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= Carbonate-Silicate Cycle =

Content
At first glance the article seems to have a very informative opening with good information to introduce the Carbonate-Silicate Cycle. It gives characteristic description of the cycle of focus as well as relay how the cycle itself relates to the Carbon cycle and what role it plays there. Aside from the more worded descriptions of the cycle, it also gives the chemical reactions that take place and explains what minerals are involved and the conditions of which the scenario needs to be in. The format of the article could use some work, the entire article is basically one large paragraph which is a lot for the eyes. Overall, content is good to start with, the article needs to be reformatted with alterations completed on sources and content displayed.

Tone
From the way it has been structured, the actual article upholds the rule of tone being completely neutral and the point of view remains in third, both of which are good. There is one reference that seems to be by one professor which is concerning since it is one viewpoint, but it seems to have translated into the article's information perfectly.

Talk Page
As for activity on this page, the talk page is not that active, the last post was made at the end of April 2017. There's a total of three posts on the talk page itself, none form a cohesive conversation, all were merely stating the issues of the article and a possible minor edit the user made.

Contribution Drafts
Overview of the cycle (might replace existing in article):

Lead (combined with pre-existing): The carbonate-silicate cycle is a major part of the large scale global carbon cycle, it is the process of dissolving silicate minerals into carbonate rocks of which influence the release of carbon from the lithosphere.

The carbonate-silicate cycle throughout time has been a key factor in controlling the Earth's climate, it has served to control carbon dioxide levels and by proxy, temperature. The process begins with atmospheric carbon dioxide dissolving and being absorbed into clouds and converting to carbonic acid, allowing for acidic rainfall. This rainfall as it makes contact with land causes an effect called "weathering"; it causes erosion and the dissolving of minerals including calcium, magnesium, bicarbonate and silicate. The minerals, specifically calcium carbonate, make their way to bodies of water where they settle into sedimentary layers or get incorporated into the ecosystem via aquatic organisms. The leftover carbonate gets pulled into subduction zones past the ocean floor where they recombine with the silicate particles. These particles are then vented along with other silicates to release gaseous carbon dioxide which is vented through volcanoes. The cycle helps to maintain the earth's carbon dioxide levels at average levels as well as promote geological change.

Expanding, how does it effect life?

Lead:

The question could be asked what would happen to the earth and the systems within it, if the carbonate-silicate cycle did not exist. Looking back at a time where vascular plants and carbon dioxide consuming organisms were not bountiful, the carbonate-silicate cycle was the primary stabilizer in the Earth's carbon dioxide level. The ability for minerals to be broken down and reformed without the use of organic lifeforms proved useful specifically during the Precambrian and early Paleozoic eras. Now that biota of present day are flourishing, the cycle runs more effectively with multiple routes available for the minerals to be dissolved.The organisms allow for improved reprocessing of water and enhance the production of acids in soil, this creates more deposits of carbon dioxide in soil, increasing the rate of weathering as the carbon dioxide is consumed and converted to carbonic acid.

The Carbonate-silicate cycle and the global biosphere

Although the carbonate-silicate cycle is primarily driven by natural earth processes such as weathering and sedimentary, other aspects of life have an influence as well. Plants, for example, produce organic acids that raise the weathering rate. These acids are produced mainly by root and mycorrhizal fungi secretion along with microbial plant decay. More specific to the carbonate-silicate cycle, they also produce carbonic acid via root respiration and the oxidation of organic soil matter, which produces CO2, which will be consumed and converted to carbonic acid. Through the assistance of the plant produced acid, an increase in weathering by a factor of two can be expected.

Other non-organic influences on the cycle include geological formations. For example, as large mountains and mountain ranges such as Tibetan Plateau (includes Mt. Everest), the Himalayas and the Andes, continue to grow vertically, chemical weathering rates are affected. Each mountain has a respective river that weathers and transports dissolved load into the ocean, donating approximately 20 percent of the dissolved load. Combining this chemical weathering with other smaller rivers, influences the rate of the carbonate-silicate cycle relative to the ocean.

"Sources"
Batalha, Natasha; Kumar Kopparapu, Ravi; Haqq-Misra, Jacob; Kasting, James F. (2016) .“Climate cycling on early Mars caused by the carbonate–silicate cycle”. Earth and Planetary Science Letters. 455: 7 -13. https://doi.org/10.1016/j.epsl.2016.08.044

Berner, Robert A. (1992). “Weathering, plants, and the long-term carbon cycle”. Geochimica et Cosmochimica Acta. 56(8): 3225 -3231. https://doi.org/10.1016/0016-7037(92)90300-8

Ridgwell, Andy; Zeebe, Richard E. (2005).“The role of the global carbonate cycle in the regulation and evolution of the Earth system”. Earth and Planetary Science Letters. 234(3-4): 299-315. https://doi.org/10.1016/j.epsl.2005.03.006

Ittekkotc, Venugopalan; Humborg, Christoph; Schäfer, Petra (2000). “Hydrological Alterations and Marine Biogeochemistry: A Silicate Issue?: Silicate retention in reservoirs behind dams affects ecosystem structure in coastal seas”. BioScience. 50(9): 776-682. https://doi.org/10.1641/0006-3568(2000)050&#x5B;0776:HAAMBA&#x5D;2.0.CO;2

Sundquist, Eric T. (1991). "Steady- and non-steady-state carbonate-silicate controls on atmospheric CO2". Quaternary Science Reviews. 10 (2-3): 283–296. doi:10.1016/0277-3791(91)90026-q. ISSN 0277-3791.

Raymo, Maureen E.; Ruddiman, William F.; Froelich, Phillip N. (1988). “Influence of late Cenozoic mountain building on ocean geochemical cycles”. Geology. 16(7): 649-653. https://doi.org/10.1130/0091-7613(1988)016&#x3C;0649:IOLCMB&#x3E;2.3.CO;2