continental edges of North America are continental ______ margins and areas of ________

• oceanic crust formation
• active

• thick clastic sediment accumulation
• volcanic activity
• passive

What is believed to have climatically occurred on the surface of Earth as Rodinia rifted apart around 717 Ma?

• Chance of Increased Oxygen Levels
• Possibility of Snowball or Slushball Earth glaciation
• Probability of Global Drought
• Possibility of Volcanic Eruptions

The first life on Earth is believed to be:

• Anaerobic prokaryote
• Multicellular organism
• Aerobic prokaryote
• Photosynthetic eukaryote

What are three possible scenarios for the location of the development of life on Earth.

• Oceanic Vents in the deeper oceans

• Frozen mountaintops
• Warm Shallow Surface Ponds along shorelines

• Extraterrestrial carbonaceous chondrite delivery

• Underground magma chambers

What organism influences the initial increase in oxygen on Earth?

• Algae
• Photosynthetic Cyanobacteria
• Fungi
• Mosses

What is the GOE? When did it occur? (2 pts)
Great Oxidation (Oxygenation) Event 2.3 Ga

• Great Oxidation (Oxygenation) Event

• 2.3 Ga

• the time when O2 can actually start to be found as a component in the hydrosphere and atmosphere

• 3.2 Ga