Fossil Specimens Discovered in The USAHundreds of garfish fossils that have been collected give evidence that these still-living fish have remained .... |
|
|
CATERPILLAR
Age:
300 million years oldSize: 50 millimeters (1.9 in); matrix: 58 millimeters (2.2 in) by 33 millimeters (1.2 in) Location: Morris, (Mazon Creek), Illinois Formation: Francis Creek Shale Period: Pennsylvanian ..... More GARFISH
Age:
54 to 37 million years oldSize: 39 centimeters (15.3 in) in length; matrix: 29 centimeters (11 in) by 40 centimeters (15 in) Location: Lincoln County, Wyoming Formation: Green River Formation Period: Eocene ..... More STINGRAY
Age:
54 to 37 million years oldSize: 8 centimeters (3.2 in) by 3.8 centimeters (1.5 in); matrix: 12.7 centimeters (5 in) by 10 centimeters (4 in) Location: Lincoln County, Wyoming Period: Eocene ..... More |
INTRODUCTION
Some
150 years ago, the British naturalist Charles Darwin
proposed a theory based on various observations
made during his travels, but which could not be
supported by any subsequent scientific findings.
In essence, his theory of evolution consisted of
various scenarios, ...MoreWHAT IS A FOSSIL?
In
the broadest definition, a fossil is the remains
of a living thing that lived long ago and that has
survived down to the present day by being preserved
under natural conditions. The fossils that come
down to us are parts of an organism, or remains
left behind when the living thing concerned was
still alive ...More |