Question
3. Which types of fossils are usefu as index markers'Describe the properties they have in common.
Answer
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Elliot
Master · Tutor for 5 years
Answer
The types of fossils useful as index markers are those that have wide geographic distribution, short temporal range, and distinctive, easily recognizable features.
Explanation
Index fossils are remains of organisms that were widely distributed, lived during a relatively short geological timeframe, and are easily identifiable. These characteristics make them invaluable for dating and correlating the age of rock layers.Key properties of index fossils include:1. **Wide geographic distribution**: The organism was present over a wide area, allowing correlation between different regions.2. **Short temporal range**: The organism lived for a brief period, providing precise time markers.3. **Distinctive and easily recognizable features**: The fossil has clear, distinguishable characteristics that make it easy to identify.Examples include ammonites, trilobites, and certain microfossils like foraminifera.