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What is the number of years that have passed sice a rock was formed?

To determine the number of years that have passed since a rock was formed, one would need to know the specific age of the rock. This age can often be estimated using radiometric dating techniques, which measure the decay of isotopes within the rock. For example, if a rock is determined to be 100 million years old, then 100 million years have passed since its formation. Without knowing the specific age of the rock in question, it is impossible to provide an exact number of years.


How many rock quarries are in the world?

There is no exact number of rock quarries in the world as they are constantly changing due to opening, closing, and merging of operations. However, it is estimated that there are tens of thousands of rock quarries globally.


The absolute age of a rock is the approximate number of years ago that the rock formed. The absolute age of an igneous rock can best be determined by?

It is best determined by radiometric dating techniques which measure the decay of radioactive elements.


Is lava a sedimentary rock or igneous?

The common usage of "lava rock" in the USA refers to a black rock with a number of visible bubbles or air pockets that is formed from cooled lava on the surface. Although lava rock is an igneous rock, it is not the same as the definition for the word igneous, which can also include igneous rocks which have solidified from magma below the surface.


What is the coordination number of each type of ions in a rock salt type crystal structure?

Six. Explanation: Rock salt (NaCl) is ionic crystalline compound having Na+ and Cl- ions. Each Na+ is surrounded by 6 Cl- ions and vice versa. Coordination number for an ion is the number of oppositely charged ions around it. So it is 6.