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" ... Microorganisms are one of the architects of the natural world - able, despite their minute size, to "build" massive mountains. Dolostone is a common variety of limestone, characterized by its high content of calcium and magnesium. Calcium and magnesium are commonly found in seawater, however in experiments dolomite is chemically very hard to precipitate directly from water. U.S. geologist James Dwight Dana studied the reefs and atolls in the South Pacific and discovered that dolomite can be found in the local sediments. This was an important observation, as it demonstrated that dolomite can form directly from tropical seawater. ... "
" ... The "carbonate" part, however, is universal to limestone on Earth, as well as other ocean-deposited minerals like the magnesium-rich dolomite. It's the carbon dioxide in the atmosphere that leads to the formation of carbonate rocks, as ... "
" ... The minerals composing such rocks crystallize at high temperatures and pressures inside Earth. Under atmospheric conditions, such minerals are not stable and are very susceptible to physical and chemical weathering. Calcite and dolomite in carbonate rocks, limestone, dolostone and marble, are soluble in water and tend to erode quickly. Minerals like feldspar and mica, making up plutonic rocks like granite and metamorphic rocks like gneiss and schist, tend to react with water and oxygen, decaying to clay minerals. Carbonate minerals and feldspars are also vulnerable to air pollution. Sulfuric components or nitrogen from car exhaust fumes and industry will increase weathering and decay. Plutonic and metamorphic rocks are made of relatively large crystals of different minerals with different physical properties, and every mineral expands with the temperature at different rates. If the sun heats a gravestone, the mineral grains will expand, causing strain to build up. At night, with falling temperatures, the mineral grains will contract again. Repeated day by day, the thermal expansion and contraction will break apart the entire gravestone. ... "
" ... The structures found in Greenland are almost 200 million years older as the previous oldest fossils of microbes found in Australia. They formed just 300 to 100 million years after the conditions on the primitive Earth became favorable for life. Unfortunately, the metamorphic rocks of the Isua-Formation didn't preserve fine details, so there is no direct evidence of cell structures to be found. According to the scientists, the distribution of isotopes suggests that the layered rock formed definitively under water and are sedimentary rocks in origin. The presence of the mineral dolomite could suggest that microbial activity was involved in the formation of the Isua-Formation. Dolomite is a mineral that can be formed during the evaporation of seawater. Microbes significantly accelerate the precipitation of dolomite crystals and it is believed that most dolomite in Earth's history formed thanks to microbial activity. The most compelling evidence, according to the scientists, is the strange shape of the studied structures. The structures in the layered rocks appear cone-shaped in section, similar to genuine stromatolites found in 3,4-2-billion-year-old rocks from Australia. ... "
" ... You say that starting in 1999 you focused on “tiny plots” for their terroir and the “dolomite rosa” soil. How does this differ from the soil of lesser areas? ... "