Coral is the hard rock-like substance that is formed by skeletons of tiny sea animals. These calcareous skeletons build up and form islands and reefs.
It is a coral reef.
limestone
fossils...
shells, bones and fossils
sedimentary
sedimentary
The only rock that can form in this way is limestone formed from calcium carbonate concentrated in shells and exoskeletons like corals. The rock itself comes from sediment rich in these materials after the animals' deaths.
Shells plants o grow
shells, bones and fossils
limestone. A rock made up mainly of the shells or fragments of shells of megascopic (clams, oysters, snails) animals is a coquina. If the rock is composed of the shells (tests) of microscopic plants and animals it may be called chalk. Limestone can be a hardened chemical precipitate of CaCO3 without an organic source, and take many forms: oolite for example.
sedimentary
sedimentary
Arthropods are defined to be invertebrates that have an exoskeleton ( an external skeleton).
Skeletons:All animals, including humans have skeletons. Humans have an internal skeleton. This means that our bones is on the inside of us. When an animal has an external skeleton it means that their skeleton is on the outside. These animals who have an external skeleton have what we commonly call shells. These shells are their skeleton which keeps their insides together. If you think of one of those big crabs and how there is a shell on the outside of them (not sea shells) this is their skeleton which is an external skeleton.
The only rock that can form in this way is limestone formed from calcium carbonate concentrated in shells and exoskeletons like corals. The rock itself comes from sediment rich in these materials after the animals' deaths.
It was the skeletons/shells of living animals and plants.
No. Limestone is usually formed from the shells of marine animals or calcite precipitates from seawater.
Skeletal remains of many sea creatures settle on the ocean floor. Here they mix with sediments and eventually become sedimentary rock.
no they do not have an internal skeleton in order to grow they switch their shells
sand or soil