Question
Which condition is necessary for a mold fossil to form?
The fossil must be preserved in amber.
Minerals must replace the remains.
The mold must be filled with sediment.
Hard parts of the organism must dissolve.
The fossil must be preserved in amber.
Minerals must replace the remains.
The mold must be filled with sediment.
Hard parts of the organism must dissolve.
Answers
GPT-4o mini
The condition necessary for a mold fossil to form is that **hard parts of the organism must dissolve**. In this process, the hard parts leave an impression in the surrounding sediment, creating a mold of the organism. This is different from casting, where the mold is filled with sediment to create a cast fossil.