Limestone made from shells would be an organic sedimentary rock.
Limestone
Limestone and chalk are formed from organic material Limestone - Clastic shell fragments Chalk - Microscopic shells of calicum carbonate plates formed by single celled algaes Chert - Microscopic siliceous organisms, recrystallized silica
Limestone is not generally referred to as an organic rock. It is primarily composed of calcium carbonate, which is a mineral. However, in some cases, limestone can contain remnants of organic matter such as shells, coral, or other marine organisms, which can give it a slightly organic origin. This is why some people may refer to limestone as an organic rock.
A purely chemical sedimentary limestone would contain no fossil remnants, organic limestone would.
Chalk is one limestone formed from organic processes. There are others.
Limestone made from shells would be an organic sedimentary rock.
the ocean
Limestone
Because they are primarily formed of organic materials.Read more: Why_are_limestone_and_coal_sometimes_referred_to_as_biological_rocks
Coral reef
Limestone and chalk are formed from organic material Limestone - Clastic shell fragments Chalk - Microscopic shells of calicum carbonate plates formed by single celled algaes Chert - Microscopic siliceous organisms, recrystallized silica
Conglomerate,Breccia,Sandstone,Siltstone,Shale,Rock salt,Rock gypsum,Dolostone,Limestone,Bituminous coal.
cement is formed from limestone by combustion of limestone ( heating of the limestone)!
concrete is formed from limestone by the combustion of the limestone (heating of the limestone)!
limestone pavement is formed by leaving exposed limestone for ages
Limestone and limestone formations.