They are found in stone. They are created naturally. They give information about animals which lived a very long time ago.
To accurately answer your question, I would need to know which specific fossils you are referring to, as different fossils can originate from various geologic periods. If you provide the names of the fossils or their characteristics, I can help identify the geologic period during which they formed.
Yes, index fossils are typically easily recognizable because they are common, widespread, and distinct in appearance. These fossils are used as markers for specific time periods in geological strata due to their unique characteristics.
Radioactive isotope dating (potassium, argon) and relative dating, comparing with fossils of the same characteristics with known dates. Particularly if they are known to be 'zone fossils'
We can look at fossils to determine what physical characteristics each organism had and compare them to other organisms to see what characteristic's they have in common or how the changed (evolution)
they were index fossils because they were found everywhere, had distinct characteristics, and lived for a short period of time.
Scientists use the following four steps to study fossils: 1. Excavation - careful digging to uncover fossils, 2. Preparation - cleaning and preserving fossils, 3. Description - documenting physical characteristics of fossils, and 4. Analysis - using various methods to interpret the fossils' age, environment, and relationships to other organisms.
The most useful characteristics of fossils for correlating sedimentary rock layers are their age, distribution, and ecological significance. Index fossils, which are species that were widespread but existed for a relatively short geological time, provide clear time markers. Additionally, the presence of specific fossil assemblages can indicate similar environmental conditions, helping to correlate layers from different locations. Overall, these characteristics aid in establishing a timeline and understanding the depositional environments of the sedimentary rocks.
two charachteristics that all good sources of animal fossils have in common are they occur in fairly large numbers in rock layers and have clearly distinguished charchterisitics
Presence of fossils and stratification of the rocks structure into different layers.
Common characteristics of sedimentary rocks include layering (stratification), grains or particles of different sizes and shapes (sedimentary structures), fossils, and the presence of minerals like quartz, calcite, and clay minerals. These rocks are formed from the accumulation of sediments that are typically deposited by water, wind, or ice.
sedimentary rock my guy fossils fossils fossils fossils fossils fossils fossils fossils fossils fossils nbut u cant see thrm lel
Imprint fossils, Mineralized fossils, frozen fossils, fossils in amber, and cast fossils.