41. Point Roberts formed from the sand and gravel outwash of retreating glaciers 15, 000 years ago. 42. Past and present proglacial rivers in front of large ice sheets deposited large outwash plains of sediment. 43. If the ice had advanced outward and then retreated leaving behind an outwash , kettles may have formed. 44. In dry weather, drivers become aware of a ford by crunching across outwash detritus on the roadway. 45. For much of its length, Crooked Creek flows through Wisconsinan Till, Wisconsinan Outwash , and alluvium. 46. Because few glacial outwash plains survive elsewhere, Martha's Vineyard's frost bottoms are extremely unusual. 47. The melt water from the retreating ice-sheet formed outwash plains of gravel to the east and west. 48. Hunter built his gristmill where the gradient of Constant Creek flattens into an area of poorly drained glacial outwash . 49. Wisconsinan Outwash , which consists of stratified sand and gravel, also occurs in the creek's valley. 50. The bulk of the land on Cape Cod consists of glacial landforms, formed by terminal moraine and outwash plains.
