Figure 4From: Advantages of doubly polished thin sections for the study of microfossils in volcanic rockMicrophotograph of close-up pictures of the filament in figure 2A and B showing internal microstructures. Note the different layers and the variations of each layer. Arrows in figure B marking three parallel layers within the filament and a tube in the middle. Arrows in figure C marking possible trichome remnants in the tube, small spheroidal features. Scale bars in A: 10 μm, in B: 5 μm and in C: 1 μm.Back to article page