Limestone 01

Limestone
Limestone is especially popular in architecture, and many landmarks around the world, especially in North America and Europe, are made primarily of the material.
The History Says
Limestone was most popular in the early 20th and late 19th centuries. Train stations, banks and other structures from that era are normally limestone.
The Present Scenario
Travertine is a banded, compact variety of limestone formed along streams, particularly where there are waterfalls and around hot or cold springs. Calcium carbonate is deposited where evaporation of the water leaves a solution that is supersaturated with chemical constituents of calcite. Tufa a porous or cellular variety of travertine, is found near waterfalls.