User:Timmyhuanghe/sandbox

= Article Evaluation =

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The articles on cap carbonate is still a stub. It defines what is cap carbonate and talks briefly about the formation. Everything listed here is related to the topic, but not enough reliable and sufficient information is provided. Although this gives the basic information on the subject, it can't provide a strong overview of this topic. Since I am going to list the article, the following sections would be covered: the origins of the cap carbonate, the formation process and how it is related to snowball earth.

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The tone of the article is neutral and precise. Since this is a scientific article, the tone should be objective, formal, confident and concise. The points here are not biased but they can't provide reliable overview.

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Since the articles is a stub, it does not have enough references for us to verify the existing information. There is only one reference here and the link works. The reference supports the article. The source comes from a webpage. The web site is funded through NFS, so the source can be regarded as reliable and neutral.

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Draft your article
Cap carbonate are layers of carbonate which is composed of special chemical composition and unique sedimentary structures. Cap carbonates are unsurprising results of the recuperation from a snowball Earth.

It is interesting that based on the measurements from the cap carbonate sample, the cap carbonate has a low δ 13 C compared with other carbonates, which is -5‰. The progression of late Neoproterozoic glaciations portrayed by cap carbonates and substantial δ 13 C journeys ought to speak to various scenes of out of control ice albedo.

The mechanisms of cap carbonate formation are very clear and there are several different explanations. One explanation indicated that in water surface water, the transport of carbon dioxide from the atmosphere to the ocean will lead to carbonate precipitation. This is caused by mixing upwelling, isotopically-depleted, alkaline bottom water and calcium-rich surface water. One alternative explaining suggested that cap carbonate is just the by-product of continental flooding and it is not closely related with geochemical cycles, snow ball earth and climate change. Experiments have been performed to see if the massive abiotic carbonate is possible in the the extreme environments.