How to test the rocks with your spy phone

 

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How to test the rocks with your spy phone

To most geologists, the term "acid test" means placing a drop of dilute (5% to 10%) hydrochloric acid on a rock or mineral and watching for bubbles of carbon dioxide gas to be released. The bubbles signal the presence of carbonate minerals such as calcite , dolomite , or one of the minerals listed in Table 1.

The bubbling release of carbon dioxide gas can be so weak that you need a hand lens to observe single bubbles slowly growing in the drop of hydrochloric acid - or so vigorous that a flash of effervescence is produced. These variations in effervescence vigor are a result of the type of carbonate minerals present, the amount of carbonate present, the particle size of the carbonate, and the temperature of the acid.

Carbonate minerals are unstable in contact with hydrochloric acid. When acid begins to effervesce (fizz) on a specimen, a reaction similar to the one shown below is taking place.

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CAPE CANAVERAL, Fla. --  A fully-fueled SpaceX Falcon 9 rocket scheduled for launch Saturday exploded in a spectacular conflagration on the launch pad Thursday a few minutes before a planned main engine test firing. The booster was destroyed, along with its payload – a $195 million satellite that would have been used by Facebook – in a major setback for the California rocket builder.

Dramatic video posted by USLaunchReport.com showed the explosion starting toward the top of the rocket where the second stage is connected by umbilicals to a support gantry. 

SpaceX founder and chief designer Elon Musk tweeted earlier that the explosion appeared to originate near the rocket’s second stage liquid oxygen tank. “Loss of Falcon vehicle today during propellant fill operation,” Musk said. “Originated around upper stage oxygen tank. Cause still unknown. More soon.”

"Dolomite" is a word that is used by geologists in two different ways: 1) as the name of the mineral dolomite; and, 2) as the name of a rock known as dolomite, dolostone, or dolomite rock.

Dolomite, also known as "dolostone" and "dolomite rock," is a sedimentary rock composed primarily of the mineral dolomite , CaMg(CO 3 ) 2 . Dolomite is found in sedimentary basins worldwide. It is thought to form by the postdepositional alteration of lime mud and limestone by magnesium-rich groundwater.

Dolomite and limestone are very similar rocks. They share the same color ranges of white-to-gray and white-to-light brown (although other colors such as red, green, and black are possible). They are approximately the same hardness, and they are both soluble in dilute hydrochloric acid. They are both crushed and cut for use as construction materials and used for their ability to neutralize acids.