It is a kind of rock. That short enough?
Chalk is softer than the slate (real or artificial) used on blackboards, so it will flake off as you write. Granite is harder than slate and will not flake, but rather cut into or mark the slate permanently.
Earthquakes are caused by the sudden release of energy in the Earth's crust, leading to the shaking and movement of the ground. They can cause destruction of buildings and infrastructure, as well as trigger landslides and tsunamis. Earthquakes are often measured using the Richter scale to quantify their magnitude.
The granite would be older because it had to form first in order for the sandstone to contain pieces of it. The sandstone would have formed later on top of the granite layer.
Granite chippings are granite aggregates that are primarily composed of feldspar and used as paving material. The density of granite chippings is 166.5 lbs / ft3 .
Granite is a heterogeneous material, meaning it is composed of a variety of different minerals that are visible to the naked eye. This gives granite its characteristic speckled appearance.
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