GENERAL GEOLOGY

Detailed explanation-1: -A mold is a hollow area in rock in the shape of an organism or part of an organism. A mold forms when the hard part of an organism, such as a shell, is buried in sediment. Later, water carrying dissolved minerals may seep into the empty space of a mold.

Detailed explanation-2: -Molds. A mold fossil is a fossilized imprint made in the substrate. The substrate is the rock or sediment on which a fossil makes its mark. Unlike cast fossils, mold fossils are hollow.

Detailed explanation-3: -Sometimes when an animal dies and its body decays, it can leave an imprint in the sediment. If this imprint fills in with minerals from sediment and groundwater, it can harden to form a fossil. This fossil is called a cast fossil. The fossilized imprint is called a mold fossil.

Detailed explanation-4: -Types of Fossils-Body, Molecular, Trace & Carbon Fossil.

Detailed explanation-5: -Molds fossils: A fossil mold is created when a shell or other structure is buried in sediment and then dissolved by underground water. The mold reflects only the shape and surface markings of the organism.