One in academia for instance will spend the day doing research and writing papers and lecturing.
Others will be involved in practical work in the field, examining rocks and structures and making deductions about age and formation and so on.
Granite is a hard, igneous rock. It is made up of mica, quartz, feldspar and sometimes bits of other rocks as well. Granite is usually pink, white, or grey. It is crystalline and so shines.
Magma is part of the layer just under the crust.
It reminds us that whilst everything seems solid underfoot actually that is not quite so, and there are only relatively thin layers on top that move and float on a sea of magma underneath, it is this that moves the continents around the surface of the planet, all be it very slowly indeed.
Sedimentary rocks have a clue to their origin in the name – sediment.
They are the products of lots and many dead marine creatures, which piled up on the sea floor as they were formed in water. These piled up together over a period and the pressure of them all caused the formation of rock.
Carbon 14 has a half-life of 5,730 years, and therefore it can be used to date very accurately a large majority of things, particularly wood and so on.
It is only not useful for ancient things where all the carbon 14 will have gone, or almost gone – and for these there are other isotopes of other elements, that can be used with a much longer half-life.
Radon is a radioactive gas that is associated with certain rocks, so perhaps this is a measure of the geology of the area, as in the rocks that are present in that location?
Specifically gases that are found in the magma correspond to having been formed at pressures many times greater than those in the outer core have, and rather therefore indicate that it was formed elsewhere.
Well each type of volcano can be very destructive and if you are talking in human loss of life terms than the answer is any type of volcano that is near dense population.
The most destructive type of volcano though that is generally acknowledged; as such, independent of people is that which is called the stratovolcano.
The rock is being subjected to intense heat and pressure at the time – this is what causes the dramatic stresses that are indeed what happens during the metamorphic process and what triggers the profound change in the chemical make up or constitution of the rocks.
Igneous rocks – got to that stage of your geography or chemistry class already?
Well here is a little information for you on the ways in which igneous rocks can form.
Igneous rocks are created when melted material crystallizes, e.g. from magma.
There are two formation methods, the first is that they form on the surface and these are called extrusive igneous rocks, or they can form inside the crust, and these ones are called intrusive igneous rocks.