Colour pencils and pastels on A1 (46.8 x 33.1 in) terracotta paper.
This was largely inspired by the collection of autumn-themed illustrations recently collected on Tor.com (which I posted about and would heartily recommend). I also remembered reading somewhere that the end of the Cretaceous Period saw more seasonal weather. Plus I had this piece of terracotta paper and couldn't think of what to do with it. All these things collided in this image: a Triceratops on alert during a breezy autumnal sunset...