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We evaluate whether the global weathering budget is near steady state for the pre-anthropogenic modern environment by assessing the magnitude of acidity-generating volcanic exhalations. The weathering rate induced by volcanic acid fluxes, of which the CO2 flux is the most important, can be expressed as an average release rate of dissolved silica, based on a model feldspar-weathering scheme, and the ratio of carbonate-to-silicate rock weathering. The theoretically predicted flux of silica from chemical weathering is slightly smaller than the estimated global riverine silica flux. After adjustment for carbonate weathering, the riverine dissolved bicarbonate flux is larger than the volcanic carbon degassing rate by a factor of about three. There are substantial uncertainties associated with the calculated and observed flux values, but the modern system may either not be in steady state, or additional, "unknown" carbon sources may exist. The closure errors in the predicted budgets and observed riverine fluxes suggest that continental weatheringrates might have had an impact on atmospheric CO2 levels at a time scale of 103-104 years, and that enhanced weathering rates during glacial periods might have been a factor in the reduced glacial atmospheric CO2 levels. Recent anthropogenic emissions of carbon and sulfur have a much larger acid-generating capacity than the natural fluxes. Estimated potential weathering budgets to neutralize these fluxes are far in excess of observed values. A theoretical scenario for a return to steady state at the current anthropogenic acidity emissions (disregarding the temporary buffering action of the ocean reservoir) requires either significantly lower pH values in continental surface waters as a result of storage of strong acids, and/or higher temperatures as a result of enhanced atmospheric CO2 levels in order to create weatheringrates that can neutralize the total flux of anthropogenic and natural background acidity.
What else can I help you with?
What kinds of rocks would you need to find an aquifer?
To find an aquifer, you would typically need to look for rocks that are porous and permeable, such as sandstone, limestone, or fractured volcanic rock. These types of rocks allow for the movement and storage of water within their spaces, forming potential underground reservoirs from which water can be extracted.
What type of rock would likely be found in an ancient riverbed on the earth's surface?
Sedimentary rocks, such as sandstone, shale, or conglomerate, are likely to be found in an ancient riverbed on the Earth's surface. These rocks are formed from the accumulation and compaction of sediments carried by rivers over time.
What kind of rock do fossils form?
Sedimentary rock, its rarely found in metamorphic and never found in igneous rock because it would make the fossil of the animal worped and changed. It wouldn't be with the original form on metamorphic and igneous would destroy the whole fossil.
What rock would have the greatest porosity?
Sandstone generally has the greatest porosity among rocks due to its high content of interconnected pores. This is why sandstone is commonly used as an underground reservoir for oil and natural gas.
Can gold be found in sandstone?
Gold can indeed be found in sandstone, as it can be deposited in sedimentary rocks like sandstone through various geological processes. Gold is often found in quartz veins within sandstone, where it has been concentrated over time. Geologists use various methods such as prospecting, mapping, and geochemical analysis to locate and extract gold from sandstone deposits.
Where would you most likely find fossil bearing rocks?
The most likely place would be at a limestone or dolostone rock quarry. However, fossils can be found in an abundance of places. Fossils are common in landscaping gravels, or anywhere mixed rocks are found.
What three major classes of rock would you expect to find as bedrock in Mt Shasta?
The three major classes of rock that you would expect to find as bedrock in Mount Shasta are metamorphic rocks, igneous rocks (such as andesite, dacite, and basalt), and sedimentary rocks. Metamorphic rocks would likely include schist, gneiss, and marble, while igneous rocks might be found in the form of lava flows and volcanic rocks. Sedimentary rocks like limestone and sandstone could also be present in the region.
What kind of soil would develop from quartzite and sandstone?
sandstone or quartzite is very hard stone i think there is no possibility that it can form a soil....because if undergo weather cycle it only form igneous rocks which is smaller and less harder than the original properties
Would rocks be soft and crumbly after an ancient volcanic eruption?
If they were under a lot of pressure, they would be forced together to make more rocks but it really depends which type of rock it is. If it were sandstone, it would crumble like normal but granite would stay together.
Which rocks would most likely contain a fossil in rock and minrol?
Sedimentary rocks, such as shale, sandstone, and limestone, are most likely to contain fossils. These rocks form from the accumulation of sediment and often preserve the remains of plants and animals. Fossils are less commonly found in igneous and metamorphic rocks, as these rocks form from molten material and intense pressure and heat, which usually destroy any existing fossils.
Would sedimentary rocks be found on the moon?
No sedimentary rocks are found yet. The reason is moon is lack of atmosphere.
What group of rocks would granite be?
Granite is an igneous rock.
