Abstract
The offshore-shelf sand ridge (‘offshore bar’) facies model was developed during the 1970s to 1980s which interpreted isolated shallow marine sandstone bodies, especially those in the Cretaceous Western Interior Seaway of North America, as mid-shelf deposits. Then along came sequence stratigraphy: sea-level changed rapidly, erosion surfaces appeared and former ‘offshore bars’ disappeared. Most became low-stand shoreface deposits, resulting from ‘forced regression’, but for others they became trangressively-infilled incised valleys. For some workers, the new ‘lowstand shoreface model’ completely discredited the original ‘offshore bar’ facies model and consigned it to history. But the controversy had not disappeared, it was simply lying dormant. These dilemmas were faced head-on during a SEPM-sponsored research conference (in 1995), …
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