It would necessarily be sedimentary rock, formed in a saltwater or freshwater environment, depending on the type of clam.
You have to have the dead remains buried quickly and then never distroyed
To compare the relative ages of fossils, scientists use an early recognized species called an index fossil. An index fossil must have existed for a short period time and must have covered a wide geographical range.
No. At one time yes. It must be very old. Definition of fossil per www.dictionary.com: any remains, impression, or trace of a living thing of a former geologic age, as a skeleton, footprint, etc.
Geologist must use their knowledge of the events that disturb or remove rock-layer sequences to help piece together the history of Earth as told by the rock record.
Darwin realized after seeing a bunch of fossils (and the differences between the finches on the Galapagos Islands) that animals must be adapting to better fit their environments, and thus, becoming more diverse.
NO
The UV rays must pass through atmosphere. So the layer must be in Atmosphere. The layer of the atmosphere is he ozone layer.
We must all be concerned about ozone layer. It is because this layer is depleting.
A router must implement the Physical layer, the Link layer, and the Network layer
Index fossils are the fossils of short-lived species which, because of their short lives, can be used by scientists to identify the age of the rock strata in which they're found. (For example, if you know a certain species only lived in the Cambrian period, and you find some fossils of this species in some rock, then you know the other fossils you find in that rock must also have come from the Cambrian period.) Some examples of species that left behind index fossils, and their related historical periods, are:Billingsella corrugagta - Cambrian period, Palaeozoic eraCactocrinus multibrachiatus - Mississippian period, Palaeozoic eraScaphites hippocrepia - Cretaceous period, Mesozoic eraNeptunea tabulata - Quarternary period, Cenozoic eraSee the links below for more examples and info.
The physical layer - layer 1.
first you must look in the crack or the anal colum in the rear region of the the soil
Relatively short rime span. To be an index fossil, a fossil organism must be easy to identify and many fossils of that organism must exist. You are using the 7th grade interactive reader...... Naughty naughty naughty
To be considered index fossils, fossils must meet three key criteria: they should have a wide geographic distribution, indicating that the species existed over a broad area; they must be limited to a short time range in the geologic record, allowing for precise dating of rock layers; and they should be easily recognizable and distinctive, facilitating identification. These characteristics make index fossils valuable for correlating and dating geological formations.
Index fossils provide a reference of time throughout rock layers. In order to be a good index fossil, the life form must have lived for a short and specific amount of time and must have existed over a large area. Index fossils serve as a reference to geologists in correlating rock layers. They can match up (or correlate) the index fossils which helps them match up (or correlate) the rock layers.
We must not stop the ozone layer. It protects us from UV rays.
Ozone layer is depleting. To protect it must curb the use of CFC's.