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.

Answer 1

Answer:

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Explanation:

First, the organism needs to be buried quickly so the bones do not rot, sinking in tar, sand storm sinking in mud etc. Over time more sediment will cover the organism, preventing decay. Being buried quickly and preserved away from predators are one of the reasons why marine life fossils are much more common the terrestrial animals as they are rarely preserved.

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Answer 2

Answer:

The main condition that is necessary for a mold fossil to form is that the hard parts of the organisms must dissolve.

Explanation:

• An organism must not devour itself or decay in order to become a fossil. If the creature either resides in or is relocated to a location where it may be buried and prevented from decomposing, this may occur.
• An organism has a better chance of being kept when it is buried rapidly since there is less degradation.
• Less likely to become fossils than the hard portions of an organism, such as its bones, shell, and teeth.
• Scavengers typically avoid eating these pieces, which may be one explanation for this.
• Additionally, because they degrade more slowly than soft parts, hard parts have more time to be buried.

Hence, the primary requirement for a mold fossil to form is the hard parts to dissolve.

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