FIGURE 15. Graptolites (Climacograptus), Upper Ordovician, Sularps Kvarn, Fågelsången, Scania (NRM Cn 54044). Image produced from Figure 8 by subtracting the green channel of B from that of A, using Adobe Photoshop’s “Subtract” mode (settings: Opacity = 100; Offset = 100; Scale = 1) and subsequently adjusting the levels. (Click on the picture to toggle between this figure and the original Figure 8A and 8B.)