A NEW CRESTED DINOSAUR 



By Barnum Brown 



With photographs by the Author 



THE most recent acquisition in the dinosaur hall is the skeleton of a 

 new dinosaur found by the Museum expedition to Alberta in 1911. 

 This specimen is exhibited as a vertical panel mount, the bones 

 still partly buried in the original rock from which they have been chiseled 

 in relief and for the most part in the position as found excepting that the 

 skeleton was lying horizontal on its right side. 



When the dinosaur was found, ripple-marked sandstone surrounded the 

 skull and a part of the skeleton. These ripples in which are seen worm 

 tracks and impressions of horsetails or scouring rushes (Equisetum) have been 

 continued above the skeleton as though the body had been washed in near 

 shore making a dam in the shallow water, and the shoreward side of the 

 beach had dried up forming mud cracks. 



The skeleton with pieces of skin clinging to it here and there was evi- 

 dently buried on a sandy beach with comparatively little disturbance of 

 the bones. Millions of years passed, the bones turned to stone and hun- 

 dreds of feet of earth accumulated above them as the low-lying coastal 

 marshes were filled in while the climate then subtropical changed to tem- 

 perate cold. Finally the Red Deer River, a comparatively recent water- 

 course, began to cut through these sediments, uncovering fossil treasures 



Professor Henry F. Osbom and party in canoe leaving the fossil camp near Tolman, 

 Alberta, for a 150-mile trip down the river to the Belly River Cretaceous beds 



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