guide fossil (Meaning)
guide fossil (n)
a fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found
Synonyms & Antonyms of guide fossil
No Synonyms and anytonyms found
guide fossil Sentence Examples
- The fossilized remains of a fern served as a guide fossil, revealing the age of the rock layer.
- The presence of trilobites in the sediment indicated that the rock was formed during the Cambrian period, serving as a guide fossil for that era.
- Geologists use guide fossils to correlate different rock layers and establish the chronological sequence of events in Earth's history.
- The abundance of brachiopods in a particular stratum acted as a guide fossil, suggesting shallow marine conditions at the time of deposition.
- The discovery of ammonites in the rock formation helped researchers identify it as belonging to the Mesozoic era, thanks to their value as guide fossils.
- Foraminifera in deep-sea sediment cores serve as guide fossils, providing insights into past environmental conditions and climate changes.
- The guide fossil of the Paleozoic era, graptolites, allows geologists to determine the relative age of sediment layers containing them.
- The presence of index fossils, such as the conodont Hindeodella, provides a precise guide to the boundary between different geological periods.
- The identification of echinoids in a rock sample guided paleontologists in determining the age and depositional environment of the sediment.
- Guide fossils play a crucial role in paleontology, enabling researchers to reconstruct ancient ecosystems and understand the evolutionary history of life on Earth.
FAQs About the word guide fossil
a fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found
No synonyms found.
No antonyms found.
The fossilized remains of a fern served as a guide fossil, revealing the age of the rock layer.
The presence of trilobites in the sediment indicated that the rock was formed during the Cambrian period, serving as a guide fossil for that era.
Geologists use guide fossils to correlate different rock layers and establish the chronological sequence of events in Earth's history.
The abundance of brachiopods in a particular stratum acted as a guide fossil, suggesting shallow marine conditions at the time of deposition.
