Edge of Charnwood, Derwent Inktense and Artbars in the Stillman and Birn Gamma Sketchbook
I do lots of quick demos of different mark making options with various media materials in my classes. Some end up as finished pieces but others have elements I like though aren't complete in themselves. This collage is made up from torn fragments with just a very little extra work - a few lines in copper oil pastel and artbar.
The rocks were once a stormy evening sky in a quick Artbar demo.
The Artbars and Inktense are lovely to use with their ability to create graphic marks as well as washes of colour and the S&B paper is thick enough to hold up to the collaged elements well.