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Within this channel were smaller erosional structures (&lt;10\u2009m deep) that truncate originally horizontal bedding, are floored by hardgrounds, and locally have a basal fill of granular phosphorite. The entire channel system was progressively infilled by chalk, as demonstrated by the expanded succession of the lower Campanian Culver Chalk Formation. The beds of the channel fill are cut by small step faults, resulting from gravitational collapse. Complete burial had taken place by the base of the upper Campanian Portsdown Chalk Formation, which is of even thickness across the region. The structures are interpreted with reference to high-resolution seismic profiles through chalk channel systems described from the German sector of the North Sea, and the Santonian\u2212Campanian of the eastern Paris Basin, and were formed by persistent bottom currents. Previous interpretations of the condensed Santonian\u2212Campanian chalks in the eastern Isle of Wight, involving penecontemporaneous tectonic inversion of the underlying basement structure, are rejected.<\/jats:p>","DOI":"10.1144\/jgs2012-044","type":"journal-article","created":{"date-parts":[[2013,3,13]],"date-time":"2013-03-13T12:59:33Z","timestamp":1363179573000},"page":"281-290","source":"Crossref","is-referenced-by-count":19,"title":["Channelling versus inversion: origin of condensed Upper Cretaceous chalks, eastern Isle of Wight, UK"],"prefix":"10.1144","volume":"170","author":[{"given":"A. 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