What is the plate?
GeologyWhat are plates explain? A tectonic plate (also called lithospheric plate) is a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere. Plate size can vary greatly, from a few hundred to thousands of kilometers across; the Pacific and Antarctic Plates are among the largest. What is a plate
Why are some rocks transparent?
GeologyBy 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
What is relative age dating?
GeologyRelative 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.
What is Lithification and what are the two most common processes that result in a rock’s Lithification?
Geology questionsDuring cementation, dissolved minerals crystallize and glue sediment grains together. Compaction and cementation, by far, represent the two most common processes involved in lithification, due to the widespread presence of soils and sediments worldwide. What are the two main processes of lithification? The main processes involved in lithification are compaction and cementation. What is lithification?
How does oxidation occur in rocks?
GeologyWhen 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
Is pumice intrusive or extrusive?
Geologyextrusive 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
How is magnetic striping evidence of plate tectonics?
Geology questionsWhen the Earth’s magnetic field reverses, a new stripe, with the new polarity, begins. Such magnetic patterns led to recognition of the occurrence of sea-floor spreading, and they remain some of the strongest evidence for the theory of plate tectonics.When the Earth’s magnetic field reverses, a new stripe, with the new polarity, begins. Such magnetic
Where does granite come from in Canada?
GeologyApproximately 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
How many different eras are there?
GeologyTen 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
What happens to the geosphere during a volcanic eruption?
GeologyVolcanoes (events of the geosphere) release a large amount of carbon dioxide (atmosphere), the raw material for sugar production in plants (biosphere). This may increase photosynthetic production and eventually increase the amount of biomass, which, after a very long time, forms coal and oil deposits (geosphere). What spheres are affected by volcanic eruption? When a