Most modern bridges are steel structure or framework. Limestone, dolomite and marble have been used in many historic buildings attesting to their durability.
Granite is one kind of hard rock.
many have been used, but reinforced concrete is preferred now as properties are more predictable and consistent.
limestone
Most metamorphic rocks are very hard. They are often impermeable. These factors make them useful for building materials which last well.
Sedimentary rock is useful in various industries and applications because it can be easily shaped and carved into building materials, such as bricks and tiles. It is also used in the production of cement and concrete, as well as in the manufacturing of glass and ceramics. Additionally, sedimentary rock can be crushed and used as aggregate in construction projects, such as roads and bridges.
Nash Bridges - 1996 Rock and a Hard Place 6-1 was released on: USA: 6 October 2000 Germany: 28 January 2002 France: 7 April 2002 Hungary: 10 September 2007
Best is a subjective term. For ease of working, limestone, dolomite, or marble would be good. For strength and durability, igneous rocks such as granite or basalt would have the desired characteristics.
Marble is used in building's because of how strong it is and that it doesn't break easily.
they are useful because
It is both hard and soft rock becasue of the elves living inside it.
Most bridges are manmade, built in the location where they are required. Some natural bridges of rock or timber exist in wilderness areas.
Now, see, if you built a building at the epicenter of an earthquake, no matter what what ground is there, the building will inevitably collapse. Near an earthquake's epicenter, though, is a different story. The best ground would definitely be solid, packed soil. The best foundation for a building would be isolated, unless you had a smaller building like a house, which would be better off with an anchored foundation. The best type of building would have steel frame crossties-only on a skyscraper or tall, large office building like in New York, though.