on April 15, 2022
Why are some rocks transparent?
Regional SpecificsBy nature, rocks can be transparent, translucent or opaque. These properties depend on the amount of light absorbed and transmitted through the rock, as well as the chemical structure of the rock. Transparent rocks scatter light and are therefore partially transparent. What does it mean when a rock is transparent? Terminology: Opaque – no light
on April 15, 2022
What is relative age dating?
Regional SpecificsRelative dating is the science of determining the relative order of past events (i.e., the age of an object in comparison to another), without necessarily determining their absolute age (i.e. estimated age). What is relative dating method? Relative dating methods estimate whether an object is younger or older than other things found at the site.
on April 15, 2022
How does oxidation occur in rocks?
Regional SpecificsWhen rocks, particularly those with iron in them, are exposed to air and water, the iron undergoes oxidation, which can weaken the rocks and make them crumble. What are 4 examples of physical weathering? These examples illustrate physical weathering: Swiftly moving water. Rapidly moving water can lift, for short periods of time, rocks from the
on April 15, 2022
Is pumice intrusive or extrusive?
Regional Specificsextrusive volcanic rockextrusive volcanic rock, produced when lava with a very high content of water and gases is discharged from a volcano. As the gas bubbles escape, the lava becomes frothy. When this lava cools and hardens, the result is a very light rock material filled with tiny bubbles of gas. What is the example
on April 15, 2022
Where does granite come from in Canada?
Regional SpecificsApproximately 80 to 90% of the granite produced as architectural stone in Canada comes from Québec. Nearly twenty-five companies quarry granite in sixty-odd quarries. In Québec, the main producer is the Saguenay–Lac-Saint-Jean Region, with 40% of total production, followed by the Capitale-Nationale Region, with 30%. Where does my granite come from? Granite comes from deep
on April 15, 2022
How many different eras are there?
Regional SpecificsTen eras are recognized by the International Union of Geological Sciences: the Eoarchean Era (4.0 billion to 3.6 billion years ago), the Paleoarchean Era (3.6 billion to 3.2 billion years ago), the Mesoarchean Era (3.2 billion to 2.8 billion years ago), the Neoarchean Era (2.8 billion to 2.5 billion years ago), the … What are