Which statement is NOT true about a sedimentary facies?

A sedimentary facies refers to a body of sediment that possesses particular characteristics, such as its mineralogy, grain size, texture, and fossil content, indicating its conditions of formation. The statement that fossil remnants will be consistent throughout the facies is not true because fossil assemblages can vary within different parts of a sedimentary facies. Various environmental conditions and depositional settings can lead to the presence of different fossils even in closely related regions of the same facies.

In contrast, lateral variations in mineralogy occur as different environmental conditions can lead to diverse deposition of sediments, and biofacies, which is based on the biological content, may not always align with lithofacies, which is based on rock type and physical characteristics. Additionally, it is possible to define subdivisions of facies based solely on biofacies, independent of lithological characteristics, due to the importance of biological data in paleoenvironments. Understanding these aspects is crucial for interpreting geological histories and depositional environments effectively.