Nitrogen Cycle
Driver of Atmospheric Fixation
Lightning
What type of SiO2 is the easiest to dissolve
Biogenic Opal / Opal A
What kind of plants are grass/corn
C3
What was the PETM
Paleocene-Eocene Thermal Maximum
What does the delta notation represent
Ratio of Heavier/Lighter Isotopes
Driver of Biological Fixation
Microbes
Primary sink of silica
Diatoms/Radiolaria/BSi
The transformation of carbon dioxide and nutrients into organic carbon -> sinking into the deep ocean, and its decomposition at depth
Carbon Pump
What do BIFs indicate
Periods of low Marine/Lacustrine Ventilation
What cycle is composed of eccentricity, obliquity, and precession
Milankovitch cycles
What processes oxidizes Nitrogen molecules
Nitrification
What are the major reservoirs for the Sulfur cycle [Minerals]
Pyrite and Gypsum
What Hypothesis states: Cool periods at high latitudes reduces productivity, allowing H4SiO4 to move towards the equator driving productivity
Silicic Leakage Hypothesis
What event occurred ~2.4-2.3Ga
Great Oxidation Event
What does the LR04 Benthic Stack Represent
Sea Level, Global Temperature, Ice Volume
Why do living organisms need nitrogen
to make proteins and dna
What Cycle changed significantly during the Cenozoic, characterized by intensity of hydrothermal activity, Volcanism, and large burial of pyrite occurred
Sulfur Cycle
SiO2
What is an oxidation-reduction reaction
redox reaction
What is the complete Chemical dissociation of H2CO3
H2CO3 --> HCO3 --> CO3
What type of bacteria are agents of denitrification
Anaerobic
4 steps of the Sulfur cycle
(1) mineralization of organic sulfur into inorganic form (converted to sulfide mineral)
(2) Oxidation (sulfide->sulfate)
(3) Reduction (sulfate-sulfide)
(4) incorpation of sulfide into organic compound
What is defined as the water depth at which the rate of supply of calcium carbonate from the surface is equal to the rate of dissolution
Carbonate Compensation Depth
What are OAEs
Oceanic Anoxic Events
[Sulfur cycle ppt]
What method measures Organics/CaCO3/Non-Combustibles material from sediment samples
Loss On Ignition