Extinction
1996. Acrylic on canvas panel. 18"x24".
Essay
A hundred and fifty million years of dinosaur evolution produced some of the
most wonderful and terrifying beasts that ever lived. Tyrannosaurus rex was a
seven-ton carnivore that grew to a length of over forty feet. Yet for all its
size and ferocity, Tyrannosaurus rex suddenly vanished with the rest of the
dinosaurs in a geologic instant. Evidence in the fossil record hints that our
planet was struck by a small asteroid or a deadly hail of comets at the end of
the Cretaceous period, causing the mass extinction of earth's most famous
creatures.
For many years it was believed all of the dinosaurs perished at the end of
the Cretaceous period 65 million years ago. However, recent discoveries indicate
that a few dinosaurs may have survived for another million years beyond the end
of the Cretaceous. That would make them the first known Cenozoic era dinosaurs.
Extinction of the Dinosaurs
Time of Event: End of
Cretaceous period (65 million years ago)
Major Asteroid Impact Sites that are 65 Million Years
Old:
Chicxulub Crater
Place: present day
village of Chicxulub, northern shore of Yucatan Peninsula,
Mexico Crater Size: approximately 180 kilometers wide Asteroid Diameter: approximately
10 kilometers
|
Shiva Crater
Place: Arabian Sea off
Bombay, western shore of India Crater Size:
approximately 600 kilometers long, 450
kilometers wide, 12 kilometers deep Asteroid
Diameter: approximately 40
kilometers
|
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