Allosaurus vs Apatosaurus

Allosaurus vs Apatosaurus

A full grown Apatosaurus could have weighed up to 50 tons.  In this drawing a young Apoatosaurus is up against a pair of Allosaurus.  One Allosaur is in the foreground and the other
sub-adult is trying to grab at the tail of the much larger Sauropod.  Apatosaurus was a Sauropod, that is a long neck land herbivore that were the largest land animals to ever live on Earth.  Of course Apatosauus was not the biggest Sauropod.  But at 50 tons it drawrfed its predators, the Allosaurs of the Jurassic Period.  Allosaurs grew to around 40 feet or 12.2 meters long and weighed in at around 2 or 3 tons.  Some estimates put Allosaurus at a shorter length.

Some relatives of Allosaurus had larger heads, such as Torvosaurus.  All the Allosaurs lived in the Jurassic Period.  On the other had, some Sauropods surived and grew even larger in the Cretaceous Period.   

Allosaurus found at Cleveland-Lloyd Quarry  

At the Cleveland-Lloyd Quarry in Easter Utah around 46 Allosaurs were found.  It is thought that perhaps this had beena predator trap.  Maybe the Allosaurs spotted a dinosaur trapped in mud and ...thinking with their stomachs.... jumped in for what looked like free food.  But then the Allosaurs got stuck in the mud too.  This went on many times and the result was lots of Allosaurus fossils.  So Allosaurus is the state fossil of Utah.  

Analysis of Allosaurus' brain case show a brian much like that of a crocodile, so jump in at the prey, ask questions later.  The result of this is those 46 Allosaurus found in the above mentioned quarry.

You will notice that the camoflauge markings of the dinosaurs make them harder to see up against the background of the forest.  Although that is not good art technique. . . it IS good science.  The Pterosaur is a Rhamphorynchus.  

NOTE:  Printable versions of the drawings are found by clicking on the top buttons labeled either....

. . . . . Paleontology . . . . . or . . . . . All Printables. . . . . Scroll down the drop down menu to the bottom for NEW drawings.  Older drawings are found further up the lists.  I am now going to add some older drawings of Allosaurs and Sauropods from previous posts.

Allosaurus by a River

Allosaurus caring for her Chick

t

Apatosaurus herd Migration