Figure 6 in Identification of fossil worm tubes from Phanerozoic hydrothermal vents and cold seeps

Figure 6. 'Canyon River tubes', Oligocene, Washington State, USA. A–C, WA-CR LACMIP 16957; A, large-diameter tubes in hand specimen; B, smooth small-diameter tubes; C, small-diameter tube with longitudinal wrinkles. D–F, JLG 473; D, delaminated tube wall with a fragment of preserved multi-layered tube wall (white arrow); E, uncompressed transverse section of a small diameter tube; F, detail of tube wall showing fluorescent bands that likely indicate the presence of preserved organic matter from the tube wall, imaged using confocal laser scanning microscopy (see online for colour version). Scale bars: A = 20 mm; B = 5 mm; C = 3 mm; D = 150 µm; E = 300 µm; F = 30 µm.