why are landslides more common on steep slope
Slope stability is ultimately determined by two factors...
Rajasthan was the leading producing state accounting for (21%) of the total production of limestone, followed by Madhya Pradesh & Andhra Pradesh (11% each), Chhattisgarh & Karnataka (10% each), Gujarat,Tamil Nadu & Telangana (8% each), Maharashtra & Himachal Pradesh (4% each), and the remaining 5% was contributed by …
Limestone and chalk are sedimentary rocks of organic origin derived from the accumulation of corals and shells in the sea. … Limestone is soluble in rain-water, which, with carbon dioxide from the air, forms a weak acid. A region with a large stretch of limestone therefore possesses a very distinct type of topography.
As limestone is a permeable rock, water is able to seep down through the cracks and into the rock. Rainwater is a weak carbonic acid which reacts with the limestone as it passes through the rock, dissolving the stone while enlarging joints and bedding planes.
Lime is made by first burning chalk or limestone to form quick lime (calcium oxide) and then slaking the quicklime with water (forming calcium hydroxide). If no clay is present in the original limestone or chalk, the resulting lime is said to be ‘non-hydraulic’.
3000 B.C. The Egyptians tanned their skin with lime and built one of the limestone wonders of the world; the 137 m high Cheops pyramid.
Marine limestone forms because seawater has high concentrations of two key dissolved chemicals—calcium (Ca++) and bicar- bonate (HCO3 –) ions. In the near-surface layer of most oceans, corals, clams, and Earth’s surface.
These arbitrary labels are based on the premise that igneous and metamorphic (crystalline) rocks—granite and gneiss, e.g.—are harder than sedimentary rocks, such as limestone and shale. Calcite in limestone is quite as hard as that in marble, and the grains of quartz in sandstone are as hard as those in quartzite.