Final Questions Flashcards
What are the best estimates for ocean level rise
30 cm-2.5 m
What does the GCMs suggest about how seasons will be effected
The growing season will be longer and the winters will be warmer
The Paleocene-Eocene thermal maximum PETM refers to
e) non of the above
The Current Level of C02 in the atmosphere (as of Dec,4 2021) as measured in ppm at Mauna Loa is 416ppm
a) 416 ppm
By the upper Devonian what kind of plants were on earth.
Large stratified forests, this was due to a warm interval
Coal, petroleum and natural gas are all derived from
c) partially decomposed organic matter
If temperature and pressures are high enough oil is broken down into
d) natural gas
the type of uranium deposition found in Athabasca basin in northern Saskatchewan is
Unconformity type
what mineral despots type is most likely to form in a tectonic setting where oceanic lithosphere is subducting beneath continental lithosphere
porphyry copper.
When was the last glacial maximum
Currently, in the holocene, the last glacial maximum to occur was 18,000 years ago
Define liquefaction
A phenomenon in which the strength and stiffness of a soil is reduced by earthquake shaking or other rapid loading.
Define the Palocene and Eocene Thermal Maximum
Occurred 55.5 million years ago
There were indications there were increases in temperature
Evidence for Ocean acidification, ocean circulation changed, disrupted carbon cycle, faunal communities were distributed.
Over a 2500 year period, there was a Large Igneous Province (LIP) and major pulses that released methane clathrates
- this released 12,000 Gigatonnes of carbon = 44,000 Gt of C02 ** test question (don’t get carbon and carbon dioxide confused)
At the time atmospheric C02 levels were maybe 1125 PPM
Define angle of repose
a slope angle of unconsolidated material at gravitational equilibrium (the steepest angle at which the material is stable)
- this range is 35 to 45 degrees
The equilibrium is usually based off the wet or dryness of the material. Dry being stable
