Explain how a fossil mold different from a fossil cast
A fossil mold and a fossil cast are two different types of fossils that are formed through different processes. Let me explain each of them individually:
1. Fossil Mold: A fossil mold is formed when an organism or a part of an organism gets buried in sediment, and then the organic material decomposes or dissolves over time, leaving behind an empty space or imprint within the sediment. This empty space is called a mold. Essentially, a fossil mold is a negative impression or a hollow space left by the organism.
To create a fossil mold, follow these steps:
1. Select an object or organism that you want to make a mold of.
2. Prepare a mold-making material such as silicone rubber or alginate.
3. Apply the mold-making material over the object, making sure to capture all the details.
4. Allow the mold to cure or dry according to the instructions provided.
5. Carefully remove the cured mold from the object, ensuring that it retains its shape.
2. Fossil Cast: A fossil cast, on the other hand, is formed when the mold created by the organism's impression gets filled with minerals or sedimentary material over time. This filling material hardens and takes the shape of the original organism or the hollow space left by it. As a result, a fossil cast is a solid replica of the original organism.
To create a fossil cast, follow these steps:
1. Take the mold of an object or organism using the method mentioned above.
2. Mix a casting material, such as plaster or resin, according to the instructions provided.
3. Pour the casting material into the mold, ensuring that it completely fills the hollow space left by the organism.
4. Allow the casting material to harden and set according to the recommended curing time.
5. Carefully remove the solid cast from the mold, ensuring that it maintains its shape and details.
In summary, a fossil mold is an empty impression or hollow space left by a buried organism, while a fossil cast is a solid replica of the original organism created by filling the mold with minerals or sedimentary material. The process of making a fossil mold involves capturing the negative impression, while making a fossil cast involves pouring a casting material into the mold and creating a solid replica.