fossil
A mold fossil forms when an organism's hard parts dissolve and leave a cavity that later fills with sediment, creating a replica of the organism's shape.
When the hard parts of an organism decay and leave a cavity in the rock, a fossil mold can form. This mold is a negative impression of the organism's hard parts in the surrounding rock, preserving the shape and structure of the original organism.
Cast
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.
you would have to heat water until boiling and leave ochre in for several weeks
A mold fossil forms when an organism's hard parts dissolve and leave a cavity that later fills with sediment, creating a replica of the organism's shape.
When the hard parts of an organism decay and leave a cavity in the rock, a fossil mold can form. This mold is a negative impression of the organism's hard parts in the surrounding rock, preserving the shape and structure of the original organism.
Plants
Cast
Cast
The type of fossil that forms when an organism's hard parts dissolve, leaving a cavity that later fills with sediment, is called a cast fossil. This process typically begins with the original hard parts, such as bones or shells, being buried and eventually dissolving due to chemical processes. The resulting cavity can then be filled with minerals or sediment, creating a cast that reflects the shape of the original organism. Cast fossils provide important insights into the morphology and structure of extinct species.
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.
It seals off bacteria, air, and many other things that can cause organisms to decay. If the organism doesn't decay, it remains for... well, forever. As long as it doesn't leave the tar, however! :)
salt will dissolve
A bony fish because a jellyfish doesnt have that much of bones to leave behind.a bony fish
Cell Biology
A fossil mold forms when an organism's remains decay and leave behind an empty space in the rock where it was once located. This empty space can then be filled with minerals to create a fossil cast.