Because most of the buildings were built of granite which was quarried locally at Rubislaw Quarry. When the quarry was operational, it was the deepest in Europe but it is now closed (because the granite has all been used up) and has been infilled with waste matter from the city.
No, there has never been a country called Aligania. It does not correspond to any recognized country in history.
The biggest quarry in the world is the Carrara Quarry in Tuscany, Italy. It is famous for producing high-quality white marble that has been used in sculptures and buildings for centuries. The quarry covers an area of about 0.5 square miles and reaches depths of over 650 feet.
Cuba.
George Washington
No, there has not been a country called Aligania. It is likely a fictional or hypothetical name.
That will depend on many things, such as the laws of the particular country and the local geology. Two things that have been done in the past are using it for landfill, and flooding it to make a watersports/nature amenity.
A place, typically a large, deep pit, from which stone or other materials are or have been extracted.
When you have to leave a country you are being deported or exiled.
Whatley Quarry has been in operation since the 1930s, with quarrying activities starting in the 1960s. It is one of the largest limestone quarries in the UK and has been supplying construction materials for over 50 years.
I would imagine the huge bricks that they are built of would have been cut out of sandstone, at a nearby quarry.
This past week I visited a limestone quarry that has been mining limestone in one place for 40 years. In that time, they will have mined millions of tons of limestone. Usually nearly ALL the rock is limestone, so the answer will depend on the size (area) of the quarry, how deep you can mine, and presence of any "trash" rock.