graptolite in a sentence
n.
📚 Grade Level: Grade 11, Grade 12
Definition
Graptolite: a fossilized colonial organism from the Paleozoic era, primarily used as an index fossil for dating geological formations and understanding ancient marine ecosystems.
Sample Sentences
- Graptolites are an important index fossil used to date geological formations from the Ordovician to the Silurian periods.
- The study of graptolite fossils has provided paleontologists with valuable insights into ancient marine ecosystems.
- Researchers recently discovered a new species of graptolite, which has sparked interest in the diversity of these ancient organisms.
- Fossilized graptolites can be found in sedimentary rocks, often forming distinctive, branching patterns.
- Understanding the evolutionary history of graptolites helps scientists trace the development of early life on Earth.