Here is an update.... the foreground has been layed in and surprisingly it ended up quite dark. I really didn't want the foreground to hold the viewers attention for long, but let it gradually follow the water up thru the trees and into the background.
Here is a small update as I didn't have much drawing time this week. Continued to work on the middle-area rocks, crevices and shadows. I've also sketched in the foreground rocks and placement of the wildflowers.
At first glance of the scene, the cracks in the rocky landscape may "visually look" like nothing more than a line. But if you observe closer, you will see the irregularity of the crack or crevice. It will be darker and wider where the crack is more open and thinner and lighter where it is narrower. Closer observation and understanding of "what" you are looking at will help you determine that a straight and evenly applied pencil stroke will not realistically represent that crevice.