huh? re: Pudding stones are glacially rounded sedimentary stones ... The rounded stones in New England were slowly tumbled over and over by the superbulldozer action of the enormously heavy ice sheet advancing and retreating every year for many many years.

so pudding stones can be created by a river-- but NE pudding stones are created by a glacier-- and properly called glacier erratics? the very same glaciers that came to a halt here on Long Island north shore -- creating overlapping terminal morains? -- North Hills morain and Ronconkama morain form the back bone of Long Island..and fill my yard with the same pudding stones