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A diverse array of ichnofossils have also been found at Joggins, including vertebrate trackways, invertebrate trace fossils, tunnel structures, rhizoliths, and possibly wood borings. [ 12 ] Fish coprolites are abundant in the limestone of the Joggins Formation, averaging lengths of 2–3 cm (0.79–1.18 in). [ 12 ]
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Deep sea mining is the extraction of minerals from the seabed of the deep sea. The main ores of commercial interest are polymetallic nodules , which are found at depths of 4–6 km (2.5–3.7 mi) primarily on the abyssal plain .
Rock core samples, the product of a diamond rig.A pied butcherbird perches nearby.. A core sample is a cylindrical section of (usually) a naturally-occurring substance. Most core samples are obtained by drilling with special drills into the substance, such as sediment or rock, with a hollow steel tube, called a core drill.