Final answer:
The claim that dinosaur fossils are commonly found in marine sedimentary rocks is false, as dinosaur fossils typically come from terrestrial formations. Fossils of marine creatures such as bivalves, trilobites, and belemnites are indeed common in such rocks.
Step-by-step explanation:
The statement "Dinosaur fossils are common in marine sedimentary rocks" is false. Most dinosaur fossils are found in terrestrial sedimentary rock layers, as dinosaurs were primarily land-dwelling creatures. However, fossils of marine organisms, such as bivalves, trilobites, and belemnites, are common in marine sedimentary rocks. These organisms lived in marine environments, and the sedimentary rock layers next to ancient bodies of water are ideal for preserving such marine fossils.
Furthermore, rocks from various geological periods, including the Permian period and earlier, contain early vertebrate bones, offering crucial insight into the diversity and evolution of early life forms on Earth. Fossil collecting from these rock layers can reveal a diverse array of fossils, not just of dinosaurs but also of other organisms that lived in those periods. For example, oysters are commonly found in certain sedimentary environments, indicating that the fossils are originally from such habitats.