GLGY 301 FINAL UPDATED Actual Exam Questions and CORRECT Answers
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Course
GLGY 301
Institution
GLGY 301
GLGY 301 FINAL UPDATED Actual Exam
Questions and CORRECT Answers
Who was the first to describe the phenomenon of extinction and when - CORRECT
ANSWER- georges cuvier in 1796
what are the two types of extinction - CORRECT ANSWER- normal background and
mass extinction
what is normal backgrou...
GLGY 301 FINAL UPDATED Actual Exam
Questions and CORRECT Answers
Who was the first to describe the phenomenon of extinction and when - CORRECT
ANSWER- ✔✔georges cuvier in 1796
what are the two types of extinction - CORRECT ANSWER- ✔✔normal background and
mass extinction
what is normal background extinction - CORRECT ANSWER- ✔✔extinction rates less than
or equal to the rate of speciation over time
what is mass extinction - CORRECT ANSWER- ✔✔rate of extinction greatly exceeds the
rate of speciation. usually defined by the loss of more than 75% of known species in a
geologically short interval
why are mass extinctions important in evolution - CORRECT ANSWER- ✔✔clears out
niches, leaving low diversity remnants of once diverse lineage, makes ecological
opportunities available leading to proliferation / diversification of new lineages
what are the causes of mass extinctions - CORRECT ANSWER- ✔✔extensive flood basalt
volcanism - can change temp by adding greenhouse gases
sea level fall - impacts marine org,
ocean anoxia - low oxygen in ocean, could be related to gases in atmosphere
asteroid impact - crater in the yucatan peninsula (mexico)
when was the end permian extinction - CORRECT ANSWER- ✔✔about 250MA
what percent of known marine and terrestrial genera were wiped out in the end permian
extinction - CORRECT ANSWER- ✔✔90-95% of marine, 70% of terrestrial genera
how long was the duration of the end permian mass extinction - CORRECT ANSWER-
✔✔200,000 years
,what was the itchysoaurs - CORRECT ANSWER- ✔✔marine reptile, very few sites of this
age in the world. This one was found in the sulphur mountain formation
had both rounded and knife like teeth
sulphur mountain formation - CORRECT ANSWER- ✔✔rare fossil bearing unit for its age
diverse assemblage of early-middle triassic itchysoaurs - improved early evolutionary history
- found in BC
Where would you find conodonts, ammonoids and what does this area show - CORRECT
ANSWER- ✔✔west coast of BC - shows that some terranes of the cordillera formed near the
equator
Where would you find trilobites - CORRECT ANSWER- ✔✔found in abundance near
cranbrook
Where would you find ichtyosaurs - CORRECT ANSWER- ✔✔in wapti lake in eastern
central BC and near the alberta boarder, also found in prince george and van island, prince
george has a fossils of over 30M long
Where are fossils found that show mass extinction, what is the main fossil of study -
CORRECT ANSWER- ✔✔fossils found on queen charlotte islands ~ 65MA, found through
radiolarian microfossils
where would you find a plesiosaurs, mosasaurs and elasmosaur - CORRECT ANSWER-
✔✔van island - has an 80M y/o elasmosaur
where would you find ammonites and ancient submarines - CORRECT ANSWER- ✔✔near
Fernie BC, floating in water, largest ammonite was 2m in diameter
Where were cretaceous forests found - CORRECT ANSWER- ✔✔Vancouver island
what type of environment was the eocene environment - CORRECT ANSWER- ✔✔lake
environment - important as is links the salmon with the grayling family
, when was the eocene period - CORRECT ANSWER- ✔✔55-34MA
importance of fossil pollen and climate change - CORRECT ANSWER- ✔✔10000-7000YA,
modern forests developed 4000YA - the world got increasingly more moist, pollen can give
evidence of climate change as pollen preserves extremely well - reveals ancient plant life
When did work start in the CR? And why did modern understanding not come until the
1990's? - CORRECT ANSWER- ✔✔work started in 1868, there were prior difficulties,
helicopters, air photos and base maps allowed work to progress
1669: what was nicolas steno's contribution to geology - CORRECT ANSWER- ✔✔law of
superposition - rocks on the bottom are oldest
law of original horizontality - horizontal sheets
lateral continuity - sheets of sed rocks are continuous
1799: what did william smith do - CORRECT ANSWER- ✔✔lived in england, noticed beds
were dipping, first person to systematically map rocks, produced geo map of england
1868: what did R.G McConnell do - CORRECT ANSWER- ✔✔surveying frank slide,
worked in the RM, McConnell thrust fault, came up with first geo cross section of RM -
noticed older rocks on top of newer rocks in the cordillera - thrust faulting
what is an unconformity? why are they important - CORRECT ANSWER- ✔✔erosional
surface that represents part of missing period of time, important as they tell us about uplift,
geo history
who mapped in the omineca belt and near the BC - alta border from 1900-1924 - CORRECT
ANSWER- ✔✔A.O Wheeler
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