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... of methane, which leads to the formation of calcium carbonate in anoxic conditions . It's done by a consortium of methane oxidising ... into more detail. Calcite - calcium carbonate. In the anoxic conditions on Mars, in presence of methane, a ...

Article - Robert Walker - Mar 12 2018 - 12:38am - 0 attachments

... Another connection to the past is the use of calcium carbonate or lime, formed by the disposition of ancient shelled sea organisms. ...

Blog Post - David LePoire - May 9 2017 - 1:21pm - 0 attachments

... works at room temperature. The scientists used a calcium carbonate nanopowder as the starting material and instead of firing it, they ... exerted by overlying deposits. This process turns calcium carbonate sediment into limestone with the help of the surrounding water. As ...

Article - News Staff - Mar 3 2017 - 3:45pm - 0 attachments

... varnish similar to Mars. [111] [132] Carbonate rocks with iron oxide coatings similar to Mars - niche for microbes ... P.; Brown, Adrian J.; Perry, Kaysea A. (2011). "Carbonate rocks in the Mojave Desert as an analogue for Martian carbonates" ...

Article - Robert Walker - Jan 11 2017 - 10:54pm - 0 attachments

... is used up in the formation of limestone and other carbonate rocks.  One has felt entitled to estimate the additional ... transporting very insignificant quantities of calcium carbonate relative to the rivers that take it up in limestone areas, so one can ...

Blog Post - Patrick Lockerby - Dec 21 2016 - 6:50pm - 0 attachments

... organics have been found from the Archaean period. Carbonate deposits - on Earth these preserve biosignatures from pre-cambrian ... could easily include fossil beds, like chalk (calcium carbonate). It is also one of the most ancient regions on Mars. And has plenty ...

Blog Post - Robert Walker - Dec 24 2016 - 10:39am - 0 attachments

... or climate changes, according to an analysis using carbonate isotopy in fossilized teeth that 250,000 years ago, the ancestors of ... from the excavation site at Payre in southeastern France. Carbonate is an essential mineral component of the hard tissue in bones and ...

Article - News Staff - Nov 28 2016 - 6:53am - 0 attachments

... intricate and while we have known that magnesium, carbonate and fluoride ions influence enamel properties scientists have never ...

Article - News Staff - Sep 19 2016 - 1:38am - 0 attachments

... presence of CO 2 which leads to formation of calcium carbonate, steadily removing calcium oxide from the system. But on the Moon ...

Article - Robert Walker - May 21 2016 - 10:26pm - 0 attachments

... shells using a recently developed technique called the carbonate clumped isotope paleothermometer. The new technique, which avoids ...

Article - News Staff - Jul 7 2016 - 12:30pm - 0 attachments