These are called "replacement fossils" also "petrification"
a petrified fossil
The hard parts.
Fossils can only form when the conditions are right. These conditions are in a sedimentary layer of the earth which are able to preserve soft and hard parts of the item.
Animal parts that are soft and don't have a skeleton leave the worst imprints. Fossils are made with animal parts that are hard and durable.
noFossils can form when the remains of an organism decay. ... When a dead organismis buried, it often decayscompletely, leaving only an impression in the rock in a formof a hollow mold. The hard parts are most likely to leave an impression, although sometimes so can soft parts.
Those surrounded by skeletal structures
They do not decompose as quickly as other fossils, so tissue and other soft parts tend to be preserved.
Fossils can only form when the conditions are right. These conditions are in a sedimentary layer of the earth which are able to preserve soft and hard parts of the item.
Ones with hard bony parts, soft tissues do not from fossils.
When an organism dies, its soft parts often decay quickly or are eaten by animals
no fossils of organisms with hard parts. the few soft body part fossils found rarely fossilize well.
Animal parts that are soft and don't have a skeleton leave the worst imprints. Fossils are made with animal parts that are hard and durable.
noFossils can form when the remains of an organism decay. ... When a dead organismis buried, it often decayscompletely, leaving only an impression in the rock in a formof a hollow mold. The hard parts are most likely to leave an impression, although sometimes so can soft parts.
Imprint
Those surrounded by skeletal structures
The difference is in the name; soft corals are soft have body ; with no bony or hard Parts
No. The hard bones are more likely to form a fossil. The soft parts will degenerate over time. This is why most of the fossils from the Pre-Cambrian and Cambrian periods are mostly shells, not the actual animals that inhabited them.
They do not decompose as quickly as other fossils, so tissue and other soft parts tend to be preserved.
The difference is in the name; soft corals have a soft body, with no bony or hard parts. In contrast, hard corals have a hard endoskeleton made of calcium carbonate.