They can, and do. Chalk and coquina are examples of limestone formed from skeletal or shell remains of marine organisms.
When marine organisms die, their shells can eventually become limestone rock through a process called lithification. This process involves the compaction and cementation of the shells over time, creating a solid rock formation.
limestone forms from skeletons and shells
Limestone made from shells would be an organic sedimentary rock.
limestone is made underwater from the shells of animals. We know this because limestone also contains many fossils.
shells
shells
carbonaceous shells form limestone which in this case is a bio-chemical sedimentary rock
Limestone and chalk.
Because the building is made of limestone, and the shells became integral to the limestone as it was being formed, but they don't erode as quickly as the limestone in the rain.
Limestone. However most large masses of limestone formed from coral reefs, not shells. The shell fossils in this limestone are "incidentals" due to shell dwelling organisms living on the periphery of the reef, not the bulk of the limestone.
Cement water =concrete. Clay limestone= cement shells stone =limestone plankton+stone =shells
Limestone is made up out of fossils of corals and shells from the water.