The soft greyish limestone that crumbles easily is called chalk.
Limestone is a rock primarily composed of calcium carbonate, which often forms from the accumulation of the shells and skeletons of marine organisms, such as corals and mollusks. Over time, these organic materials can compact and cement together to create limestone deposits. Other similar rocks include chalk, a soft, white form of limestone made from microscopic marine organisms.
The rock described is likely to be shale, which is a sedimentary rock composed of clay minerals. Shale is typically white to gray in color, medium soft in texture, and fine-grained.
It is a limestone, hard.
The White Cliffs of Dover are composed mainly of chalk, a soft, white, fine-grained form of limestone formed from the remains of microscopic marine organisms. Chalk is known for its high calcium carbonate content and its characteristic white color, making it a prominent feature of the cliffs. Over millions of years, layers of chalk built up and were uplifted to form the iconic cliffs seen today.
Chalk is a soft white limestone that is commonly used for drawing on chalkboards or sidewalks. It produces a smooth and dusty line that can be easily erased or smudged.
chalk is a very pure form of limestone made of calcite. i think >:P
Two types of limestone are chalk, which is a soft, white sedimentary rock composed of the skeletal remains of marine organisms, and travertine, which is a form of limestone deposited by mineral springs, often found in caves and near hot springs.
WHITE Chalk isn't something that was invented. Chalk is a soft porous rock which is a form of limestone made up of the mineral calcite. Blackboards and blackboard chalks have been around since the late 1700's.
Nope - it's a mineral - calcium carbonate.
The common name for a chalk is simply "chalk". It is a soft, white, porous sedimentary rock used for writing or drawing on blackboards or sidewalks.
Hard and soft are relative attributes. Compared to a Marshmallow, limestone is very hard. It's even harder when comparing it with candy floss. In comparison to granite, steel or diamonds, limestone is a pretty soft rock.
The soft greyish limestone that crumbles easily is called chalk.
they are both rocks but both formed different ways chalk is formed by dead sea creatures skeleltons build up to form chalk and limestone is formed by shells and very littke amounts of mud and sand
hard
The main types of limestone are chalk, coral limestone, travertine, and tufa. Chalk is soft and white, coral limestone contains coral and other marine organisms, travertine is formed by hot springs, and tufa is a porous rock formed by calcium-rich water.
Yes, both limestone and chalk are forms of calcium carbonate. Limestone is a sedimentary rock composed mainly of calcium carbonate, while chalk is a soft, white, porous form of limestone composed of fossilized marine organisms.