- GeoRef, Copyright 2004, American Geological Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
"The definition of a recumbent fold as one with subhorizontal axial surface is beset with difficulties when recumbent folds plunge. Recumbent folds are redefined here as folds whose axial planes give subhorizontal trace in profile plane, with the fold-axis plunging at any angle up to 80 degrees . A neutral to slightly antiformal recumbent fold half mile across and plunging 75 degrees is described from the Pre-Cambrian metamorphic terrain in eastern India."