Figure 1 in Identification of fossil worm tubes from Phanerozoic hydrothermal vents and cold seeps

Figure 1. 'Rocky Knob tubes', Middle Miocene, New Zealand. A, RK-5, larger tube fragments in hand specimen. B, RNT-1, smaller, parallel-aligned tubes, with one tube exhibiting fine longitudinal wrinkles on its surface (white arrow). C, 12-RK, detail of smooth tube wall. D, RNT-1, tube exhibiting round concretions on its surface. E, RK-15B-6B, tube in transverse section showing preserved torn fibres. F, RK-15B-6B, tube with irregular cross section suggesting it may originally have been flexible. G, RK-15B-6A, detail of join between three tubes with thick, multi-layered walls in transverse section; imaged using confocal laser scanning microscopy (see online for colour version). H, detail of tube transverse section showing delamination of its thick, multi-layered tube wall. Scale bars: A = 20 mm; B = 5 mm; C = 2 mm; D, F = 1 mm; E = 100 µm; G, H = 200 µm.