What kind of rocks can contain fossils?

Answer 1

A rock's composition and geographic location give clues to the age and identity of the fossils it contains. A fossil, by definition, is at least 10,000 years old. Some may be millions or even billions of years old, since the earth itself has been around for nearly five billion years.

Coquina rocks

Tiny coquina shells found along the coasts of California and Florida form into beds of fossil rock also known as bridles. Examples of coquina limestone known as ophiuroid are on display at the Peabody Museum of Natural History at Yale University and the Florida State Museum. The Peabody also has abundant examples of Miocene brittlestar coquina fossil from the Santa Margarita Formation in California. Miocene fossils are between 5 and 25 million years old.

Answer 2

Before you know which rocks contain fossils it is necessary to know what a fossil is. Fossil is a remain of ancient organism body or their activities preserved in sediments or rocks. Fossil may include whole body of organism, Its hard or soft part or the remains of their tracks and trails. It is not necessary for a fossil to be only the whole body or hard part of the Organism body. Fossils preserve by several processes combinely known as Fossilization. This fossilization requires certain geologic conditions for example Quick burial, an aerobic conditions, supply of enough sediments.

The answer is clear from the above paragraph that fossils are preserved in sediments under certain conditions. Fossilization occurs along with sedimentation. But the fossils of every type can survive upto certain PT condition. when the temperature will cross that limit than the fossils will destroy; no more fossil will remain within the rock. Therefore Igneous and Metamorphic rock are lacking fossils because of high PT condition. The only rocks having fossils preserve in them are the Sedimentary Rocks and some low grade very metamorphic rocks. Sedimentary rocks contains abundant of fossils especially limestone shale containing all types of Fossils.

Answer 3

Sedimentary rocks, such as sandstone, shale, and limestone, are the most common types of rocks that can contain fossils. This is because fossils form when organisms are buried in sediment and the minerals in the sediment replace the organic material, creating a fossil. Igneous and metamorphic rocks are less likely to contain fossils because their formation processes typically do not preserve organic material.

Answer 4

Sedimentary Rock

Answer 5

Mainly Sedimentary