A famous Chinese
paleontologist said, "Sichuan is abundant in dinosaurs and Zigong is one
hometown for dinosaurs." Sichuan Basin is an important producing area of fossils
of dinosaurs living in the Jurassic period of Mesozoic era (dated from 195
million to 137 million years ago). The dinosaur fossils stored in Zigong City of
Sichuan Province, characterized by abundant quantity, concentrated buried
storage, numerous classifications and perfect preservation, are rarely seen in
the world. To our surprise, within the excavated and cleaned area of no more
than 3000 square meters, the quantity of unearthed fossils has reached up to
hundreds of tons. Consequently, Zigong City is reputed as "the cemetery of
dinosaurs" and "former residence of dinosaurs".
Nearly all known varieties of
dinosaurs' integral skeletons have been excavated here. In particular, abundant
unbroken dinosaurian skull fossils have been unearthed. (The dinosaur crania is
very fragile, so unbroken skull fossil is so rare that can only be found by
chance.)
Only fifth of the dinosaur
fossils explored around the world are derived from the Jurassic period (most
from the late stage), in the absence of that from the early and midst stages of
the same period. However, the dinosaur fossils unearthed in Zigong mainly
originating form the proof-absent stages, filling up the weak link in studies on
dinosaurs.
In addition to dinosaur
fossils, there are also abundant fossils of other backboned animals coexisting
in the same period, which is also very valuable.
The year of 1986 witnessed the
construction and opening of Zigong Dinosaur Museum on the excavation site. The
museum enjoys equal fame with USA State-run Dinosaur Park and Canada Dinosaur
Park, reputed as the "top 3 biggest dinosaur museums". The US journal
National Geography once praised: "Zigong Dinosaur Museum is the best in the
world."
Representative
Fossils
Shunosaurus
lii
It was a medium-sized dinosaur, with the adult's length of 9-12
meters. Its characteristics include: short neck, spoon-shaped teeth, relatively
short collum, and simple vertebrae conformation. It walked on four limbs, with
the hind limbs obviously longer than the forelimbs. Mainly living by the bank of
lakes and rivers, it fed on succulent, soft and tender vegetables.
Omeisaurus
tianfuensis
It was a
large-sized and evolutional Sauropod dinosaur, with a length
of 20 meters. It is estimated that the weight of the living body was about 30
tons. It had relatively big skull, spoon-shaped teeth, long neck, and four
thickset limbs, with rather complex cervical vertebrae and back vertebrae.
Mainly dwelling on extensive alluvial plains, it fed on tree-crown of
megaphanerophytes.
-- Yandusaurus multidens
Walking on two feet, it was a small dinosaur with a length of 1.4
m. It had small head, short snout, big and round orbital cavity, upper and lower
jaws full of teeth, short forelimbs and long and slender hind limbs. Good at
running, it haunted the scrub forests, feeding on various foods.
Gasosaurus
constructus
It was a smaller sarcophagy dinosaur, with a body length about 4
meters. It had light skull, edgy teeth, degenerated forelimbs used for catching;
and stout posterior limbs convenient for scamper. It was a ferocious
animal,running agile.
Yangchuanosaurus
hepingensis
It was a large-sized sarcophagy dinosaur, with a length of 9
meters. Featuring big and lumpy head, dagger-shaped sharp teeth on the jaw,
short forelimbs and long posterior limbs, and big and sharp claws, it was the
most integral meat diet dinosaur found in Asia at present.
Mamenchisaurus
youngi
It was a large-sized dinosaur, with a length of 16 meters. Its
head was small, with a collum composed of 19 sections of grown cervical
vertebrae accounting for half the full length of the body. Its tail was long. It
mainly fed on withes and burgeons of mega-phanerophytes.
Agilisaurus
louderbacki
Agilisaurus louderbacki was a small dinosaur with a length of 2 meters. It had
a little body, short forelimbs and long hind limbs. Its orbital cavity was
divided into two open pores up and down by eyelid bones. Being alert and good at
tantivy, it always haunted the brushwood. It is an omnivorous animal.
Huayangosaurus
taibaii
With a body length 4 to 5 meters, a small head, aculeate
spine plate on the shoulder, and two pairs of spurs on the tail end, it walked
on four limbs and fed on burgeons and grass.